Compound fertilizer cannot be used alone. Compound fertilizers are relatively fixed, and should be used in combination with other fertilizers according to the needs of various soils, different crops, and different nutrients of plants at different times, and the growth at that time. For example, if the phosphoric acid is 18% nitrogen and 46% phosphorus, it is used for the crops with more nitrogen. The amount of phosphorus is calculated by phosphorus, and the nitrogen is supplemented with carbon, urea and sulfur.
◠Phosphate fertilizer should not be applied in a dispersed manner. Phosphorus is easily absorbed by the soil and loses its fertilizer effect. The area of ​​contact between phosphate fertilizer and soil should be reduced, and it can be applied in the vicinity of crop roots by ditch application or acupoint application.
Ammonium sulfate cannot be used for a long time. The fertilizer is a physiological acid fertilizer that is used for a long time in a piece of land, which increases soil acidity and destroys the soil structure. Sulfate ions remain in the soil and interact with calcium to harden the soil compaction.
Ammonium bicarbonate should not be applied shallowly, the depth should be more than 6 mm, and the soil should be covered immediately after application. In addition, it is not suitable for application in the greenhouse. Hydrogen carbonate is commonly known as "gas fertilizer" and is easily decomposed into ammonia gas in the greenhouse to volatilize.
Potassium fertilizer should not be applied in the late stage of crops. Potassium can be transferred from the lower stems and leaves of the crop to the young part of the top for reuse. The symptoms of potassium deficiency are later than those of nitrogen deficiency and phosphorus. Potassium fertilizer should be applied in advance at the seedling stage or jointing stage or once as a base fertilizer.
◠Phosphate fertilizer should not be applied in a dispersed manner. Phosphorus is easily absorbed by the soil and loses its fertilizer effect. The area of ​​contact between phosphate fertilizer and soil should be reduced, and it can be applied in the vicinity of crop roots by ditch application or acupoint application.
Ammonium sulfate cannot be used for a long time. The fertilizer is a physiological acid fertilizer that is used for a long time in a piece of land, which increases soil acidity and destroys the soil structure. Sulfate ions remain in the soil and interact with calcium to harden the soil compaction.
Ammonium bicarbonate should not be applied shallowly, the depth should be more than 6 mm, and the soil should be covered immediately after application. In addition, it is not suitable for application in the greenhouse. Hydrogen carbonate is commonly known as "gas fertilizer" and is easily decomposed into ammonia gas in the greenhouse to volatilize.
Potassium fertilizer should not be applied in the late stage of crops. Potassium can be transferred from the lower stems and leaves of the crop to the young part of the top for reuse. The symptoms of potassium deficiency are later than those of nitrogen deficiency and phosphorus. Potassium fertilizer should be applied in advance at the seedling stage or jointing stage or once as a base fertilizer.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Manual Entertainment Hoists,Manual Chain Hoist,1.5Tonne Entertainment Lever Hoists,Manual Hoist
Guangdong Gongyou Lift Slings Machinery CO.,LTD , https://www.workmatehoist.com