Pears Public Deposited

http://ir.library.oregonstate.edu/concern/administrative_report_or_publications/nc580n30p

Reprinted June 1997. 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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  • Fruit tree fertilization is a standard grower practice intended to supplement soil-supplied nutrients. Both soil-applied fertilizers and nutrients stored within the tree are important. Tree reserves are the major source of nutrients for developing tissues before petal fall. Current-season growth and yield are influenced by nutritional status, which in turn is affected by prior management, fertilization, and current growing conditions. The task of recommending fertilizer rates and timings therefore is complex and challenging. Observations of annual shoot growth, crop load, size and color of leaves, and fruit size are helpful in determining fertilizer needs. In addition, leaf analysis indicates which elements are present in adequate, deficient, or excessive amounts in established orchards. Soil sampling and testing of fields before orchard planting is recommended. Apply and incorporate K, Mg, and lime before planting. Soil analysis is useful for predicting lime and fertilizer needs for both cover crop and trees.
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