In recent years, with the development of agricultural production, continuously increasing crop yields and quality requirements have become higher and higher. The number of nutrients that crops need to supplement has also increased. The application of trace elements has also increased over the past, but individual regions and farmers The single fertilization varieties, the reapplication of nitrogen, phosphorus and potassium, and the neglect of trace elements have a great influence on crop yield and quality. If palm fertilization and scientific fertilization techniques are applied, it will greatly affect farmers' production and income. I. Effect of manganese on crop growth and development and lack of manganese 1. Manganese is an activator of various enzymes in plants and participates in photosynthesis, promoting the formation of chlorophyll and the assimilation of carbohydrates. Therefore, when the plants are deficient in manganese, the chlorosis symptoms are very obvious, and it is easy to cause various metabolic processes of the plants to be blocked, resulting in reduced production. 2. When wheat is deficient in manganese, it shows that the leaves are covered with softness. The new veins are chlorotic, yellow-green and yellow, and when manganese is severely depleted, the plants wither until death. The lighter ones reduce the yield and quality. 3. When rice is deficient in manganese, the plants are short, with few tillers, and the leaves are short and thin, with serious fading, yellowish-green, and finally brown spots. In severe cases, the spots are connected into strips, and eventually they gradually become necrotic. 4. In maize, there is a lack of manganese, and the leaves appear yellow stripes parallel to the veins. In severe cases, long brown stripes with white centers appear on the leaves and finally die. 5. Tobacco is deficient in manganese, and young leaves are brown. The tissues between veins turn grayish green to white, and necrotic spots appear. Finally the leaves wither. 6, Apple lack of manganese, chlorosis between leaves, showing light green spots, severe brown veins and necrosis. Similar symptoms occur when other crops are deficient in manganese. In the past two years, manganese fertilizer has been applied to soils deficient in manganese in Baoqing County, which has obvious effect of increasing production. Second, fertilization principles and methods 1. In addition to the consideration of trace element content and crop species in the application of trace elements, the species of trace elements, the quantity, method and time of application should also be considered. 2. Manganese fertilizer as base fertilizer: When basal fertilizer is used, it is generally applied with manure or 1 to 2 kg of manganese sulfate per 667 square meters and can be mixed or applied. 3, manganese fertilizer can be seeded: per kilogram of seed with manganese sulfate 4 ~ 8 grams, with a small amount of water will be dissolved in the manganese sulfate sprayed on the seed, while spraying while turning and mix well, can be sown after drying. 4, manganese fertilizer soaking: with 0.5 ~ 0.1% of manganese sulfate solution, soaking for 8 hours, fertilizer and seed amount of 1:1, can be sown after drying. 5, manganese fertilizer spray: generally 0.1 ~ 0.2% manganese sulfate solution, every 667m' liquid volume 50 ~ 75 liters, respectively, in the seedling stage, the growth of spraying 2 or 3 times. Experts from H.T-Bauer turn their philosophy into realities in the design of Aquaspin: easy to assemble, convenient to operate and longer time to serve. And H.T-Bauer attaches great importance to the selection of all components for Aquaspin center pivot system to ensure the system meeting consistent demands over many years. Even under the most demanding conditions, i.e. heavy soil, heavily intersected terrain and extreme climate conditions, function design of the whole system can still gurarantee normal operation of Aquaspin center pivot system. Center Pivot Irrigation System 168mm Dia. Automatic Plant Watering System,Crop Irrigation Systems,Center Pivot Irrigation Agriculture,Automatic Farm Irrigation System Shandong H.T-BAUER Water and Agricultural Machinery & Engineering Co., Ltd. , https://www.ht-bauer.com