Seed dressing. There are two kinds of commonly used seed dressing methods for soybean. One is the rhizobium powder seed dressing, that is, 20 to 30 grams of rhizobial powder per 250 kg of seeds and 250 g of clear water. The seeds and the powder are thoroughly mixed in the pot and dried. Seeding; the second is micro-fertilizer seed dressing, according to each 5 kg of seeds before sowing, weigh 5 to 10 grams of ammonium molybdate, fully dissolve ammonium molybdate with 250 grams of warm water, then spray the fertilizer on the seeds, try to make the fertilizer Covered with seeds, can be sown after drying. In the boron-deficient or zinc-deficient plots, seed dressing can be carried out with 0.05% borax solution or 0.1% zinc sulfate solution.
Reapply the base fertilizer. Soybean base fertilizer is better with organic fertilizer. Generally, 2000-3000 kg of high-quality farmyard manure is used per mu, and a small amount of fertilizer can be used. However, due to the tight summer time, the application of base fertilizer in soybeans is mainly based on chemical fertilizers. In plots with low soil fertility, nitrogen should be applied 6 to 7 kg, and phosphorus and potassium should be 10 to 12 kg each; for fertile land, nitrogen should be 4 to 5 kg, and phosphorus and potassium should be 8 to 10 kg each. After tilling, plowing.
Skillfully applied top dressing. There are two cases of topdressing. First, for the plots where no base fertilizer is applied, topdressing must be carried out. Generally, 3 to 4 kg of urea or 10 to 15 kg of ammonium carbonate, 20 kg of superphosphate and 10 kg of potassium fertilizer are used. Nitrogen fertilizer can be chased half in the seedling stage and the initial flowering stage. Phosphorus and potassium fertilizers should be chased one by one, and the method of chasing should be applied as a ditch. The second is to apply the base fertilizer to the plot, according to the seedlings, if the seedlings are weak and yellow, the amount of nitrogen fertilizer can be supplemented to prevent defatting. Flowering and pod-forming period is the period when soybeans need most fertilizer. Therefore, it is necessary to re-apply a topdressing fertilizer. It can chase urea 2 to 5 kg per mu, and potash fertilizer 7 to 8 kg, and apply it about 5 days before flowering.
Resin diamond cutting resin is a kind of abrasives and tools made of low temperature curing binder. Features: cutting processing, low calorific value, good self-sharpening, not easy to block, high surface finish of processed workpiece. Application: used in optical glass, glass tube, glass rod, quartz glass, glass fiber, semiconductor, hard alloy, ceramics, zirconia ceramics, circuit board (PCB) and other hard and brittle materials cutting or slotting.
It is mainly used for cutting or grooving ordinary glass, glass rod, glass Mosaic, ceramic plate, sapphire, stone slotting, semiconductor material, brake pad and other materials.
Advantages of electroplating diamond products ①Electroplating process is simple, less investment, convenient manufacturing; No need to repair, easy to use; The single layer structure determines that it can reach a very high working speed, which has been as high as 250 ~ 300m/s abroad; (4) Although there is only a single diamond, it still has enough life; ⑤ For roller grinding wheel with higher precision requirements, electroplating is the only manufacturing method.
Because of these advantages, high speed and ultra-high speed grinding with electroplated wheel occupies an undisputed dominant position.
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