In the process of growing crops, if reasonable fertilization can be achieved, both the high quality and high yield of crops can be achieved, and fertilizer can be saved. So, how can we correctly determine the lack of fertilizer in crops? The determination of nitrogen deficiency in crops The main manifestations of nitrogen deficiency in crops are: thin and short shoots, small upright leaves, grayish green, petiole, veins, and surface reddening; small fruit, early fruits, easy to fall off, root development Not perfect, fine roots, large roots, and new roots yellow. The determination of crops lacking phosphate fertilizer The main performance of crops in phosphate-deficient fertilizers is relatively complex, and the performance of crops varies from crop to crop. When the corn lacks phosphate fertilizer, it will show slow growth at the seedling stage, symptoms after 5 leaves are more obvious, the leaves are purple, and the grain is not full. When wheat is deficient in phosphate fertilizer, it is characterized by slow growth of seedlings, poor root development, and reduced tillering. The base of the stem is purple, and the leaves are dark green, purplish, and small in number. The lack of potassium fertilizer for crops in the crop when the lack of potassium, the early stage will show the tip of the lower blade yellow, along the edge of the blade gradually yellow, but the veins on both sides and the midrib maintain the original green. When severe, it will gradually develop upwards from the lower leaves, eventually causing most of the leaves to yellow and the edges of the leaves to be fiery. Cereal crops will result in weakening of tillering power, short internodes, weakly sagging leaves, and soft and easy lodging of stems. The dicotyledonous plants will cause the leaves to curl, gradually shrink, and sometimes the leaves will be incomplete, but the middle of the leaves will remain green. Root crops cause root weight to decline and quality is poor.
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