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HS1123: Plant Part Selection and Preliminary Sufficiency Ranges for Sap Testing Interpretation of Greenhouse Herbs

Figure 1. Leaf parts of basil, dill, mint, oregano, and cilantro selected for sap collection. (Plant parts may not anatomically correspond to a petiole. Using the same leaf part in routine sap testing is necessary if the typical ranges presented above are to be used. The arrow marks plant part used for sap testing.)