Tree fruit soil fertility and plant nutrition in cropping orchards in Central Washington
DuPont, S. Tianna
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Healthy trees need healthy roots to take up water and nutrients; healthy soils to provide water, nutrients, and protection from plant pathogens; sufficient water; and exemplary horticulture. When considering tree nutrition, it is essential to start with standard soil and tissue diagnostics. These tools are often more valuable when used together, when coupled with observations of the tree, and when results are monitored over time for trends. There are many ways to create a tree fertility program. This publication will describe a strategy with five steps: 1. Know the common nutritional needs for your area; 2. Apply maintenance nutrient sprays; 3. Maintain optimal soil fertility levels; 4. Fertilize trees based on nutrient demand minus supply; 5. Monitor nutrient management program.