235 – 243 of 737 Results
Preemergence Herbicide Stewardship--ISU
The advent of herbicide-resistant (HR) weeds has increasingly led to the recommendation that producers should use preemergence (PRE) or soil-applied herbicides to increase the mode-of-action variability in the battle to control HR weeds. PRE herbicides are applied to the soil to prevent weeds seeds from germinating and emerging. Thus, the soil is the interceptor of these herbicides vs. the plant which is the interceptor of herbicides that are applied to emerged and growing weeds either before or after crop planting and emergence. Dr. Bob Hartzler of Iowa State Univ. provides details about how PRE herbicides will react with soil and perform based on that reaction.
Row Crop Plant-Back Intervals for Common Herbicides--Univ. of Ark.
The Univ. of Arkansas published "Row Crop Plant-Back Intervals for Common Herbicides" (MP 519) and has published the same information for soybeans in MP44. The information in these publications consists of the labeled plant-back restrictions for herbicides that are used on six major crops and soybeans in the Midsouth.
Using 2,4-D and Dicamba on Tolerant Crops--Purdue Univ.
The Reference publication from Purdue University provides facts regarding the use of auxin herbicides on soybeans that are tolerant of these materials.
Soil pH--Mosaic Crop Nutrition
A narrative discussion of soil pH is presented by the The Mosaic Company.
21-2019 Shankle Effect of Cover Cropping Systems on Dryland Soybean Plant-vigor, Growth, and Yield Annual Report
Studies are being conducted at the Pontotoc Ridge-Flatwoods Branch Experiment Station to evaluate the effects the different cover cropping systems on soybean growth/development and yield. Also, the effects on “soil health” (physical characteristics, microorganisms, soil moisture, etc…) are being evaluated. Standard agronomic management practices for dryland production in the area are being employed. Treatments include 5 cover crops, 3 fertilizer treatments, and 2 soybean planting times.
45-2020 Herbicide Efficacy and Economic Return as Affected by Precision Agriculture Technology Annual Report
Field experiments were conducted across three sites in Mississippi in 2018 to evaluate the effect of carrier volume and spray quality on non-dicamba-resistant soybean response to a sublethal dose of dicamba. Treatments consisted of dicamba at 5.6 g ae ha-1 plus glyphosate at 8.7 g ae ha-1 (equivalent to 1% of recommended use rate) applied to soybean at the R1 growth stage using a pulse-width-modulation (PWM) sprayer calibrated to deliver 140, 105, 70, 35, 14, or 7 L ha-1. Each carrier volume was applied using either TT11002 or XR110015 nozzles, which resulted in approximately Fine and Coarse spray qualities, respectively.
44-2019 Dicamba Volatility Under Field Conditions annual report
Although dicamba tolerant crops can provide an effective weed management option, risk of dicamba off-site movement to sensitive crops is a concern (Foster et al, 2019). One such method of off-site movement is through volatility, or the physical change of a liquid into a gas. Dicamba is one post-emergence herbicide that, when moved off target, can result in severe damage to sensitive crops, like soybean. With the release of dicamba tolerant crops, many new premixes are beginning to include dicamba as one mode of action. This study was conducted to compare volatility and herbicide vapor movement of new dicamba premixes and additives.
33-2019-Developing Improved Soybean Lines for Seed Composition, Quality, and Heat Tolerance in Mississippi Annual Report
Improvement of soybean seed composition, including protein, oil, fatty acids, sugars, and minerals is important. Our previous research identified breeding lines with heat-tolerance and high seed quality, including seed protein and germination. Thus, this project focused on phenotyping seed quality traits, including seed protein, oil, fatty acids, sugars, minerals, and other seed quality traits in a previously developed recombinant inbred line (RIL) population segregating for heat tolerance.
32-2019 Effects of Harvest Aids on Seed Composition and Seed Damage in Soybean Grown in Mississippi
The transition to the use of the Early Soybean Production System in the Midsouth resulted in higher seed yields. However, with the shift towards the use of early-maturing soybean cultivars in the mid-South, the incidence of green stems, green pods, green leaf retention, and late-season weed infestation increased, thereby complicating harvest, reducing seed quality, and penalizing producers for increased seed moisture, foreign material and damaged seed at the elevator. Therefore, the use of harvest aids to defoliate green tissues in order to achieve uniformly dry plants at harvest, improve harvest efficiency, increase yield, reduce elevator discounts and increase net returns is critical.