Foliar analysis is a valuable tool for identifying nutrient deficiency and toxicity symptoms.
Older and most recent foliage from current season's growth. Soil nutrient analysis Soil nutrient analysis, followed by an appropriate fertilization program is a key element to the successful field production of nursery crops. Cultural practices, soil type, yield potential, and crop history influence lime and fertilizer recommendations. Soil test kits may be purchased from a local Cornell Cooperative Extension agent or ordered from Cornell Nutrient Analysis Laboratories at Cornell University. The testing kit consists of instructions on sampling, an information sheet, plastic bag, cloth mailing bag, and an envelope.