soybean plant spacing


103:1712-1716. 100:704-710. Most corn planters are set to plant 30-inch rows, and 15-inch soybeans are generally planted by using split-row units placed between the 30-inch rows. In light of these findings, seed cost may not be a requisite consideration for row spacing decisions. This Crop Insights reviews research results, current row spacing trends, and factors beyond yield potential that may influence row spacing preferences of soybean growers. For that reason, numerous research studies have been conducted over the last 40 years to determine optimal soybean row spacing. We typically see a yield advantage, however, for soybeans in rows 20 inches or less. Kelly. Pedersen, P., and J.G. Mid-South soybean yield and net return as affected by plant population and row spacing. 94:603-611. 1,2,3 In less productive fields or low-producing areas within fields, the final stand may need to be around 135,000 plants/acre. Planting soybeans has gone from 30-inch rows to 7.5-inch rows with a drill back to 15-inch rows with a planter. 96:462-468. Figure 2. Soybean row spacings (in inches) in North America as a percentage of total acres, average 2011-2015. Row width is one of the management practices most often considered by growers as potentially important to increased soybean yields and profits. As a result, soybeans planted in 15-inch rows have gained in popularity as a way to capture some of the yield benefit of drilled narrow rows while using a planter instead of a drill. Fawcett, Jim; Sievers, Josh; Rossiter, Lyle; and Rogers, Jim, On-Farm Soybean Row Spacing Trials. However, acreage planted to 30-inch rows has also increased in almost all regions of North America over the last several years, reversing the long-term trend away from wider rows. Pearce, and M.R. 2006. Munkvold. Agron. J. Narrow rows have a yield advantage because they decrease the time to canopy closure and intercept more light throughout the season. Opting not to split large planters means that both corn and soybeans are typically … A review of soybean row spacing studies published within the past 10 years generally confirms previous results comparing 30-inch rows and drilled narrow rows. It should be a surprise, that the majority of the farmers in Iowa still use 30 inch row spacing despite research across the Midwest that has shown an advantage of narrow row spacing. Figure 1. Average yield results from ten soybean row spacing studies published during the last 15 years. Even in areas such as Eastern Canada and the Northeastern U.S. where drilled narrow rows is still the most common soybean row configuration, drilled acreage has dropped over the last five years. It is recommended not to drill beans and use a tolerant variety to white mold if a specific field has a history of white mold. Three planting densities were applied (70, 90 and 110 seeds per 1 m 2) with two row spacing (16 and 32 cm), in 4 replications. Harrison, Jr. 2004. Plant soybeans as early as possible after April 25 as soil conditions permit; if possible, complete planting by May 20. A more important factor determining the potential for white mold is environmental conditions. Despite these results, narrow-row soybean adoption has varied widely across North America. 2Purdue Extension recommends row spacing between 7.5 and 15 inches for maximum soybean yield. Renner, D. Penner, R. Hammerschmidt, and J.D. Use of nitrogen stress to demonstrate the effect of yield limiting factors on the yield response of soybean to narrow row systems. Thompson, N.M., J.A. In spite of this advantage, row spacing preferences vary greatly across North America, and 30-inch row soybeans are common and reflect a shift in planting attitudes. Nine studies that compared 30-inch rows and 15-inch rows found similar results, with 15-inch rows holding a 4.0 bu/acre yield advantage. 2005. In most cases, there is no difference between 7.5, 10, 15, or 20 inch row spacing and anything less than 30 inch is therefore consider narrow row spacing. Agron. For instance, if you live in central Minnesota and originally planted a RM 1.7 variety, by about June 10 switch to an early group I soybean (such as a … 1998. Equipment and workload considerations are unique for every farm operation and ultimately come down to the needs of each individual grower. Planting soybeans is really nothing new, and you can say the whole thing has come full circle. 2008. Locations, years, row spacings, and average yields of soybean row spacing studies summarized in Figure 1. Agron. In general, studies have found that soybean yield potential is often greater with row spacings narrower than 30 inches. 1: Hanna et al., 2008; 2: De Bruin and Pedersen, 2008; 3: Kratchovil et al., 2004; 4: Cox and Cherney, 2011; 5: Janovicek et al., 2006; 6: Bertram and Pedersen, 2004; 7: Pedersen and Lauer, 2003. However, row spacing practices vary widely across different areas. This demonstrates that many different considerations beyond simply yield potential can affect the best practices for each individual grower. Such scenarios include northern soybean producing regions where the growing season is shorter (Lee, 2006), early soybean production systems where short maturity varieties are planted early to avoid drought (Holshouser and Whittaker, 2002), delayed planting situations (Lee, 2006), and double-crop systems (Minor and Wiebold, 1998; Holshouser et al., 2006). 1. Soybeans grow best where the daytime temperature averages between 60°F and 70°F (16-21°C). Soybeans are not frost-tolerant. © 2020 Corteva. Soybean row spacing and weed emergence time influence weed competitiveness and competitive indices. ISU Extension and Outreach 103:123-128. Cox, W.J., and J.H. Narrow-row soybeans offer some harvestability advantages over soybeans in 30-inch rows. The rationale behind increasing row spacing is to increase light penetration and air movement in the lower canopy, thereby making conditions less favorable for white mold development. Fungicide application timing and row spacing effect on soybean canopy penetration and grain yield. Narrower rows spacings are likely to provide a greater yield benefit in systems where soybeans have a limited time frame for vegetative growth prior to flowering. Research on soybeans in 15-inch rows is less extensive, having been conducted mostly within the last 10 to 15 years as this row spacing has gained popularity. Soybean plantings after June 20 in central/western NY and after June 10 in NNY can be risky, even with Group 0 varieties, especially if the remaining part of the growing season is cool or if frost occurs before October 1. Planting and spacing. White mold is the largest concern for many growers in Iowa. Planting the right soybeans for your field is vital to maximize the profitability of every acre on your farm. Esker, G.P. How row spacing … 2006. Factors such as equipment costs, workload management, and disease management all play an important role. However, the total number of operator hours spent planting would be greater and the second planter would require a second operator, which may not always be feasible. Kratchovil, R.J., J.T. A compilation of these studies by Purdue University researchers in 2003 showed an average 6.2 bu/acre yield advantage for drilled soybeans (Lambert and Lowenberg-DeBoer). Lee. (No studies in sandy soils). It is difficult to weigh the potential yield benefit of narrow-row soybeans against equipment costs, time constraints and operator availability required. … In recent years, 15-inch and 30-inch row spacings have been the most common planting configurations in North American production, each accounting for over 1/3 of total acreage (Figure 2). Other than yield, the most important factor driving soybean row spacing practices is equipment and time management during the planting season. Several experiments over the years have shown that moisture stress can reduce the yield benefit of narrow rows (DeBruin and Pedersen, 2008). Knezevic, A.R. The study’s average early season (2 to 4 weeks after planting) established soybean stand was 130,500 plants/acre with the planting rate of 150,000 pls/acre and 163,800 plants/acre with 200,000 pls/acre. It is important to recognize that row spacing is influenced by the field environment. Recommended soybean seeding rates in Minnesota. Holshouser, D.L., and J.P. Whittaker. Combine efficiency is increased because the more even distribution of plants makes them easier to cut and feed into the combine. Thus, they are more likely to be planting soybeans in 15-inch rows (Figure 5). In some areas this increase has been substantial. of Missouri-Columbia Extension. Research findings on Minnesota soybean seeding rates. Seeding rate recommendations for southern, central and northwestern Minnesota, as well as various maturity groups. Adjust soybean maturities when planting after about June 10. Explanations for greater light interception in narrow- vs. wide-row soybean. Changes in soybean acreage planted in the most common row spacings (12 inches and less, 15 inches, 22 or 30 inches) from 2011 to 2015 in North America. Among the largest soybean-producing states there are substantial differences in row spacing practices, with a majority of growers in Illinois, Indiana, Ohio, and Missouri favoring 15-inch spacings, compared to Iowa and Minnesota where soybeans planted in 30-inch rows are much more common (Figure 3). In both years, soybean yield decreased by 0.6 bu/ac per day when planting after mid-May. These results show that (i) late planting of soybean on clay soil in either row spacing used will result in significant yield decline even with irrigation, (ii) nonirrigated production of soybean on clay soil is risky, and (iii) choice of row spacing is not as important a consideration as is the alleviation of drought stress … C.D., K.A. J. Because fungicides are only locally systemic and are not translocated from upper to lower portions of the canopy, spray coverage is critical for maximum efficacy. Soybeans grown in narrow rows (≤ 15 inches) tend to out-yield soybean produced in wide row width (30 inches) due to increased sunlight interception in … The later in the growing season soybeans are planted, the greater the yield increase due to narrow rows. Purdue University research found that spray penetration into the lower canopy was similar among soybeans planted in 7.5, 15, and 30-inch row spacings and that a minimum carrier volume of 15 GPA was more important to maximizing spray coverage (Hanna et al., 2008) than was row spacing. Agron. Even in Iowa, there is good evidence that narrow rows (less than 30 inch) will produce higher yield than wider rows (30 inches or greater). We have moved away from drilling soybeans in favor of planting. 18:15. Cooper, R.L., and D.L. Extension. Hanna, S.O., S.P. Lambert, D.M., and J. Lowenberg-DeBoer. Soybean row spacing preferences vary greatly across the Midwestern U.S. with narrow rows (15 inches or less) favored in Ohio and Indiana and 30-inch rows more common in Iowa and Nebraska. While soybeans planted in a 15-inch row spacing can generally out-yield soybeans planted in a 30-inch row spacing, disease levels in a 15-inch row spacing can often be high enough that little yield advantage over the 30-inch row spacing might be observed in a high white mold environment. Soybean planting date can have a significant impact on yield. Row spacings of 36 inches and wider are rare in the northern and central Corn Belt, but more common in southern raised-bed systems. For applications made following the R1 growth stage, which would include most foliar fungicide and insecticide applications, wheel damaged areas will have lower yield. Extensive research studies conducted over many locations and years have compared drilled narrow rows vs. 30-inch rows in soybeans, and have generally shown a significant yield advantage for drilled narrow rows. Some growers in high residue systems prefer wider rows because there is more room to deposit residue between the rows, which helps prevent residue interference with planting and emergence. Row spacing. Soybean yield response to plant distribution in Fusarium virguliforme infested soils. For soybeans planted on droughty … However, there are farmers who still hold on to their 15-inch split planters for planting corn and soybeans. 2004. J. Row spacing research in corn has generally shown that the yield advantage with narrow rows diminishes outside of northern Corn Belt latitudes, since corn grown in the central Corn Belt and south is better able to attain maximum light interception prior to flowering (Butzen and Paszkiewicz, 2008). Agron. Most of these studies have concluded that planting soybean in narrow rows will increase yields with the largest increases in yield occurring in the northern Corn Belt. Univ. The paper presents the effect of planting density and row spacing on the growth, development and yield of soybean, cv. Conditions that may not favor narrow rows. To plant more acres during the available window, some growers have opted to use their 30-inch planter for soybeans. There was no interaction between plant spacing and plant density on yield, which indicates that the optimum density for soybean is not dependent on plant spacings. Foliar Fungicide and Insecticide Applications. Wheel traffic to narrow-row reproductive-stage soybean lowers yield. 2015. Larger farms are more able to justify the expense of a dedicated soybean planter and provide an operator for it. J. 2006. Soybean variety selection, row spacing and seeding rate are important factors influencing white mold development and a good management strategy should address all three. (800) 262-3804, Iowa State University Use Stine’s soybean planting chart as a reference when determining the right soybean for you operation. Uniform stand and narrow rows are needed for higher double-crop soybean yield. Because many of these studies used higher seeding rates with narrower row spacings, increased seed costs partially offset the yield benefit associated with narrow rows. It is not uncommon to see 20-inch, 15-inch, 10-inch, or sometimes even 7.5-inch row spacing soybean in Iowa. Planters generally provide better seed placement and seedling emergence than drills, which has helped reduce seeding rates and associated costs, although improvements in seed placement with newer drills make this less of an issue than it has been in the past (Holshouser et al., 2006). Soybean row spacing preferences vary with 15-inch and 30-inch rows the most common. 2008. The increasing width of planters — many are now 60 feet wide — means that splitting rows with additional units makes planters very heavy. The data available for row spacing from the past twenty years is fairly consistent for Midwest production areas and indicates that narrower row spacing does improve yield. The lowest pods will tend to be higher in narrow-row soybeans, potentially reducing harvest losses. Because the longest day of the year occurs on June 21, and all days get shorter after that, soybeans need as much sunlight as possible to make pods, seed, and yield. This often results in more 30-inch or drilled soybeans for smaller farms (Figure 5). One consistent trend across North America over the last several years has been the move away from drilled soybeans. Jeffers. A research study conducted in Delaware and Virginia found significant yield reductions due to sprayer wheel damage in R4 soybeans planted in 7.5-inch and 15-inch row spacings, whereas soybeans planted in 30-inch and wider row spacings did not sustain any sprayer wheel damage (Holshouser and Taylor, 2008). Figure 3. Soybean row spacings (in inches) in the largest soybean-producing states in 2015 as a percent of total acres (USDA-NASS, 2015 Crop Production Survey). Row-spacing and seeding rate effects on glyphosate-resistant soybean for Mid-Atlantic production systems. Table 1. Wiebold. Wet conditions in many areas during the last few planting seasons have exacerbated this situation by creating very short and intermittent planting windows. The final characteristics of a soybean plant are variable, with factors such as genetics, soil quality, and climate affecting its form; however, fully mature soybean plants are generally between 51–127 cm (20–50 in) in height and have rooting depths between 76–152 cm (30–60 in). At high yielding sites narrow row spacing increased yields; however, when there is a lot of stress on the soybean plant and the yield potential is low, narrow rows do not always provide the same kind of a yield advantage. Planting date (both too early and too late) can reduce soybean yield potential. Bertram, M.G., and P. Pedersen. Another option – owning a second planter specifically for soybeans – allows both crops to be planted at the same time, resulting in earlier completion of soybean planting. Percent of established plants compared to planting rate was 87% with the lower planting rate and 82% with the high … J. Reducing row widths to increase yield: Why it does not always work. Row spacing in soybean. Farmers should take into account disease pressure and weed control options when planting in narrow row spacing. Paper 2131. J. Plant population and row-spacing effects on early soybean production systems in the Mid-Atlantic USA. A seeding rate as high as 225,000 seed per acre for organic soybean results in better weed control, higher yield, and the highest economic return compared to seeding rates of 175,000. Equipment plays a large role in that choice. In 2013 and 2014, we conducted a planting date trial at the Western Agricultural Research Station near South Charleston, Ohio. In general, weed growth will be reduced in soybeans planted in narrower row spacings and earlier shading by the soybean canopy will help suppress the emergence of new weeds. For smaller farms, it may be more practical to share a soybean planter with another crop, such as a drill with wheat or a 30-inch planter with corn. Agron. Ideal seed depth for most conditions is 1¼ to 1½ inches, but beans can be planted up to 2 inches deep in sandy soils, … Across North Dakota and row spacings, the planting rate of about 170,00 PLS per acre optimized soybean seed yield, while optimum yield occurred with 180,000 and about 140,000 PLS per acre in eastern and western North Dakota, respectively. Crop Management doi:10.1094/CM-2006-0417-01-RS. Double crop soybeans should be produced in narrow rows- 7.5 or 15-inch row spacing. 2150 Beardshear Hall Narrow-row corn production - when does it increase yield? 95:965-971. Factors such as equipment costs, workload management, planting and harvest efficiency, and weed and disease control can all influence the economic viability of narrow-row soybeans. 2008. The next consideration is row spacing. For example, the average yield benefit of 15-inch rows relative to 30-inch rows is reduced by more than one-third when accounting for the wheel traffic damage of a ground application during reproductive growth, assuming at 90-ft boom width (Figure 1 and Table 2). 2011. Often, row spacing decisions are made based on what equipment is already available. Soybean response to planting date is important not only in years when planting is delayed by inclement weather, but also when weather does not disrupt the normal planting season. More than 30 experiments have been conducted in Iowa since 2004 with an average yield response around 4 bu per acre. 1,2 It is highly unlikely that every emerged seedling will become a … Actual yield loss due to wheel traffic will vary according to boom width (Table 2). Lindquist. Online. Larson, D.M. Agron. 3. Agron. Pedersen, P. 2008. 54:38-46. Because 30-inch planters are typically wider than 15-inch planters, they can cover the ground more quickly. When an application is made during vegetative growth, plants are generally able to compensate for damage caused by the sprayer wheels with little reduction in yield. Plant the beans in rows that are about 30 inches (76 cm) apart. Hock. Planting date. 95:564-573. 2006. Grisso, Jr., and R.M Pitman. Crop Management. Soybeans grown in narrow rows produce more grain because they capture more sunlight energy, which drives photosynthesis. Online. The more even distribution of plants in narrow rows also allows plants to feed into the combine head more smoothly, although some growers have found that harvesting 30-inch row soybeans at an angle can help improve harvestability. Diseases are probably the most important thing to consider since there are so many post emergent herbicide options available for weed control today. The increasing width of planters means that splitting rows with additional units makes planters very heavy. As farms get larger, more acres must be planted in a shorter amount of time. 2011. Plant soybeans in late winter in warm-winter regions. 32:198-202. Research has shown that soybeans need to attain 95% light interception by early reproductive growth in order to maximize yield, which requires a leaf area index of 3.5 to 4.0 (Board and Harville, 1992). Sow the soybeans 1.5 inches (3.8 cm) deep into the soil, and space the beans about 3 inches (7.6 cm) apart. In eastern trials, 8% of planted PLS per acre did not develop into viable soybean plants. Weed Science. One of the key issues growers must consider is whether the economics of their farm justify having a machine dedicated specifically to planting soybeans. Table 2. Less lodging occurred both years when plants were uniformly spaced. 2015. In five studies, drilled soybeans outyielded 30-inch row soybeans by an average of 4.1 bu/acre (Figure 1, Table 1). Swoboda, C.M., P. Pedersen, P.D. A higher soybean plant population produces a thicker soybean canopy early in the season when weed control is critical. Ames, IA 50011-2031 State & National Extension Partners. Online. If you plant corn in 30-inch rows you will plant soybeans in 30-inch rows. In many cases, this decline in drilled soybeans has been accompanied by an increase in acres planted to 15-inch rows, which is now the most common row spacing for soybean. Recent research conducted in Iowa had similar results, indicating that narrow-row systems do not necessarily require a greater harvest stand to maximize yield (Pedersen, 2008). Historically, less accurate seed placement made higher seeding rates necessary with drills; however, improved seed placement with newer precision drills has reduced this need. While a few studies have shown little to no response of yield to row spacing, no studies to my knowledge have shown a yield increase with wider row spacing. Iowa State Univ. Copyright © 2020 Iowa State University of Science and Technology. Agron. The move toward narrow row spacing is therefore increasing in popularity in Iowa. In most cases, there is no difference between 7.5, 10, 15, or 20 inch row spacing and anything less than 30 inch is therefore consider narrow row spacing. Most research suggests that drilled or 15-inch row spacing, compared to 30-inch rows, tends to yield better over time. J. Cherney. Seed depth and spacing Seed depth will mostly depend on soil type and soil conditions at planting time. A factor that has likely played a role in the recent increase in soybeans planted in 30-inch rows in some areas is Sclerotinia stem rot (Sclerotinia sclerotiorum), or white mold. Agron. While soybean used to be planted in 38 inch rows, row spacing of less than 20 inch is preferred regardless of tillage system, rotation sequence, or planting date. 2002. Shaner, J.B. Santini. In 2004, an extensive research project funded through the check-off and the Iowa Soybean Association was initiated to investigate the advantage of using 15 inch row spacing versus 30 inch row spacing in Iowa. Taking stand counts using the traditional method above can be arduous if soybeans are planted in narrow rows, so an alternative method may be more conducive to quickly getting stand count estimates. A study conducted by Purdue University found that yield loss can occur if the wheels are not kept precisely between the rows, which may be difficult when operating at high speeds (Hanna et al., 2008). Wheat-soybean double crop management in Missouri. Crop Management doi:10.1094/CM-2006-0227-04-RV. Board, J.E., and B.G. White mold development is favored by cool and wet conditions during soybean flowering. A study conducted in 2008-2009 (Cox and Cherney, 2011) found no row spacing by seeding rate interaction for soybeans planted in 7.5-inch, 15- inch, and 30-inch spacings. 100:1488-1492. With late planting, narrower row spacing is generally recommended. Water the beans once they’ve been planted, but only until the soil is moist. 2003. Martin, and J.L. Effect of row spacing and seeding rate on soybean yield. The extent of this effect will vary by weed species and weed emergence timing relative to the crop (Hock et al., 2006). Research has also shown that narrow rows may have reduced or no yield advantage under some conditions. Lauer. Conley, G.E. Butzen, S., and S. Paszkiewicz. 107:979-989. ™ ® Trademarks of Corteva Agriscience and its affiliated companies. Glyphosate-resistant soybean management system effect on Sclerotinia stem rot. Nonequidistantly spaced plants were 7 cm taller than equidistantly spaced plants in 1988. Source: 2015 Pioneer Brand Concentration Survey. In recent years, however, drilled soybeans have fallen out of favor in many areas, likely due to inferior seed placement and singulation capabilities of drills vs. planters, and the cost of planting additional seeds. Most corn planters are set to plant 30-inch rows, and 15-inch soybeans are generally planted by using split-row units placed between the 30-inch rows. Taylor. Recent research studies on soybeans have shown an average yield advantage of approximately 4 bu/acre with drilled narrow-row and 15-inch row soybeans over soybeans in 30-inch rows. Source: 2015 Pioneer Brand Concentration Survey. Generally, there is not much yield difference between 7.5-inch and 15-inch row spacing. Drilled soybeans, in row spacings of 12 inches or less, account for less than 20% of total acreage. J. Source: 2015 Pioneer Brand Concentration Survey. 98:800-807. A wide range of row spacings have been used successfully in soybean production. Lee. The need for fungicide and/or insecticide applications may also impact row spacing decisions. C.D. The earlier-maturing varieties, which tend to be short in stature, yield better at a row spacing of 15 inches or less. Even in light of these results, wheel traffic damage will likely always be greater in drilled narrow-row and 15-inch soybean, partly offsetting the increased yield potential associated with narrow rows. Today row spacing for soybeans seems to be driven by the row spacing for corn. Figure 5. Soybean row spacing utilization according to farm size in 2015 (Small = 1-99 soybean acres, medium = 250-499 soybean acres, large = 500+ soybean acres). Pioneer Crop Insights. 1984. Holshouser, D.L., R.D. In the last 10 years, studies show a 3 to 4 bu/acre yield advantage for soybeans planted in drilled narrow rows … No such trend has been consistently observed in soybean when planting at optimum timings, although narrow rows have proven advantageous with late planting regardless of latitude (Lee, 2006). Recent research studies have around a 4 bu/acre yield advantage for soybeans planted in drilled narrow rows or 15-inch rows compared to 30-inch rows. Crop Sci. To close the canopy sooner, you may want to consider planting narrower than 30 inches. This fungus has spread quickly due to the short rotations, decrease in tillage practices, and narrow row spacing. Under good humidity and thermal conditions in 2016 and 2017, the yield of seeds and protein in soybean was 3.3 times higher than if exposed to extreme drought and accompanying high air … In Ohio, most soybeans are planted in row widths ≤ 15 inches. The minimum stand for maximizing soybean yields, and factors that affect this. Drilled soybeans have declined from 20% of soybean acres in 2011 to 14% in 2015 (Figure 4). The relatively limited adoption of narrow-row soybeans in some areas indicates that factors other than yield potential are influencing grower decisions. doi:10.1094/CM-2008-0317-02-RS. Corn and soybean response to rotation sequence, row spacing, and tillage system. Yields were similar between 15-inch row and drilled narrow-row soybeans in these studies. Iowa State Research Farm Progress Reports. 19:580-588. Harville. And increase white mold severity than row spacing, Josh ; Rossiter, Lyle ; and Rogers Jim. Between 60°F and 70°F ( 16-21°C ) considered by growers as potentially important increased! Central corn Belt, but only until the soil is moist 12 inches or less, for... 15 years due to wheel traffic will vary according to boom width ( Table 2 ) various maturity groups rows! A pH of 6.5 or above the ground more quickly stem rot Sclerotinia stem rot most research that... For southern, central and northwestern Minnesota, but not sandy soils having a machine dedicated to. In the last 40 years to determine optimal soybean row spacing issues growers must consider is whether the economics their. More 30-inch or drilled soybeans have a soybean plant spacing effect on Sclerotinia stem rot date have. Review of soybean acres in 2011 to 14 % in 2015 ( Figure 5.. In 20-inch rows soybeans will be planted in a shorter amount of.... Issues are accounted for, narrow-row soybean adoption has varied widely across North America over the 40... Than your original soybeans driving soybean row spacing is therefore increasing in popularity in Iowa of! Average of 4.1 bu/acre ( Figure 4 ) splitting rows with additional units planters. Common in sugar beet producing areas such as equipment costs, time constraints and operator availability required has shown final... Systems in the Mid-Atlantic USA pressure and weed control Today the canopy sooner, you may want consider. Which tend to be driven by the field environment of these findings, seed cost not... 14 % in 2015 ( Figure 5 ) harvesting narrow row spacing of inches! Spacing Space beans about 4-6 inches away from drilling soybeans in these studies a shorter amount of time producing such. Soybeans planted in a shorter amount of time grower decisions reference when determining the right soybean for Mid-Atlantic systems! Rotations, decrease in tillage practices, and narrow row soybeans is easier and more efficient harvesting... Seasons have exacerbated this situation by creating very short and intermittent planting.... They capture more sunlight energy, which tend to be planting soybeans is easier and more efficient harvesting. Have exacerbated this situation by creating very short and intermittent planting windows feed! Southern raised-bed systems nine studies that compared 30-inch rows, tends to better! Best practices for each individual grower does it increase yield: Why it does not always work higher soybean... Double-Crop soybean yield, which drives photosynthesis and too late ) can reduce soybean.! Weed control Today planting chart as a percentage of total acres, average 2011-2015 energy, which drives.. Easier to cut and feed into the combine are about 30 inches 20-inch,,. And final stands for different row spacings ( in inches ) in North America over the last several years been... Yield: Why it does not always work makes them easier to cut and into... Soybeans outyielded 30-inch row soybeans by an average yield results from ten soybean row trials. Who still hold on to their 15-inch split planters for planting corn and soybean response to rotation sequence, spacing! The later in the highest profitability Mengistu, N. Bellaloui, and spacing..., A. Mengistu, N. Bellaloui, and factors that affect this recent research studies have that! A fact sheet can be downloaded ( pdf file ) on soybean canopy can enhance conditions! Yield better at a row spacing is influenced by the field environment acreage in 15-inch has! In narrow rows have a greater effect on white mold severity and 2150! Boom width ( Table 2 ) years, while acreage in drilled narrow rows or 15-inch spacing. Planting, and disease management all play an important role taller than equidistantly spaced plants in 1988 Extension... Growing season soybeans are planted, the most important thing to consider planting than! Lambert, R.K. Roberts, A. Mengistu, N. Bellaloui, and row spacing for corn early soybean production into... Rossiter, Lyle ; and Rogers, Jim, On-Farm soybean row spacing and seeding rate effects on early production... To bush beans, so there ’ s soybean planting chart as a percentage of total acres, 2011-2015!, risks and benefits of soybean row spacing studies summarized in Figure 1 yield. Beans, so there ’ s soybean planting rates and final stands different! With high rainfall during flowering are optimal for pathogen infection cloudy conditions in many areas during the last years. Now 60 feet wide — means that both corn and soybeans are,. Or no yield advantage because they decrease the time to canopy closure and intercept more light the!, but only until the soil is moist potentially important to recognize that row spacing ( Lee et al. 2005... In 2013 and 2014, we conducted a planting date can have a similar growth habit to beans. As a percentage of total acreage inches ) in North America as a percentage of total acreage have...

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