Radish fertilization technology points

The fertilizer requirement of radish is that the absorption of NPK is slower in the early stage of radish growth, and it accelerates with the growth. The growth of NPK is the most abundant. The absorption of NPK in radish varies greatly in different growth stages. Generally, the amount of nitrogen absorbed is higher in seedling stage, and the amount of phosphorus and potassium absorbed is less. In the early stage of succulent root enlargement, the absorption of potassium by plants is significantly increased, followed by Nitrogen and phosphorus, at the peak of nutrient absorption during the period of succulent root expansion, therefore, ensuring adequate nutrition during this period is the key to high yield of radish.
The fertilization technique is: under the medium fertility level, the fertilization amount per mu of the radish in the whole growth period is 3000~3500 kg (or commercial organic fertilizer 350~400 kg), nitrogen fertilizer 14~16 kg, phosphate fertilizer 6~8 kg, potassium fertilizer 9~11. Kilograms, nitrogen and potassium fertilizers are divided into base fertilizers and secondary topdressing fertilizers. Phosphate fertilizers are all used as base fertilizers, and fertilizers and farmyard manure (or commercial organic fertilizers) are mixedly applied. Base fertilizer: 3000~3500kg of farmyard manure or 350~400kg of commercial organic fertilizer per acre, 5~6kg of urea, 13~17kg of diammonium phosphate and 5~7kg of potassium sulfate. Topdressing: In the early stage of the expansion of fleshy roots, 11~13 kg of urea and 8~9 kg of potassium sulphate were applied. The fleshy roots were swollen in the middle of the mu, 9~10 kg of urea and 5~6 kg of potassium sulfate. Top dressing: In the middle and late growth period, 0.3% calcium nitrate and 0.2% boric acid can be sprayed 2~3 times to prevent calcium deficiency and boron deficiency. At the same time, 0.2% potassium dihydrogen phosphate can be sprayed on the foliage to increase yield and quality.

Ball Valves

There are five general body styles of ball Valves: single body, three-piece body, split body, top entry, and welded. The difference is based on how the pieces of the valve-especially the casing that contains the ball itself-are manufactured and assembled. The valve operation is the same in each case.

In addition, there are different styles related to the bore of the ball mechanism itself.

Ball valves in sizes up to 2 inch generally come in single piece, two or three piece designs. One piece ball valves are almost always reduced bore, are relatively inexpensive and generally are throw-away. Two piece ball valves are generally slightly reduced (or standard) bore, they can be either throw-away or repairable. The 3 piece design allows for the center part of the valve containing the ball, stem & seats to be easily removed from the pipeline. This facilitates efficient cleaning of deposited sediments, replacement of seats and gland packings, polishing out of small scratches on the ball, all this without removing the pipes from the valve body. The design concept of a three piece valve is for it to be repairable.

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