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1. Does Coal Char Reduce Ammonia Volatilization by Slowing Urea Hydrolysis in Soil?Ammonia volatilization due to urea hydrolysis begins immediately after N fertilizer applied in soil and continues up to two weeks. This process might adversely affect N availability in soil/ plant systems and reduce soil fertility and crop yields, as well as bring the negative impact in environment. Char, incomplete burning of coal combustion residue which contains up to 30% total C by weight, is hypothesized to reduce N losses from ammonia volatilization. A 21-day laboratory study was conducted... D. Panday, B. Maharjan |
2. Experiences in the Canadian Prairies with Enhanced Efficiency N Fertilizers for Winter and Spring Wheat Production SystemsThis presentation summarizes several studies all designed to address knowledge gaps around enhanced efficiency urea fertilizer (EEF) efficacy for nitrogen (N) management in western Canadian winter and spring wheat production systems. Polymer-coated urea was first studied to determine how handling effects can alter the coating integrity of environmentally smart nitrogen (ESN®). While N release rates increased from retail or farm-handling such as transferring... B. Beres |
3. 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 |
4. Winter Wheat Response to Enchanced Efficiency Fertilizers in the Canadian PrairiesOptimal nitrogen (N) management can improve agronomic efficiency, and increase winter wheat (Triticum aestivum L.) grain yield and protein content. Two experiments were conducted to measure the responses of winter wheat to enhanced efficiency N fertilizers and timing/placements across the Canadian Prairies. Experiment 1 consisted of uncoated urea, urea+nitrification inhibitor (urea+eNtrench®), urea+urease and nitrification inhibitors (SuperU®), and polymer-coated urea (Environmentally... Z. Wang, J. Owens, X. Hao, L. Hall, K. Coles, C. Holzapfel, E. Rahmani, R. Karimi dehkordi, B. Beres |
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 |