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Mineral nutrition of vegetable crops: XXXVIII. Symptoms of macronutrient defici...

This research was carried out in order to study the symptomalogical chart of macronutrient deficiencies and verify the analytical level of the macronutrients. in lettuce plants under mineral deficiency conditions. Lettuce seedlings were cultivated and irrigated with nutrient solutions in the greenhouse. The treatments were: complete solution and solutions lacking N or P, K, Ca, Mg and S. Whenever the plants sho...