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1. Nitrogen Managememt in Dryland Winter Wheat to Improve Grain Yield and ProteinMaximizing the yield along with adequate protein content in winter wheat is an emerging challenge for dryland wheat producers. Proper nitrogen (N) management with optimization of fertilizer application rate and timing might be a potential strategy to improve grain yield and protein. The objective of the study was to evaluate the effects of different N rates and application timing on grain yield and protein content of hard red winter wheat in Nebraska. Field study was carried out at four locations... D. Ghimire, B. Maharjan |
2. Enhanced Efficiency Phosphorus FertilizersPhosphorus (P) is essential for plants. However, first-year phosphorus fertilizer uptake by plants is low, resulting in economic and environmental impacts. Developments with P Enhanced Efficiency Fertilizer (EEF) sources show improved uptake efficiency and increased yield and/or crop quality, while reducing environmental risk. Research with EEFs (including organic acids, maleic itaconic copolymer, and struvite) all show these improvements, especially when: 1) soil test P concentrations are low,... S. Kobza, B.G. Hopkins |
3. Soil Carbon and Agroecosystem Benefits of Conservation Management and Perennial Bioenergy Crop ProductionConservation agricultural management practices and perennial bioenergy crops can increase soil organic C (SOC) stocks on marginal soils yet the time necessary to observe these benefits, as well as the upper limit of C storage isn’t known. Co-benefits often associated with SOC accumulation are positive effects on water and nutrient retention, soil microbial biomass and diversity and soil structure, resulting in better soil quality. However, interactions between nitrogen fertilizer, crop biochemistry,... C.E. Stewart, V.L. Jin, M.R. Schmer, R.B. Mitchell, C. Williams, G.L. Miner |
4. Sugarbeet Yield Response and Nitrate Leaching As Influenced by Nitrogen Management in Semi-arid ClimateFertilizer nitrogen (N) in irrigated sugarbeet production needs to be optimized to simultaneously increase yield and reduce nitrate leaching. In addition to adjusting N rate and application timing, there are available fertilizer technologies such as controlled- or slow-release N which may be beneficial for beet yield and reducing potential nitrate leaching. However, there are limited studies assessing the effectiveness of such fertilizers for sugarbeet in a semi-arid climate. The two-year experiment... D. Ghimire, B. Maharjan |
5. Soil Microbes Are Critical to Maintaining Soil Fertility in the Great PlainsSoil in the Great Plains is known to be susceptible to wind and water erosion due to moisture deficits throughout the region that limit soil organic matter (SOM) accumulation that helps form stable soil structure. Conservation management practices like reduced tillage are emphasized to maintain SOM that provides habitat for soil microbes to perform ecosystem services related to nutrient cycling and soil aggregation to increase resistance to erosion and maintain fertile topsoil. Soils under long-term... W. Roper, V. Acosta-martinez, J. Moore, M. Mikha, D.K. Manter, C.E. Stewart, R.M. Lehman, M.A. Liebig, V.L. Jin |