Soybean fertilization should not be excessive. Over-application of base fertilizer can severely affect seedling emergence and root development. Applying fertilizer directly with the seeds during sowing can cause serious damage to the radicle and hypocotyl of the soybean, even preventing some seeds from germinating. Therefore, it is crucial never to mix chemical fertilizers with seeds when planting. Excessive base or top-dressing fertilization can lead to excessive growth, lodging, and ultimately lower yields. Hence, over-fertilizing soybeans should be avoided.
After applying fertilizer, it is essential to ensure adequate water supply. If irrigation is not timely after deep application, it may harm the roots. Surface application, on the other hand, can result in the fertilizer being lost due to sunlight, making it ineffective for the soybeans.
When fertilizing soybeans, it is important to consider the plant type of the variety. For tall-growing varieties, large amounts of fertilizer and water should be used with appropriate spacing. Otherwise, it may lead to an increase in empty stalks or even lodging, which reduces yield.
Fertilizer application should also take into account soil fertility. In high-fertility soils, less or no base fertilizer should be applied. Additionally, tall varieties should be planted more sparsely. A top dressing can be applied during the pod-filling stage to support further growth.
In summer soybean cultivation, a moderate amount of organic fertilizer along with phosphorus and potassium is beneficial for developing a strong root system and increasing nodulation. Therefore, soybeans should receive more organic and phosphorus-potassium fertilizers. It is best to combine organic and phosphorus-potassium fertilizers as a base fertilizer, which helps strengthen the roots, enhance nodule formation, promote flowering, and result in full and healthy grains.
Under normal soil fertility conditions, nitrogen fertilizer should not be applied during the branching stage. Studies have shown that applying nitrogen at this time can inhibit root and nodule development and cause flower buds to turn into leaf buds, leading to excessive vegetative growth and reduced yield.
Many experts both domestically and internationally believe that applying nitrogen fertilizer during the flowering stage can increase yield. However, under normal soil fertility conditions, it is better not to apply nitrogen at this stage. If the soil is low in fertility, only a small amount of nitrogen should be used, as it can cause severe drop of buds and flowers. Applying nitrogen during the late pod-filling stage can reduce shriveled pods and significantly increase the weight of 100 seeds. It may also encourage some plants to produce new buds and pods (mostly containing one or two seeds), thus increasing yield by 20% to 40%. This is because, by the grain-filling stage, the vegetative growth has largely stopped, and the growth rate of roots and nodules slows down. During the grain-filling period, soybeans absorb about 60% to 65% of their total nitrogen and phosphorus, with the demand for nitrogen being 8 to 9 times that of phosphorus. Therefore, soybeans often experience a shortage of nitrogen during the grain-filling stage. Applying nitrogen during the late pod-filling stage meets the needs of grain filling without causing excessive growth, thus significantly increasing grain yield. In phosphorus-deficient areas, nitrogen and phosphorus can be applied together, with an optimal ratio of 9:1. After applying the fertilizer, proper irrigation should be ensured.
CBN Grinding Wheels
CBN is a man-made Superabrasive that
outperforms Diamond when used for Ferrous grinding operations.
CBN derives its name from its chemical
makeup, of the cubic form of boron nitride (CBN). It has a very desirable
characteristic that is sought after when working with difficult to grind (DTG)
materials.
Due to its high thermal stability and
chemical resistance, the CBN grinding wheel is most suitable for grinding hard
ferrous materials, hardened steel, bearing steel, nickel based
alloys. machining ferrous materials.
CBN Grinding Wheels are used to sharpen,
cut, or remove metal from hard surfaces. Use these wheels when you need a good
consistent finish.
Most notably CBN wheels are used to cut HSS
metals, like wood tools, blades, bits, and cutters. This type of steel is
better than the older high-carbon steel because it can withstand higher
temperatures. When you`re tools become dull over time from use, a CBN wheel
will bring them back to its sharp use.
Kemei produce CBN(cubic boron nitride)grinding
wheels, which can be resin bonded CBN wheel, metal bonded CBN wheels and
electroplated Diamond Grinding Wheels. For same steel parts, you can choose all
three types CBN wheels, but there still some difference, if you need more
information and the best solutions ,please contact us.
Cbn Grinding Wheels,Cbn Cut Off Wheel,Diamond And Cbn Wheels,Electroplated Cbn Grinding Wheels
Henan Jinlun Superhard Material Co., Ltd , https://www.jinlunsuperhard.com