Summary
Chemical determination of the mineral content of a mature, healthy, high-yielding greenhouse tomato plant has shown that the total nutrient absorption is equivalent to 345 pounds per acre of nitrogen, 74 pounds per acre of phosphorus, 716 pounds per acre of potassium, 295 pounds per acre of calcium and 43 pounds per acre of magnesium. These figures form the basis for a more intelligent estimate of the fertilizer requirements of this crop than can be obtained from the more common empirical methods. The analysis of individual tissues of a whole plant harvested at mid-growth gives a clear picture of the distribution of nutrients throughout the plant.
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Ward, G.M. Greenhouse tomato nutrition — A growth analysis study. Plant Soil 21, 125–133 (1964). https://doi.org/10.1007/BF01373879
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DOI: https://doi.org/10.1007/BF01373879