in Maryland vegetable fields, which will reduce nutrient movement into the Chesapeake Bay, this research examined supplying nitrogen to watermelon plants only when needed as determined by the plant's nitrate content. Four levels of nitrogen
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Chesapeake Bay watershed. The objective of this study was to pinpoint correct nitrogen (N) rates and application methods for fertilizer sources containing varying amounts of ammonium, nitrate, or other N forms. The experiment was arranged as a factorial