Iron fertilizer should not be applied to the soil. Iron fertilizer is easily fixed by soil and converted into poorly soluble compounds, which loses fertilizer efficiency. Therefore, it is necessary to use a foliar spray method, such as ferrous sulfate, with a 0.2 to 0.5% aqueous solution to spray the fruit trees with iron deficiency symptoms. Tool carts are favorable due to lower price and large storage space. Big power tools can be stored on shelves. Drawer Tool Cart,Service Tool Cart,Utility Tool Cart,Drawer Utility Cart Changzhou Xingsheng Tianhe Electric Appliance Co., Ltd , https://www.roller-tool-cabinet.com
What are the contraindications for crop fertilization?
The ammonium nitrogen fertilizer cannot be mixed with an alkaline fertilizer, such as ammonium hydrogencarbonate, ammonium sulfate, ammonium nitrate, ammonium phosphate, etc., which cannot be mixed with grass ash, ash ash potassium, lime, or the like.
Nitrate nitrogen fertilizers are avoided in rice fields. The nitrate ions dissociated from ammonium nitrate, potassium nitrate, and sodium nitrate are easily leached to the deep layers of the soil in the rice field, causing anti-digestion and loss of nitrogen. The application of nitrate nitrogen fertilizer in dry land should also prohibit the pouring of large water before or after heavy rain to avoid reducing fertilizer efficiency.
Ammonium bicarbonate should not be applied shallowly. It should be covered immediately after deep application, and the depth should be more than 6 cm.
Ammonium bicarbonate is not suitable for application in a greenhouse. Ammonium bicarbonate farmers commonly known as "gas fertilizer" in the greenhouse generally have a higher temperature, so it is easy to decompose into ammonia gas and volatilize and lose fertilizer efficiency.
Ammonium sulphate should not be used for a long time. This fertilizer is a physiological acid fertilizer. It can increase the acidity of soil and destroy the soil structure in a long time. In alkaline soil, ammonium ions in ammonium sulphate are absorbed by crops, while ammonium in ammonium sulphate The ions are absorbed by the crop, and the sulfate ions remain in the soil, acting with calcium to make the soil compact.
Chlorinated fertilizer should not be applied to saline-alkaline soil and bogey-free crops. After ammonium chloride or potassium chloride is applied to the soil, the chloride ions remain in the soil. Long-term use will increase the accumulation of chloride ions in the soil, resulting in soil salinization. Application on saline-alkali soil will aggravate salt damage. Applying chlorine fertilizer to chlorine-free crops such as sugar cane, sugar beets, potatoes, grapes, watermelons, tobacco, etc., will reduce yield and quality.
It is not advisable to water immediately after urea application. After urea is applied to the soil, it exists in a molecular state. The crop is difficult to absorb and use, and it is easy to be lost with water. Therefore, it is not suitable to be watered immediately after application of urea. It should not be applied before heavy rain. It should be applied in the same way as ammonium bicarbonate. Covering the soil, and improving fertilizer efficiency.
Phosphate fertilizer should not be applied in a dispersed manner. Phosphorus is not easy to move in the soil, it is easy to be absorbed and fixed by the soil, and loses fertilizer efficiency. Therefore, the contact area between the phosphate fertilizer and the soil should be minimized. Do not disperse the application. It can be applied to the root of the crop by means of ditch application and hole application.
Potassium fertilizer should not be applied later, and potassium is more fluid in crops. In the absence of potassium, potassium can be transferred from the old tissue of the crop (lower stems and leaves) to the younger part of the top. Therefore, potassium deficiency is later than the symptoms of deficiency of nitrogen and phosphorus. Therefore, potassium fertilizer should be applied in advance, usually at the seedling stage or At the jointing stage, there is a medium-term topdressing, or a one-time application of base fertilizer.
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