A5074735767- Crop Yield and Soil Fertility
- Soil Carbon and Nitrogen Dynamics
- Plant nutrient uptake and metabolism
- Genetics and Plant Breeding
- Soil Management and Crop Yield
- Soil and Water Nutrient Dynamics
- Legume Nitrogen Fixing Symbiosis
- Rice Cultivation and Yield Improvement
- Soybean genetics and cultivation
- Agronomic Practices and Intercropping Systems
- Weed Control and Herbicide Applications
- Wheat and Barley Genetics and Pathology
- Climate change impacts on agriculture
- Soil and Unsaturated Flow
- Bioenergy crop production and management
- Plant Micronutrient Interactions and Effects
- Soil Mechanics and Vehicle Dynamics
- Pesticide and Herbicide Environmental Studies
- Atmospheric and Environmental Gas Dynamics
- Agricultural Engineering and Mechanization
- Nematode management and characterization studies
- Genetic Mapping and Diversity in Plants and Animals
- Ruminant Nutrition and Digestive Physiology
- Turfgrass Adaptation and Management
- Remote Sensing in Agriculture
Purdue University West Lafayette
2015-2024
Louisiana State University
2022
Government of Canada
2022
Agriculture and Agri-Food Canada
2022
State Street (United States)
2007-2021
National Institute of Agricultural Science and Technology
2012
National Soil Erosion Research Laboratory
2010
University of Guelph
1990-2002
Culture Resource
1990
Mounting concerns over the cost and environmental impact of N fertilizer combined with progressively higher plant densities in maize ( Zea mays L.) production systems make progress use efficiency (NUE) stress tolerance essential. The primary objectives this 3‐yr field study were to (i) evaluate responsiveness, NUE, multiple modern genotypes using suboptimal, optimal, supraoptimal (54,000, 79,000, 104,000 plants ha −1 , respectively) three levels side‐dress (0, 165, 330 kg ), (ii) identify...
Abstract Increasing concerns about soil degradation with continuous corn ( Zea mays L.) production and a scarcity of scientific information regarding grown in rotation the diversity crops produced Ontario, prompted long term study on effect various crop rotations their interaction two tillage systems growth structure. Eight were established 1980 which included corn, six comprised 2 yr following another or sequence, alfalfa Medicago sativa L.). Each was divided into either conventional (fall...
Understanding nutrient balances in changing cropping systems is critical to appropriately adjust agronomic recommendations and inform breeding efforts increase efficiencies. Research determine the season‐long P, K, S uptake partitioning dynamics maize ( Zea mays L.) as affected by low, medium, high plant density (PD) N rate factors their interactions was conducted over four site‐years Indiana. Plant contents at maturity responded predominantly rate. Relative silking compared with those were...
Accurate prediction of phenological development in maize ( Zea mays L.) is fundamental to determining crop adaptation and yield potential. A number thermal functions are used models, but their relative precision predicting has not been quantified. The objectives this study were (i) evaluate the eight functions, (ii) assess effects source data on ability differentiate among (iii) attribute response across various temperature ranges. Data sets represent >1000 distinct hybrids, >50...
Few experiments have directly compared the long‐term effects of moldboard, chisel, and no‐till tillage practices on N 2 O emissions from predominant crop rotation systems in midwestern United States. This study was conducted 2004 to 2006 a experiment initiated 1975 Chalmers silty clay loam (a Typic Endoaquoll) west‐central Indiana. Our objectives were assess (i) (chisel [CP], moldboard plow [MP], [NT]), (continuous corn [ Zea mays L.] corn–soybean Glycine max (L.) Merr.]), × interaction soil...
Global food security must address the dual challenges of closing yield gaps (i.e., actual vs. potential yield) while improving environmental sustainability. Nutrient balance is essential for achieving global security. Historical (in distinct “Eras” from late 1800s to 2012) and geographical United States remainder World) changes in maize ( Zea mays L.) grain yields plant nutrient content (N, P, K) were characterized studies (>150) with known densities. At community scale, greater ratios...
Abstract The competing demands of increasing grain yields to feed a growing population and decreasing nitrogen (N) fertilizer use loss the environment poses grand challenge farmers society, necessitates achieving improved N efficiency (NUE) in cereal crops. Although selection for increased yield maize has NUE over time, present understanding physiological determinants its key components hampers design more effective breeding strategies conducive accelerating genetic gain this trait. We show...
• Sustainable agriculture is complex and includes multiple interdependent goals. Sound science innovation are the keys to sustainable agriculture, already delivering results. Greater investment needed in basics of agronomy, biotechnology, plant breeding ensure that farmers consumers everywhere benefit from technology. Farmers must receive support for implementing sustainability measures, especially light downward trend commodity prices.
Low fertilizer application rates for several decades have depleted soil nutrients in Sub-Saharan Africa (SSA) and contributed to relatively stagnant maize (Zea mays L.) yields. As is a staple crop, nutrient depletion has resulted major food insecurity. While one potential solution apply more nitrogen (N) fertilizer, previous studies SSA found yield responses be variable, likely because N often not the only limiting nutrient. This study aimed determine impact of consecutive applications on...
Quantifying historical changes in maize harvest index (HI), the fraction of above-ground biomass allocated to grain yield, can enhance our ability explain yield trends and estimate stover carbon inputs for sustainability assessments. However, HI genetic gain has not been primary focus previous era studies. The aim this study is knowledge gain. Our first objective quantify Bayer Crop Science Legacy hybrids investigate contribution breeding agronomic management. second develop a general-use...
Abstract Era studies are important to understand historical changes in maize ( Zea mays ) germplasm and estimate genetic gains, yet information for short‐season hybrids is limited. Here, we determine grain yield gain Bayer (100–105 days) investigate indirect made on 17 secondary traits, including components (kernel number, weight, shelling efficiency), quality traits (oil, protein, starch, ethanol, moisture, test weight). We evaluated 40 released from 1980 2020 across 18 environments the US...
Abstract Tillage systems need to be compared over an extended period of time determine their transitional and long‐term impacts on crop growth soil properties. A 15‐yr experiment established in 1976 reduced tillage with conventional fall moldboard plowing for production continuous corn ( Zea mays L.) a Maryhill silt loam (Typic Hapludalf). Corn plant yield properties were five systems: plow (fall mold‐board + spring secondary tillage), chisel secondary), plow, plow/secondary (spring no‐till....
Maximizing the environmental and economic benefits of cover crops partially depends on an accurate estimate N fertilizer requirement subsequent crops. Four trials involving crop, tillage, rate variables were conducted from 1992 to 1995 in southcentral Ontario well‐drained Typic Hapludalf soils. Rye ( Secale cereale L.), oilseed radish [ Raphanus sativus (L.) var. oleiferus Metzg (Stokes)], oat Avena sativa red clover Trifolium pratense L.) established after winter wheat Triticum aestivum...
Research attention to improving source and sink strength in maize production is requisite for enhancing yield. Improvement has been achieved with higher post-silking dry matter accumulation, whereas historical improvement mostly attributed increasing kernel number (KN) per unit area, part because KN known be more vulnerable abiotic stresses compared weight (KW). However, KW can also vary widely as it dependent on both genotype accumulation during the period. In order illustrate consequences...
Twin‐row planting systems in maize ( Zea mays L.) have been proposed as an alternative spatial arrangement that should theoretically decrease plant‐to‐plant competition, alleviate crop crowding stress and improve yields. Uncertainty remains, however, to whether twin rows are a feasible option increase plant densities grain Three hybrids (DKC62‐54, DKC61‐19, DKC57‐66) were grown from 2009 2011 evaluate the individual interacting effects of density (PD1 = 69,000; PD2 81,000; PD3 93,000; PD4...