217 – 225 of 715 Results
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.
28-2019 Crop rotations and risk management for Mississippi soybean producers
Crop rotations are economically significant on both the mean and variance of expected crop yields. This is because an effective crop rotation reduces year-to-year pest pressure, replenish soil nutrients, and increase plant vitality. Soybeans play a unique role in these rotation schemes by fixing atmospheric nitrogen into the soil. In the research, we study the role of crop rotations in farmers’ risk management decisions. Specifically, we aim to answer the question: as farmers face unknown future prices, unpredictable weather, and uncertain yields, how do crop rotations’ agronomic effects impact farmers’ optimal planting decisions? And beyond that: what is the economic value of optimizing crop rotations for a soybean farmer?
07-2019 Developing Future Agronomy Leaders through Day Camp and Individual Learning Projects Annual Report
Agronomy is a diverse field of study in plant and soil sciences which include external factors such as: entomology, genetics, physiology, biology and chemistry. Recent trends in undergraduate enrollment show many students prefer to specialize in a specific science rather than a generalist discipline like agronomy. As the number of applied-science agronomists decreases, we face a shortage of individuals with the knowledge to perform field diagnostics, soil nutrient management, develop overall farm management plans or to conduct research. As the number of professionally-trained field agronomist declines, having access to people that can answer day-to-day questions could become a serious issue. So this project objective is to develop an Agronomy Camp emphasizing hands-on training for young people.
58-2019 Management of Redbanded Stink Bug in MS Soybean Production System Annual Report
Focus of this project is to determine insecticidal efficacy of insecticides to control redbanded stink bugs in MS. All products and rates significantly reduced mixed populations of stink bugs compared to the untreated control at 5 and 8 DAT.
48-2019 Assessing Soybean Injury from Dicamba Applications Using Multispectral Imaging on a Small Unmanned Aerial Vehicle Final Report
This project developed a UAV digital and multispectral imaging system aiming at assessing non-DT soybean injury from dicamba sprayed at different growth stages and rates to evaluate the feasibility of this technique. This project also produced a protocol for how UAVs and multispectral imaging sensors can be used by soybean producers and consultants to effectively assess soybean injury from dicamba in fields for guideline data for them to assess and reduce the loss caused by the unwanted dicamba.