A5048217550- Crop Yield and Soil Fertility
- Rice Cultivation and Yield Improvement
- Soil Carbon and Nitrogen Dynamics
- Climate change impacts on agriculture
- Tree Root and Stability Studies
- Soil Mechanics and Vehicle Dynamics
- Genetics and Plant Breeding
- Soybean genetics and cultivation
- Soil and Water Nutrient Dynamics
- Wheat and Barley Genetics and Pathology
- Hydrology and Watershed Management Studies
- Plant nutrient uptake and metabolism
- Soil erosion and sediment transport
- Plant Water Relations and Carbon Dynamics
- Agronomic Practices and Intercropping Systems
- Irrigation Practices and Water Management
- Plant responses to water stress
- Plant Physiology and Cultivation Studies
- Plant Disease Management Techniques
- Agricultural Economics and Policy
- Greenhouse Technology and Climate Control
- Bioenergy crop production and management
- Forest Biomass Utilization and Management
- Seedling growth and survival studies
- Seed Germination and Physiology
Quality Research
2022-2024
Agricultural Research Service
2022-2023
Iowa State University
2012-2021
The Ohio State University
2014
Dakota State University
2014
University of Missouri
2014
University of Minnesota
2014
Lincoln University - Pennsylvania
2014
Michigan State University
2014
University of Nebraska–Lincoln
2005
Abstract Increasing temperatures in the US Midwest are projected to reduce maize yields because warmer hasten reproductive development and, as a result, shorten grain fill period. However, there is widespread expectation that farmers will mitigate yield losses by planting longer season hybrids lengthen Here, we ask: (a) how current hybrid maturity length relates thermal availability of local climate, and (b) if shifting response warming climate. To address these questions, used county‐level...
Abstract Winter cover crop performance metrics (i.e., vegetative biomass quantity and quality) affect ecosystem services provisions, but they vary widely due to differences in agronomic practices, soil properties, climate. Cereal rye (S ecale cereale ) is the most common winter United States its hardiness, low seed cost, high production. We compiled data on cereal metrics, properties across eastern half of States. The dataset includes a total 5,695 observations 208 site-years between...
Variability in soil organic carbon (SOC) results from natural and human processes interacting across time space, leads to large variation the minimum difference SOC that can be detected with a particular experimental design. Here we report unique comparison of detectable differences (MDDs) SOC, estimated times required observe those MDDs north central United States, calculated for two most common experiments: (1) between treatments, e.g., moldboard plow (MP) no-tillage (NT), using randomized...
Corn ( Zea mays L.) N use is of continued interest due to agronomic performance and environmental issues. This 2‐yr study evaluated era hybrid response fertilizer nitrogen (FN) rate in a factorial arrangement one popular per five decades (1960–2000 eras) rates (0–224 kg ha −1 ). An additional was grown at 168 . Hybrid productivity efficiency (NUE) increased across the eras, but not between 1980 1990 eras. Grain yield (GY) 65% total plant biomass 43%, however, uptake (PNU) only 19% higher for...
Controlled drainage (CD), sometimes called water management, is a practice whereby the system outflow managed during specific periods to retain more in field. Although CD has been shown reduce downstream nitrate-N (NO3--N) load, seasonal patterns have less consistent which can potentially impact effectiveness of conservation practices. The main objective this study was assess regional and conventional free (FD) on flow load. Using experimental data from ongoing historical experiments across...
A component of the USDA ARS Long-Term Agroecosystem Research (LTAR) network is a Common Experiment standardized across all sites. This collection contains protocols for biophysical metrics collected in Experiment.
The relationship between collared leaf number and growing degree days (GDD) is crucial for predicting maize phenology. Biophysical crop models convert GDD accumulation to numbers by using a constant parameter termed phyllochron (°C-day leaf-1) or appearance rate (LAR; oC-day-1). However, such important values are rarely estimated modern hybrids. To fill this gap, we sourced analyzed experimental datasets from the United States Corn Belt with objective (i) determine two types of models:...
ABSTRACT Inoculants containing Bradyrhizobium japonicum are available for soybean [ Glycine max (L.) Merr.] production but may not be necessary in fields where previously has been produced. The objective of this study was to determine yield response and probability an economic return from inoculants with a recent history production. Fifty‐one inoculant products were evaluated experiments ( n = 73) conducted Indiana, Iowa, Minnesota, Nebraska, Wisconsin between 2000 2008. Inoculant similar...
The important questions about agriculture, climate, and sustainability have become increasingly complex require a coordinated, multifaceted approach for developing new knowledge understanding. A multistate, transdisciplinary project was begun in 2011 to study the potential both mitigation adaptation of corn-based cropping systems climate variations. team is measuring baseline as well change system9s carbon (C), nitrogen (N), water footprints, crop productivity, pest pressure response...
Core Ideas Three distinct site‐groupings resulted, with different recommended planting windows. Two windows were developed for each site‐grouping: 98–100% grain yield or 95–100% yield. The north‐central and northeast grouping had the earliest window to maximize Farmers use a suite of management practices optimize corn ( Zea mays L.) yield, including at appropriate times their location. Research on dates across years has tended categorical analysis determination recommendations by identifying...
Core Ideas We compared 1960 and 2000 era hybrid DM macronutrient partitioning. Similar DM, N, P, K accumulation patterns occurred for hybrids. Nutrient concentrations (g kg −1 ) were lower than Plant component contents (kg ha greatest Greater modern nutrient uptake was mainly due to greater yield. As corn ( Zea mays L.) hybrids change over time, with increased use of different plant components feed, bedding, energy production, it is important know distribution within plants how concentration...
The response of corn ( Zea mays L.) grain yield (GY) to plant population or seeding rate is well studied. Population recommendations have been previously made by amassing numerous data points find the optimum population. However, has not yet linked with suitability rating (CSR), a measure soil productivity. We evaluated effect respect CSR system on GY. study was performed across 33 site‐years in Iowa from 2006 2009. Seeding rates ranged 49,400 118,560 seeds ha −1 . Two versions were...
Climate smart agricultural practices have received considerable attention recently for their potential climate change mitigation through sequestering atmospheric carbon. Despite the enthusiasm practices, there is limited evidence they are more effective at removing carbon from atmosphere and storing it in soil than current practices. We hypothesized that a field with aspirational (ASP) (i.e., no-till corn-soybean-wheat-hay rotation cover crops) would accumulate organic (SOC) versus...
The most important ecosystem service from agriculture is the provision of food, fiber, feed, and fuel. These outputs system are almost always a function amount biomass accumulated above soil surface (except with root crops). Measuring aboveground necessary for determining plant material allocated to vegetative reproductive organs. these organs will vary some degree each year due interactions among genetics, environment, stressors. vegetative-to-reproductive ratio across treatments,...
Core Ideas Evaluating corn dry matter and macronutrient accumulation patterns across era hybrids is necessary to understand changes in plant nutrient requirements effects on timing fertilization management. Era differed accumulation, with differences content mainly related production. Dry P was linear, however, N K slowed during the reproductive stages. Although absolute production greater most recent hybrids, relative maximum N, P, rate (cumulative growing degree unit‐based) remained same...
Abstract Drainage water recycling (DWR) involves capture, storage, and reuse of surface subsurface drainage as irrigation to enhance crop production during critical times the growing season. Our objectives were synthesize 53 site‐years data from 1996 2017 in midwestern United States determine effect DWR using primarily subirrigation on corn ( Zea mays L.) grain yield variability identify precipitation factors at key stages development (V1–V8, V9–VT, R1–R2, R3–R4, R5–R6) that correlated an...
Controlled drainage (CD) is a valuable management practice for reducing volume and nutrient loss, but its impact on corn (Zea mays L.) production not completely understood. The objectives of this study were to investigate the regional effect CD grain yield compared free (FD), factors influencing response CD, provide recommendations optimizing under identify future research needs poorly drained soils with subsurface systems. This synthesis included data collected from 13 field sites where was...
Soybean [ Glycine max (L.) Merr.] producers across the United States are confronted with significant economic losses annually from hail. Plant injury and yield loss associated defoliation node or stand due to bruising breaking of plant stems The correlation leaf is well defined; however, limited information exists relative whole loss. This research was designed simulate severe hail by quantifying influence removal at different development stages on soybean seed composition. Research...
Abstract This paper describes a multi-site and multi-decadal dataset of artificially drained agricultural fields in seven Midwest states North Carolina, USA. Thirty-nine research sites provided data on three conservation practices for cropland with subsurface tile drainage: saturated buffers, controlled drainage, drainage water recycling. These utilize vegetation and/or infrastructure to minimize off-site nutrient losses retain the landscape. A total 219 variables are reported, including 90...
Strobilurin fungicides are effective against a wide range of foliar fungal diseases on several crops and may offer additional physiological benefits, including plants staying green longer than normal (the “stay-green effect”). It has been hypothesized that the stay-green effect extend grain fill period leading to increased yield due dry matter accumulation. We investigated pyraclostrobin fungicide applied at tasseling disease suppression, stalk rot severity, leaves in upper canopy,...
Thermal time (TT) is an agro‐climate index widely established and used in predicting plant development based on temperature. This a powerful tool for measuring multi‐faceted changes temperature occurring from climate change. In the present study, TT was calculated entire frost‐free period individual spring, summer, fall seasons using growing degree day (GDD), general thermal (GTI), crop heat unit (CHU), stress (HSDD) models 1054 counties across 12 Midwest states daily basis 1950 to 2017. The...