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1. Long-term Crop Rotation Diversity Effects on Soil C and NThe objective of this study was to evaluate the effects of nitrogen (N) fertilizer level and crop rotation diversity on soil organic carbon (SOC) and N stocks from a 34-yr study located in eastern Nebraska. Seven crop rotations (three continuous cropping systems; two 2-yr crop rotations, and two 4-yr crop rotations) and three N levels were compared. Soil samples were taken to a depth of 60-inches. Differences in SOC stocks were largely confined to the 0 to 3-inch depth with greater SOC (P =... M. Schmer, V. Jin, B. Wienhold, G. Varvel |
2. Cover Crops in Certified Organic, Specialty Crop Food ProductionThere is a growing interest in certified organic, specialty crop food production. With a larger population demanding organic products and organic products offering a higher premium for the producer, farmers are exploring the transition to organic farming. Organic producers in southeastern Wyoming face multiple challenges in environments with high elevation, low precipitation, and have a short growing season. These challenges include management of persistent weeds, maintaining biodiversity, and... E. Moore, U. Norton |
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. Lentil Inoculant, Potassium, Sulfur, and Micronutrient Effects on Yield and Protein in the Northern Great PlainsLentil (Lens culinaris Medikus) is an important crop, averaging more than 600,000 ac in MT and ND from 2016-20. However, relatively little is known about inoculant and fertility response in lentil in the U.S. northern Great Plains. The objective of this experiment was to evaluate the effect of rhizobial inoculant formulations (granular and seed-coat) and nutrient additions (K, S, and micronutrients), on lentil growth, yield, and seed protein. This study was conducted at six or seven university... P. Miller, C. Jones, S. Atencio, C. Chen, E. Eriksmoen, S. Fordyce, P. Lamb, M. Ostlie, J. Rickertsen, M.A. Grusak, M. Bourgault, B. Franck, P. Carr, S. Koeshall, K. Baber |
5. Evaluation of N Source in No-till Winter WheatNitrogen (N) source efficacy is dependent upon product used, application timing, and the condition of the environment in which it is placed. This study serves to look at how different N sources can be affected across different regions of Oklahoma, specifically in a heavy residue, no-till environment. N sources that were included in the study were Urea, Urea-Ammonium Nitrate (UAN), UAN + Anvol, and SuperU. The N sources were evaluated across nine site-years (SY) where each product had four... J. Derrick, B. Arnall, M. Smith, J. bigatao souza |
6. Nitrogen Management in Semi-arid Conservation Cotton Production SystemsThe Southern High Plains (SHP) region of Texas is one of the largest cotton-producing regions in the United States. Cotton production is hindered by climatic conditions and wind erosion, but attempts have been made to adopt conservation management practices like cover crops and crop rotations to limit these effects. Conservation management practices can reduce a soil’s susceptibility to wind erosion, but their adoption has been limited on the SHP due to producers’ concerns regarding... J. Burke, K. Lewis, W. Keeling, W. Keeling |