Administrative Report Or Publication
 

A climate-yield-nitrogen computer program to evaluate wheat fertilizer strategies for optimal nitrogen application for winter wheat production in North Central Oregon

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  • The dryland cereal producer in the lower Columbia Basin makes many critical soil and crop management decisions each season. These decisions are made more difficult because of the highly variable climatic conditions that exist in the region. A particularly difficult crop management decision facing the cereal grower is the determination of the amount and the timing of nitrogen application given the uncertain climatic future. In the following, a user-friendly computer program entitled 11 Wheat Fertilizer Strategies for Optimal Nitrogen Application11 (WFSONA) is described. Its purpose is to assist farmers improve their nitrogen fertilizer decision making for dryland winter wheat production in North Central Oregon. Field research trials and long-term climatic data from the Sherman Experiment Station and wheat growers in and around Moro, Oregon were utilized to develop the program. The program accurately predicts yield and fertilizer requirements for farms in the 10-15 inch precipitation zones of the lower Columbia Basin. The program description is presented in three major sections. The first section after the Introduction, Section II, contains an explanation of the field research and climatic data upon which the computer model is based. Section III describes the determination of the individual farmers productivity index. The user is instructed in how to use the computer program in Section IV.
  • Published August 1987. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
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