Life Sciences Commons^™

Management Strategies For Double-Crop Soybean Planted After Wheat, D. S. S. Hansel, J. Kimball, I. A. Ciampitti

Kansas Agricultural Experiment Station Research Reports

Double-crop (DC) soybeans (Glycine max L.) are gaining popularity as an alternative system to intensify productivity without expanding the farming area and can potentially increase net return. However, the DC soybean system faces many challenges such as late planting, which decreases yield potential. A study was conducted in four site-years in Ashland Bottoms, KS, during the 2016 and 2017 growing seasons. In both years, the soybean variety planted was Asgrow 4232 (MG 4.2). The soybean was planted right after two different wheat harvest timings (Study 1, early-wheat harvest 18–20% mois­ture; and Study 2, conventional-harvest 13–14% moisture). Seven treatments were …

Response Of Soybean Grown On A Claypan Soil In Southeastern Kansas To The Residual Of Different Plant Nutrient Sources And Tillage, D. W. Sweeney, P. Barnes, G. Pierzynski

Kansas Agricultural Experiment Station Research Reports

The residual from previous high-rate turkey litter applications, which were based on nitrogen (N) requirements of the previous grain sorghum crop, increased 2018 soybean yield more than that obtained from the residual of phosphorus (P)-based turkey litter applications (low rate), commercial fertilizer, or the control. Even though early soybean growth was sporadically affected by residual treatments, the dry matter production at the R6 growth stage tended to be where the N-based litter was applied.

Kansas Field Research 2019

Kansas Agricultural Experiment Station Research Reports

Research from Kansas State University experiment fields on crop varieties, tillage, irrigation, weed management, and fertilizers.

Historical Soybean Study: Grain Filling × Nitrogen Fixation, S. Tamagno, I. A. Ciampitti

Kansas Agricultural Experiment Station Research Reports

Genetic gain is characterized by comparing the performance of genotypes from a different year of release. Historic studies are useful to understand changes in yield-related traits that also contribute to yield potential. This study aims to quantify yield improvement for soybean through a set of seven genotypes with different years of release, and their respective numerical components, with a focus on final seed weight generation under two different nitrogen (N) conditions. Changes in biological N fixa­tion (BNF) were quantified during the seed-filling period (SFP). Non-linear models were fit to the data to characterize seed weight and BNF changes throughout the …

Controlling Soil-Borne Disease In Soybean With A Mustard Cover Crop, G. F. Sassenrath, C. Little, K. Roozeboom, X. Lin, D. Jardine

Kansas Agricultural Experiment Station Research Reports

Charcoal rot is a soil-borne disease that is prevalent in southeast Kansas. The disease infects multiple crops, including soybean, and causes yield reductions. A high-gluco­sinolate mustard with biofumigant properties reduced the population levels in soil and in soybean plants of the fungus (Macrophomina phaseolina) that causes charcoal rot. In this study, management practices that incorporate use of mustard as a cover crop in soybean production systems were tested. Results indicate that tillage increases the char­coal rot fungus. The mustard cover crop was tested in field studies for its impact on soil health, fungal disease and propagules, and soybean …

Tillage And Nitrogen Placement Effects On Yields In A Short-Season Corn/Wheat/Double-Crop Soybean Rotation, D. W. Sweeney, D. Ruiz-Diaz

Kansas Agricultural Experiment Station Research Reports

In 2018, adding nitrogen (N) greatly improved average wheat yields with about a 10% increase with knife compared to broadcast application methods. Even though tillage did not affect wheat yields, soybean yield was about 10% greater with no-till.

Influence Of Soybean Planting Date On Sudden Death Syndrome And Soybean Yield, E. A. Adee, C. R. Little, I. A. Ciampitti

Kansas Agricultural Experiment Station Research Reports

Sudden death syndrome (SDS) is a disease caused by the soilborne fungus Fusarium virguliforme. This fungus prefers wet conditions and thus is usually most severe in irri­gated fields. Sudden death syndrome tends to be most severe on well-managed soybeans with a high yield potential. It also tends to be more prevalent on fields that are infested with soybean cyst nematode (SCN) or planted early when soils are wet and cool. Historical yield losses from this disease are generally in the range of 1–25%.

Soybean planting dates have been moving increasingly earlier in much of the soybean growing region, including …