Abstract
Abstract Mehlich‐I soil‐test calibrations and fertilizer recommendations were reviewed in light of the current literature. This review lead to 22 research/demonstration experiments conducted dominantly on cooperators’ fields. Crops included tomatoes (Lycopersicon esculentum Mill.), pepper (Capsicum annuum L.), watermelon (Citrullus lanatus Thunb., Matsum. and Nakai), muskmelons (Cucumis melo L. Reticulatus group), and snapbean (Phaseolus vulgaris L.). Soils selected for these trials included Ultisols, Spodosols, and Entisols. Minimum data collection at all sites included preplant soil tests (0‐ to 15‐cm depth) using the Mehlich‐I extractant, leaf tissue sampling (usually most recently‐matured leaf), and harvest data using USDA grading standards. Typically, four or five rates of P and/or K were used with four or five replications. The growers’ fertilization practices were also included in the trial. Additional yield samples were collected from outside the experimental area to verify yields obtained by the ...
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