Prioritizing Nutrient Inputs to Maximize Use Efficiency

April 2021 | 20 min., 32 sec.
by Katie Lewis
Texas A&M AgriLife Research and Texas Tech University

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​The presentation focuses on optimizing nutrient inputs to maximize nutrient use efficiency. Updated recommendations are based on a reevaluation of nutrient requirements and partitioning patterns in more modern cotton cultivars. Compared with earlier findings reported by Mullins and Burmester (1990), modern cotton cultivars have a larger resource pool and greater efficiency in partitioning of dry matter toward fruit development. As a result, newer cultivars have larger resource sinks and thus take up larger amounts of fertilizer. Additionally, modern cultivars have better efficiency in using and remobilizing macronutrients to produce more lint yield, resulting in greater use efficiency of fertilizers.

About the Presenter

Katie L. Lewis Katie L. Lewis As an agricultural and environmental soil scientist, Dr. Katie Lewis is continually striving to enhance her understanding of the critical challenges currently facing agriculture and society. As the daughter of a South Texas farmer (Taft, San Patricio County), she was introduced at a young age to these challenges of sustainable agriculture and how they affect society. Dr. Lewis considers soil to be one of our most valuable natural resources, with the ability to produce food, feed and fiber, recycle wastes, filter and break down contaminants, and sequester carbon. As an assistant professor of soil chemistry and fertility at Texas A&M AgriLife Research and Texas Tech University, Dr. Lewis is provided the opportunity through research and service to enhance the agricultural sustainability of the Texas High Plains region that is vitally important to both Texas and the nation, while helping educate future scientists, farmers, society, and policy-makers. Dr. Lewis received her BS in chemistry from Sam Houston State University in 2008. She received her MS and PhD in 2010 and 2014, respectively, from Texas A&M University. With a joint appointment at Texas A&M AgriLife Research in Lubbock (75% research) and Texas Tech University (25% teaching), Dr. Lewis is deeply engaged in research, teaching and service.​

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