Zinc deficiencies in wheat will appear "flower white seedlings", generally appear in the emergence of 1 to 2 weeks, a large area occurs in the seedlings 3 to 5 leaf stage, the young leaves of the seedlings appear white spots, and quickly expand the formation of local white areas, showing translucency The white silky shape, the wind is easy to break. The young leaves pale yellow to white, especially in the 1/3 of the leaves near the base. With the growth of the leaves, the leaves from the lingual tongue to the tip of the leaf appear white and green and parallel to the main vein. Zinc-deficient plants have short stature, shortened internodes, and sparse root systems.

Symptoms of zinc deficiency in rice usually appear 2 to 4 weeks after transplanting, with brown spots and streaks on the lower leaves, narrowing of leaves, chlorosis of new leaves, stagnant growth, short stature, no or very few tillers, and old roots. Blackness gradually died and only new roots emerged. Some land-leaf pillows were flat, misplaced, and the infertility rate of the flower increased. The rate of openness was high and maturity was delayed, which seriously affected the yield. Zinc deficiency often occurs in the old paddy fields, so the application of zinc fertilizer in old paddy fields is effective.

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