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1. Conservation Management and Nitrogen Fertilization to Enhance Soil Chemical and Biological PropertiesCover crops and no-tillage are increasing in use across Texas. On the Southern High Plains (SHP) these practices are important mitigators of wind erosion and are suggested to increase soil health and other positive soil attributes. This study aimed to monitor and evaluate the soil chemical and biological changes that occur shortly after implementing conservation practices and nitrogen management strategies on the SHP. It was determined that in the short term some soil chemical and biological... M. Mcdonald, P. Delaune, T. Gentry, K. Lewis |
2. Nutrient Cycling Following Cover Crop Termination in Texas Cotton ProductionCover crop adoption on the Texas High Plains (THP) is severely limited compared to other agricultural regions in the U.S. Cotton producers on the THP consistently site water limitations as the primary reason for not implementing cover crops in their cropping systems. Previous research on the THP has shown that nitrogen immobilization following cover crop termination might be the most leading consequence of cover crops, not water availability. A study was initiated into existing long term... J.A. Burke, K.L. Lewis, J.L. Foster |
3. Measuring N2O Emissions from Dryland Sorghum Production Using Gas Chamber and Eddy Covariance Flux MethodsNitrous oxide (N2O) emissions are not well quantified in the dryland production systems of the Great Plains. Lack of field-based data has led to the use of questionable assumptions in various life-cycle analyses when dryland grain production is a feedstock. A field-scale trial of 81 acres was established within a 160 acre production field of dryland grain sorghum in northwest Kansas in 2021. Grain sorghum was no-till seeded into wheat stubble. Grower practices for nitrogen... L. Haag, P. Tomlinson, S. Patel, E. Santos |
4. Spatial Variability in Profile Soil Nitrate, Nutrient Update, Grain Yield, and Nutrient Removal in a Commercial Dryland Grain Sorghum FieldEstablished relationships exist that describe the confidence interval around a soil test value as a function of cores in the sample for nutrients such as phosphorus. This information is useful for developing economically and agronomically optimal soil sampling strategies. Residual soil nitrate can be a significant source of a crops N needs in dryland cropping systems where N loss is minimal. A common question among producers and consultants is how many profile N cores are required... L. Haag, S. Patel, P. Tomlinson, E. Santos |
5. Impact of Fertilizer Phosphorus (P) Source, Rate, and Placement Strategy on Yield, Nutrient Uptake, and P Losses in Snowmelt Runoff Water Across Variable Topographies in Saskatchewan, CanadaThe plant availability and mobility in soil of a fertilizer phosphorus (P) source is influenced by the solubility of the fertilizer product itself as well as the reaction products formed in soil over time. In 2021, 2022 and 2023, responses of wheat, pea and canola yield, P uptake and recovery were determined using eight fertilizer P sources applied in a broadcast and incorporate or side-band placement strategy at a low and high (20 vs 40 kg P2O5 ha-1) rates in... B. Weiseth, J. Schoenau, J. Elliott |
6. Evaluation of Nitrogen Fertilizer and Rhizobium Inoculation to Improve Grain Yield and Quality of Soybean and Dry Bean in Eastern MontanaInterest in production of irrigated soybean and dry bean in eastern Montana’s Lower Yellowstone River Valley increased substantially following the closure of a sugar beet processing facility in Sidney, MT resulting in the need for a replacement crop(s) on 30,000 to 40,000 acres annually. Yields of soybean and dry bean in this region varied significantly from 20 to 80 bu ac-1 in recent growing seasons, indicating a need for improved management practices. However, research-based... B. Franck, C. Kuester, K. Herhalo, C. Chen |
7. Wheat Zinc Nutrition: Agronomic Biofortification That Delivers Yield and Better Grain NutritionLow Zn availability in calcareous soils is a common issue in the Canadian prairies, where much of the wheat is exported, making Canada one of the world’s largest wheat exporters. Globally, 19% of the population, mostly pregnant women, infants, and children, suffers from Zn deficiency, highlighting the need to enhance Zn bioavailability in wheat grain. Agronomic biofortification offers a promising strategy to improve grain nutrient density while optimizing plant health and development. While... M. Proulx, X. Gao |