2,974 research outputs found
Management of phosphorus for crop production
This article continues a series that provides producers with information that will aid in phosphorus (P) management and in understanding environmental issues related to P management. It focuses on P management for crop production with attention to fertilization strategies, application methods, related soil management aspects, and environmental issues
Liquid Swine Manure Nitrogen Utilization for Crop Production
Manure is an important resource for meeting the nutrient needs of corn and soybean grown in Iowa. Land application is the most widely accepted and best economic and agronomic use of manure. Concurrently, however, is the environmental concern when manure nitrogen (N) and phosphorus (P) is not adequately accounted for or utilized by crops. Use of manure as a crop nutrient source requires producer confidence in nutrient availability and maintenance of high crop yields. When that confidence is lacking, either because of unknown application rates or uncertain nutrient content and crop availability, then additional fertilizer or higher manure rates are applied to ensure adequate soil fertility levels. This leads to over-application of crop nutrients, reduced profits, and potential for off-site movement and water quality degradation
Nutrient Management Plan
Management tools to help you develop a nutrient management plan and use the Iowa Phosphorus Index.https://lib.dr.iastate.edu/extension_pubs/1111/thumbnail.jp
Simulating Quantum Magnetism with Correlated Non-Neutral Ion Plasmas
By employing forces that depend on the internal electronic state (or spin) of
an atomic ion, the Coulomb potential energy of a strongly coupled array of ions
can be modified in a spin-dependent way to mimic effective quantum spin
Hamiltonians. Both ferromagnetic and antiferromagnetic interactions can be
implemented. We use simple models to explain how the effective spin
interactions are engineered with trapped-ion crystals. We summarize the type of
effective spin interactions that can be readily generated, and discuss an
experimental implementation using single-plane ion crystals in a Penning trap.Comment: 10 pages, 5 figures, to be published in the Proceedings of 10th
International Workshop on Non-Neutral Plasma
Phosphorus in aquatic systems
This article continues a series that provides producers with information to aid in phosphorus (P) management and to understand environmental issues relating to P management. It focuses on P in aquatic systems (wetlands, streams, rivers, and lakes) and its impact on surface water quality
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