A5083134374- Soybean genetics and cultivation
- Weed Control and Herbicide Applications
- Legume Nitrogen Fixing Symbiosis
- Rice Cultivation and Yield Improvement
- Soil Carbon and Nitrogen Dynamics
- Agronomic Practices and Intercropping Systems
- Pesticide and Herbicide Environmental Studies
- Plant responses to water stress
- Crop Yield and Soil Fertility
- Soil and Water Nutrient Dynamics
- Irrigation Practices and Water Management
- Insect Resistance and Genetics
- Polymer-Based Agricultural Enhancements
- Soil Management and Crop Yield
- Plant nutrient uptake and metabolism
- Research in Cotton Cultivation
- GABA and Rice Research
- Allelopathy and phytotoxic interactions
- Genetics and Plant Breeding
- Nematode management and characterization studies
- Plant responses to elevated CO2
- Cassava research and cyanide
- Insect Pest Control Strategies
- Seedling growth and survival studies
- Silicon Effects in Agriculture
Simplot (United States)
2021-2024
Mississippi State University
2013-2022
Delta Air Lines (United States)
2013-2022
Mississippi Delta Community College
2014-2022
Ashland (United States)
2019
Oklahoma State University
2019
Kansas State University
2017
Louisiana State University
2011
Louisiana State University Agricultural Center
2010
University of Arkansas at Fayetteville
2006-2009
Soybean [Glycine max (L.) Merr.] seed composition and yield are a function of genetics (G), environment (E), management (M) practices, but contribution each factor to not well understood. The goal this synthesis-analysis was identify the main effects G, E, M factors on (protein oil concentration) yield. entire dataset (13,574 data points) consisted 21 studies conducted across United States (US) between 2002 2017 with varying treatments all reporting composition. Environment defined as...
Drought is one of the major abiotic stresses that limit soybean production worldwide. This study was conducted to determine whether cultivars with divergent growth habits respond differently drought stress at vegetative stage regarding canopy reflectance, physiological, and gas exchange traits under controlled conditions. Soil moisture content positively correlated mid-day leaf water potential. Pooled over cultivar, photosynthesis stomatal conductance were highly potential, while Ci/Ca...
Growing conditions in the U.S. Midsouth allow for large soybean [ Glycine max L. (Merr.)] yields under irrigation, but there is limited information on planting dates (PD) and maturity group (MG) choices to aid cultivar selection. Analysis of variance across eight (2012) 10 (2013) locations, four PD, 16 cultivars (MG 3–6), revealed that genotype by environment (G×E) interaction accounted 38 22% total yield variability. Stability‐analysis techniques probability low were used investigate this...
Abstract Temperatures that vary spatially and temporally over the soybean growing areas affect seed yield quality. Five day/night temperature, 21/13, 25/17, 29/21, 33/25, 37/29°C, effects on total biomass, yield, quality parameters were investigated indeterminate (Asgrow AG5332, AG) determinate (Progeny P5333RY, PR) cultivars. The cultivar × temperature interaction was significant for protein, oil, palmitic acid, oleic linolenic raffinose, stachyose. Quadratic functions best described...
Rice ( Oryza sativa L.) cultivated with the direct‐seeded, delayed‐flood production system relies heavily on post‐emergence aerial application of N. The availability a controlled‐release N fertilizer suitable for preplant would offer rice growers an alternative N‐fertilization method and reduce costs fertilization. Our objectives were to determine grain yield uptake receiving incorporated polymer‐coated urea (PCU) compared applied preflood at five‐leaf stage characterize release two PCUs....
Environmentally Smart Nitrogen (ESN) is a polymer-coated urea fertilizer with potential to increase crop recovery of nitrogen (N). Our research objectives were characterize ESN N retention across time as affected by soil series, temperature, moisture, and incubation method. A rumen bag containing 38 44 mg was placed in 400 g soil, the amount remaining prills measured every 5 d for 40 d. Soil incubated at 25 °C 250 H2O kg−1 except experiments where temperature or moisture varied. linear three...
Planting date is one of the main factors affecting soybean (Glycine max [L.] Merr.) yield. Environmental conditions in US Midsouth allow for planting dates from late March through early July, and maturity groups (MGs) ranging 3 to 6. However, complexity interactions among date, MG, environment makes selection an optimum MG cultivar difficult. A regional 3‐yr study, conducted at eight locations with latitudes 30.6 38.9°N, MGs 6, was used examine relationship between relative yield day. The...
Temperature is the primary factor affecting morpho-physiological, developmental, and yield attributes of soybean. Despite several temperature soybean studies, functional relationships between physiology components are limited. An experiment was conducted to determine optimum for gas exchange using indeterminate (Asgrow AG5332, AG) determinate (Progeny P5333 RY, PR) growth habit cultivars. Plants grown outdoors were exposed 5 day/night treatments, 21/13, 25/17, 29/21, 33/25, 37°C/29°C, from...
The ability of soil tests to identify nutrient‐deficient soils and recommend fertilizer rates that optimize agronomic yield is essential for profitable soybean [ Glycine max (L.) Merr.] production. Our objectives were correlate relative Mehlich‐3 1 mol L −1 HNO 3 –extractable K trifoliolate‐leaf concentration at the R1 R2 development stage calibrate Mehlich‐3‐extractable K. Experiments established on silt loams 34 site‐years planted with a Maturity Group IV or V cultivar fertilized five...
Dense populations of glyphosate-resistant (GR) Italian ryegrass are problematic for spring burndown herbicide programs and crop establishment in the midsouthern United States. Two field studies were conducted to evaluate fall-applied residual herbicides control GR identify most effective application timing these herbicides. Fall applications clomazone at 0.84 1.12 kg ai ha −1 , pyroxasulfone 0.16 S -metolachlor 1.79 controlled ≥ 93% 180 d after application. Control from incorporated...
Greenhouse studies were conducted to evaluate the influence of nitrogen (N) sources [urea + N-(n-butyl) thiophosphoric triamide, NBPT (urease inhibitor) and polymer-coated urea (PCU)] rates on soybean root characteristics, nodule formation, biomass production two soil types (silt loam clay) commonly cropped in Mississippi. About 15% less belowground was produced clay than silt directly corresponding all other parameters including length, area, diameter, number. Pooled across N rates,...
Abstract Silicon has been reported to reduce drought stress on many crops, but limited studies have evaluated this effect with rice using calcium silicate slag from the phosphorus fertilizer industry as a source of Si. A greenhouse study was performed address issue. Four rates (0, 1,000, 2,000 and 4,000 mg/kg) two application methods (surface incorporation) were under moisture regimes (flood 50% field capacity) for mitigation in mineral soil that is typical production. Slag significantly...
Cumulative interception of photosynthetically active radiation (CIPAR) is a key factor affecting soybean [ Glycine max (L.) Merr.] yield. Under well‐watered conditions, differences in CIPAR across planting dates, maturity groups (MGs) and row spacing the US Midsouth could partially explain yield differences. Irrigated experiments were conducted for 2 yr at three locations Arkansas with four dates 16 cultivars (MG 3–6) using narrow (0.46–0.48 m) twin‐row (0.19–0.20 m twin rows on 0.96 beds)...
Soil testing is an important tool for estimating soil K availability and determining how much fertilizer must be applied to realize crop yield potential minimize costs. Our primary objectives were correlate relative rice ( Oryza sativa L.) with Mehlich‐3 1 mol L −1 HNO 3 extractable K, define sufficient whole‐plant concentrations at panicle differentiation (PD) early heading (HDG), calibrate K‐fertilizer rates in the direct‐seeded, delayed‐flood production system. Potassium rate experiments...
Poultry litter (PL) application to fields used produce leguminous crops has merit as a sound nutrient management practice. Our research objective was determine whether soybean [ Glycine max (L.) Merr.] fertilized with PL produced similar leaf tissue and seed concentrations grain yield equivalent P K rates supplied by commercial fertilizer (CF). Twelve trials were established between 2005 2010. treatments 29 39 (low) 58 78 (high) kg ha –1 . The low rate corresponded 1890 2894 49 77 76 106...
Seeding rate and N application strategies have been extensively researched for drill‐seeded, delayed flood rice ( Oryza sativa L.) production in the midsouthern United States. However, little economic analysis has performed to determine effects of seeding fertilization on high‐yielding, lodging susceptible cultivars. The purpose this research was effect multiple rates grain yield use data optimal management practices based evaluation returns. Studies were established Louisiana Mississippi...
This study was conducted to determine if root, shoot, and gas exchange traits of determinate indeterminate soybean cultivars respond differently soil water deficit. The effect deficit imposed 4 10 days after sowing on growth development parameters soybeans evaluated for 18 30 in experiment I II, respectively. At both seeding, nearly all physiological were inversely correlated with the moisture level, adverse effects drought stress more evident Progeny P5333RY than Asgrow AG5332. For...
Abstract Rice with enhanced tolerance to herbicides that inhibit acetyl coA carboxylase (ACCase) allows POST application of quizalofop, an ACCase-inhibiting herbicide. Two concurrent field studies were conducted in 2017 and 2018 near Stoneville, MS, evaluate control grass (Grass Study) broadleaf (Broadleaf weeds sequential applications quizalofop alone mixtures auxinic applied the first or second application. Sequential treatments at 119 g ai ha −1 labeled rates rice two- three-leaf (EPOST)...
Zinc deficiency symptoms have been observed on corn ( Zea mays L.) grown coarse‐textured, high‐pH soils in the Mississippi Delta. To correct deficiencies, many producers apply foliar Zn. Corn injury from Zn application has observed; however, it is not clear whether affects grain yield. Also, little information currently exists about ability of sources to increase tissue concentration. Therefore, purpose this study was determine effect source and rate injury, concentration, yield corn....
Rice ( Oryza sativa L.) is an important crop in the midsouthern United States. However, some high‐yielding cultivars are highly susceptible to lodging. The plant growth regulator, trinexapac‐ethyl (TE), has been shown decrease lodging upland cereal crops, but data scarce that demonstrate rice response TE. objective of this study was determine effect TE on height, lodging, and grain yield. Experiments were established at multiple locations during 2012 2013 growing seasons Mississippi....
Forage fertilization practices are changing because of poultry litter use restrictions and reduced NH 4 NO 3 availability. Our objectives were to compare bermudagrass [ Cynodon dactylon (L.) Pers.] yield N uptake among sources rates evaluate the influence N‐fertilizer source on volatilization. Four sources, pelleted (PPL), , urea, urea + ‐(n‐butyl) thiophosphoric triamide (NBPT) applied at 0 500 kg ha −1 yr common from 2006 2008. Measurements included dry matter total each 400 A semi‐open...
Abstract Water level declines in the Mississippi River Valley Alluvial Aquifer (MRVAA) are attributed largely to withdrawals for rice ( Oryza sativa L.) irrigation. This study was performed determine if alternative irrigation strategies could reduce withdrawal from MRVAA without having an adverse effect on yield and profitability. Research conducted at 19 on‐farm locations across Delta region of 2014 through 2016 effects water management practice, i.e., conventional flood via cascade (CONV),...
Soybean (Glycine max L.) seed is a major source of protein, oil, carbohydrates and other nutrients that are important for human animal nutrition. Producers have considered applying nitrogen (N) fertilizer to soybean crop maximize yield; however, its effect on composition not well understood. The objective this two-year (2015 2016) study was evaluate the effects N sources application rates (45, 90, 135 179 kg ha−1) two soil textures (clay silt-loam) in Mississippi. three included were urea...