The fertilization method should be correct. When making base fertilizer, apply it to the ground before planting, generally apply 10 to 20 cm below the surface; when planting fertilizer, be sure to pay attention to seed and fertilizer isolation, generally apply 5 to 6 cm below the seed as well; topdressing to open Ditch application is good.
The amount of fertilizer should be reasonable. The amount of use must be based on the product instructions, combined with the past fertilization amount in the region, to calculate a reasonable amount of fertilizer. There is less fertilization, and the combined effects of nitrogen, phosphorus and potassium are not available, and the application of compound fertilizer is not only cost-increasing, but also easy to produce burning and burning, which affects the rational absorption of nutrients by crops.
Single fertilizer combined with compound fertilizer. General-purpose compound fertilizer can only meet the needs of some nutrients in crop growth and development. In the rapid growth period of crops such as heading, grouting, etc., the demand for nitrogen is very large, and nitrogen fertilizer must be applied as appropriate, otherwise it will have a great impact on the output.
Huaxian Agricultural Technology Center Liu Xiuling
1. Components of piston rod seal:
Polyurethane, polyformaldehyde, rubber
2. Purpose and function of piston rod seal:
The rod seal belongs to the dynamic seal. It is the seal that moves with the piston rod. It is one of the important components on the hydraulic support.
3. Use position of piston rod seal:
Guide sleeve, piston
4. Working principle of piston rod seal:
It is used at the contact part between the guide sleeve and the outer cylinder to seal the emulsion in the outer cylinder.
5. What effects will be caused by improper use or operation of piston rod seal:
1. Improper selection of cavity support material will wear the cavity and piston rod.
2. The size of the friction pair is inappropriate, causing wear.
3. Improper thread guide angle of cylinder barrel and piston end wear the sealing ring.
4. The seal ring is worn due to improper installation guide angle of the seal.
5. The surface of cavity and piston rod is rough, with scratches and worn seals.
6. The outer cylinder leaks and the jack does not maintain pressure.
Piston Rod Seal,Hydraulic Cylinder Rod Seal,Pneumatic Rod Seal,U Ring Seals,Hydraulic Seals
DG Zhongxingshun Sealing Products Factory , https://www.zxs-seal.com