At the same time, urea is in a molecular state at the time of transformation, and it will be lost with water and soil, making it difficult to use crops. Ammonium carbonate surface application, easy to volatilize, and volatile ammonia will smoke the crop stems, leaves, causing damage. Urea and other nitrogen fertilizers are used as topdressing, and trenches should be used to cover the soil. For spraying foliar fertilizers, the application concentration should be well controlled and sprayed on wheat, rice, cotton and corn, preferably at a concentration of 0.8%-1%, and sprayed on vegetables at a concentration of 0.3%-0.5%. Direct seed dressing with superphosphate Since the superphosphate contains 3.5-5% free acid, direct seed dressing will reduce the seed germination rate and emergence rate. Therefore, the use of superphosphate as topdressing should be deep-seated; for seed fertilizer, seeds should be applied 5 cm to 6 cm below or to the side, and the seeds should be separated by soil.
Potassium sulfate and potassium nitride were weakly physiologically acidic when chemical potassium fertilizer was applied alone. After applied to the soil, potassium ions were absorbed and replaced by cations in the soil colloid, and the crop was difficult to use. Therefore, the application of potash fertilizers should be combined with nitrogenous fertilizers and phosphate fertilizers. In particular, phosphorus-deficient lands such as mountains, ridges, and newly reclaimed lands should be mixed with phosphate fertilizers in order to fully utilize the potent effects of potash fertilizers and phosphate fertilizers. The combination of zinc fertilizer and phosphorus fertilizer has serious "antagonism" effect between zinc sulfate and superphosphate. After the two are mixed and applied, the fertilizer effect of zinc sulfate will be inhibited and its effectiveness will be reduced. Therefore, phosphorus fertilizer should be used as base fertilizer, zinc fertilizer as seedling fertilizer, or zinc fertilizer as base fertilizer, and phosphate fertilizer as seedling fertilizer, which can improve fertilizer efficiency.
Ammonium chloride and potassium chloride are applied to sugar-cane, tobacco, watermelon, citrus and other chlorine-tolerant crops to degrade the sugar content of sugarcane and watermelon due to the action of chloride ions; tobacco reduces the burning performance; citrus light causes chronic poisoning Long-term lusterless, affecting photosynthesis, in severe cases lead to acute poisoning, leaving the old leaves unpeeled, the new leaves stiff, slow growth, and even dead. Therefore, ammonium chloride, potassium chloride and the like containing chloride ions are applied to chloride-resistant substances such as rice, wheat, corn, and cotton to exert their desired effects.
The multifunctional hydraulic Tattoo Chair is a large and thick seat cushion, exquisite, even stitches, no extra threads on the straight line, metal seat on the back of the seat. Tougher than usual, more resistant to stress.
feature:
1. Material: PVC and PU available;
2. Built-in large pump, face and pillow, pure sponge;
3. The headrest can be disassembled, the backrest and the leg rest can be adjusted, the foot stand can be rotated 90 degrees, and the footrest can be extended;
4. Two armrests can be adjusted up and down, 360 degree rotation;
This section allows the arm to be placed when the bed is flat;
6. Metal stripe pattern back arm, stainless steel material;
pedal
7. Weight: 200KG
8. Wheeled, easy to move
Multifunction Hydraulic Tattoo Chair
Multifunction Hydraulic Tattoo Chair,Multifunctional Black Color Tattoo Chairs,Table Chair Hydraulic Tattoo Bed,Professional Multifunctional Tattoo Chair
MING MEI ROYAL SPA FURNITURE , https://www.mingmeibeauty.com