Nitrogen deficiency: slow growth, dwarf plants, erect, reduced tillering, leaf shape is small, yellowish leaves; symptoms spread from the bottom up; when the lower part of the leaves yellow wither early fall, small spikes and small grains. Phosphorus deficiency: reduced tillering, leaf color dark green, dull, leaf color purple at seedling stage; maturity delayed, grain not full. Potassium deficiency: slow growth of plants, poor development of mechanical tissues, low coking on the edges of the lower leaves, premature yellowing, and weak stems and lodging. Calcium deficiency: The leaves are gray, the new leaves turn white, and then the tips of the leaves wither. Magnesium deficiency: The plants are short, and the lower leaves often show chlorosis; usually the old leaf veins turn green and yellow between the veins, and the remaining small green patches are connected to the rosary. Sulfur deficiency: The whole plant is light green and leaves yellow, similar to nitrogen deficiency, but usually the symptoms first appear in young leaves. Iron deficiency: The new leaves lack green and yellow, yellow and yellow veins between the veins and veins, showing obvious stripes and mosaics. Manganese-deficient: Slender leaves, irregular spots in early leaves, grayish spots, pale yellow or brown spots in old leaves. New leaf veins chlorotic yellow. Boron deficiency: The leaves are white, curled, and the leaves shrink into wavy; because of stamen development after heading, the anthers are empty, the anthers are aborted, and normal pollination cannot be completed, resulting in "inactivity." Copper deficiency: New leaves yellow and white, become needle-shaped, curled; early symptoms are not obvious, because of pollen abortion after the ear is not true, that is, "spontaneous disease." Zinc deficiency: long-term dwarfing of wheat seedlings is not long, the jointing period of the wheat seedlings does not pull out of the festival, becoming dwarf; leaf veins on both sides of the main venation chlorosis, generally first from the lower old leaves began to lose the green, gradually up to the flag leaves are also obvious chlorosis Symptoms, the old leaves of the lower part of the gradual death; serious zinc deficiency, the wheat can not heading, and some even heading is a small number of ear, production is very low, or even out of production. Lose Weight Plant Extract,Poria Extract,Seaweed Extract,Codonopsis Pilosula Extract Fufeng Sinuote Biotechnology Co.,Ltd. , https://www.sntbiology.com