Wheat suffers from a deficiency of nutrients that can affect yield and quality and must be diagnosed and treated. Symptoms of nitrogen deficiency: The plants are short and thin, with slow growth, narrow leaves, and light green leaves. In severe cases, the leaves turn yellow from the base upwards, leading to desiccation and dryness, with no more tillers, fewer secondary roots, and weak stems. Corrective techniques: Nitrogen deficiency at the seedling stage, can be applied to urea; return to the green period of nitrogen deficiency, can be applied 5 kg of urea per acre, jointing period and then apply 10-15 kg. Symptoms of phosphorus deficiency symptoms: Wheat seedlings grow slowly, leaf color appears dark green, dull, new leaves blue-green, purple tips, stems are weak, fewer tillers, poor root development, heading Yanghua delayed. The empty rate of wheat increased and the grain weight decreased. Corrective techniques: Phosphorus deficiency at the seedling stage, 35-40 kg of superphosphate per acre; phosphorus deficiency in the middle and late stages, 1.5-2 kg of superphosphate per acre in the earliest stages of booting and flowering, or 200 mg of potassium dihydrogen phosphate per acre. - 250 grams of water and 50 kg of foliar spray. The application method is every 7-10 days, even sprayed 2-3 times. Symptoms of potassium deficiency: The tips of the lower leaves of the young seedlings and the leaf margins turn yellow, and then gradually turn brown. The leaf margins are still green and look far like a fire. When the leaves are dry, the stems are small and delicate, and they are easy to fall. . Corrective technique: Apply 10 kg of potassium chloride or 50 kg of plant ash per acre during the seedling period, and also spray 50 kg of a 0.2%-0.3% aqueous solution of potassium dihydrogen phosphate in the middle and late stages of wheat growth. The interval between each application is 7-10 days, even spray 2-3 times. Zinc deficiency symptoms: wheat leaf chlorosis, heart bleaching, mid-late plant dwarf, small and brittle leaves, roots become black, more empty grains, 1000-grain weight is low. Corrective technique: In the seedling stage and jointing stage, 150-200 g of zinc sulphate is sprayed on 50 kg of water. China Agricultural Network Editor