Wheat is the most important grain of trade for human consumption. It is produced in a vast range of en-vironments from central Russia to the great Indian and Chinese river valleys and across the Great Plains and Pampas of the Americas. Soils and climates vary and so do yield potentials, so that developing appropriate local nutrient management strategies is critical to ensure that yields are produced that give the most effi cient use of fertilizers.The principles of 4R Nutrient Stewardship?aapply the right source of plant nutrient, at the right rate, at the right time, and in the right place?aaim to use sound science to develop best management practices, producing good yields, providing good human nutrition, and keeping nutrients where they belong. The 4Rs underpin social, economic and environmental goals. This special edition of Better Crops with Plant Food is focused on wheat and provides some examples of the sci-ence underpinning the 4Rs. This edition draws on examples of current best practice for nutrient management developed through IPNI's Nutrient Management Decision Support for Wheat Systems workgroup. It has examples from the major wheat production zones showing how the application of good science can improve yield and quality
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