According to the nature of soil application of different fertilizers and the use of different fertilization methods called soil fertilization, the most basic and effective method is: 1, the soil fertility and fertilizer characteristics have a great impact on the effect of fertilization. All soils are relatively heavy, organic matter content is relatively high, and fertility is relatively strong. Even if more fertilizers are applied at one time, nutrients will not be lost. On the contrary, the soil is sandy, and the content of organic matter is relatively small, so the fertility conservation capacity is correspondingly weaker. In this soil fertilization, the amount should not be too much at one time, and a small amount should be used for a few times to avoid wastage of nutrients and waste. However, the characteristics of soil fertility are also different, and some fertility is long and stable. This kind of soil is “sufficient to be hungryâ€. It can be more fertilized once, and the frequency can be less; there is premature and there is not enough stamina. Fields should pay attention to late-stage fertilization of crops; late-onset fields that have late strength and lack of strength should pay attention to early fertilization. 2. The amount of nutrients in the soil is the main basis for determining which fertilizer to use and how much to apply. The nutrient status in the soil is not only related to the parent material of the soil, but also has a direct or indirect relationship with the former crop. Generally speaking, if the former is a bean crop or green manure, the nitrogen in the soil is more and more phosphorus should be added. Potassium fertilizers, such as former crops such as rice or wheat, will consume more nutrients in the soil, and nitrogen, phosphorus, and potassium fertilizers, especially nitrogen fertilizers, should be added. 3, the acidity of the soil will affect the effect of fertilization, while the application of chemical fertilizers will affect the acidity and alkalinity of the soil. Acidic soil should be selected alkaline fertilizers, such as ammonia, ammonium bicarbonate, calcium magnesium phosphate, etc., alkaline soil should be selected acidic fertilizers, such as calcium superphosphate, ammonium sulfate, etc., so as to avoid the soil becomes too acid or alkali, It is beneficial to the absorption and utilization of nutrients by crops.
Product Dimesnion: 6.9" x 3.7" /17.5cmx9.5cm
Mask Fabric Material: 3-ply material,100% polypropelyne
Ear Loop Material: 70% polyamide, 30% elastane
when to use: suitable for adults to use daily in a variety of settings such as home, outdoors and work
packaging: 50 pcs of mask in one sealed plastic bag and into box to ensure hygiene or 10pcs per bag
certification/standard: GB/T 32610-2016(China disposable mask standard) and FDA registered
about the manufacturer: Kapanou is china-based healthcare company
Civil Disposable Face Mask
face mask for sale online,Civil Disposable Protective Mask,Non-Woven Face Mouth Cover,3 Ply Disposable Face Mask,white list certified protective mask
Ningbo Debeida Science&Technology Co.,ltd. , https://www.dbdmask.com