From the perspective of the amount of fertilizer, the specific amount of various fertilizers as base fertilizer can be determined by referring to the comprehensive factors of the local field fertilizer efficiency test results and target yields. Generally, about 30% of the total amount of nitrogen fertilizer on the high-fertility soil is used as the base application, medium and low For fertile soils, 50% to 70% of nitrogen fertilizer is used as base fertilizer, while phosphorus, potash and micro-fertilizers are applied all at once as much as possible. From the perspective of fertilizer varieties, the ammonium bicarbonate in nitrogen fertilizer, the general calcium, diammonium, calcium magnesium phosphate, three materials in phosphate fertilizer, potassium chloride, potassium sulfate, plant ash in potash fertilizer, zinc fertilizer and manganese fertilizer in micro-fertilizer, etc. All suitable as base fertilizer. In terms of depth, the general base fertilizer should be applied to the entire cultivated layer, that is, 15-20 cm in depth. For organic fertilizers, nitrogen fertilizers, potash fertilizers, and micro-fertilizers, they can be mixed and evenly spread on the ground, and then plowed into the soil, so that the fertilizer is evenly mixed with the entire cultivated layer. Phosphate fertilizers should be applied in two layers at the bottom due to poor mobility, that is, the lower layer should be applied to a depth of 15-20 cm, and the upper layer should be applied to a depth of about 5 cm. Hysteroscope Set,Hysteroscopy Set Examine,Rigid Hysteroscopy Set,Operating Hysteroscopy Sheath Se ZHEJIANG SHENDASIAO MEDICAL INSTRUMENT CO.,LTD. , https://www.shendasiaomed.com
Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone