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Essential elements: 1.6% Zn, 1% Fe. Iron plays an important role in the photosynthesis of plants, with the iron content in the level balance 1% helps good chlorophyll synthesis plants and avoid the bad ruin. Alkaline soils, soil (acidic), the land is fertile soil less severe iron deficiency. Besides, it should be noted in the process of fertilizing if nearby concentrations too high will reduce the amount of iron in the soil. Zinc increases the possibility of the use of the Kingdom (P) and nitrogen (N); increase the likelihood of resistant crops. The zinc content of balancing helps increase crop productivity markedly. In the alkaline soil environment, the zinc content of will. In the soil environment, the zinc content. For the land of sand, the wash of zinc almost happened.
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