Nitrogen deficiency yellow seedlings. The results showed that the wheat seedlings chlorosis and yellow evenly, the tips of the leaves were dry, the old leaves of the lower part were yellow and withered, the dwarf leaves were weak, and the tillers were few. This kind of yellow seedlings are mostly found in plots with poor soil, insufficient base fertilizer, or unsatisfactory topdressing. For yellow seedlings caused by lack of oxygen, timely application of ammonium bicarbonate, urea, human waste and other available nitrogen fertilizer, replenishment promote long.
Manganese deficiency seedlings. The wheat lacks manganese, and the new leaf veins are chlorotic in strips, turning yellowish green to yellow. Sometimes the leaves are light green, the yellow stripes expand into brown spots, and the tips of the leaves scorch. In this regard, 0.1%-0.3% manganese sulfate solution should be sprayed 2-3 times.
Potassium deficiency yellow seedlings. Wheat first begins yellowing from the tip of the old leaf, and then stretches along the leaf veins. The yellowing line and the healthy line are distinct and inlaid. The leaves are yellow and soft, and are often affixed to the ground later. This type of yellow seedlings occurs mostly in sandy areas and is generally characterized by edging and edging. For potassium deficiency yellow seedlings, 667 square meters of available ash 100 kg applied to the foliage, or 10 kilograms of chemical potassium fertilizer. Foliar can also be sprayed with 1% potassium chloride solution, or 2%-3% potassium nitrate solution, or 5% ash leaching solution, or 0.3% potassium dihydrogen phosphate solution, and generally sprayed 2-3 times.
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