60Mn material Hot Rolling Ball have very good wear resistance and not broken, breakage is lower than 1%, and it have high impact value. Jinan Zhongwei 60Mn hot rolling ball have the advantage of large output, stable quality. Our 60Mn Hot Rolling Grinding Ball in the size ranging from 20mm to 60mm, which chemical composition: C:0.55-0.65, Si:0.17-0.37, Mn:0.7-1.0, Cr:≤0.25, P:<0.04, S:<0.04, and Hardness is 57 to 63HRC, mainly used to mining, cement plant and thermal power station.
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Precocious No. 5 Cabbage Cultivation
Due to the large area cultivated in the Hangzhou area, the variety is also called Hangzhou cabbage in Shanghai for cultivation of small cabbage. Its characteristic characteristics are: precocious, vigorous growth, growth period 50-55 days, leaf weight 1-1.5 kg, 3000-4000 kg per mu. Heat resistance, moisture resistance, high resistance to virus disease, downy mildew, soft rot, anthrax, suitable for high temperature, rainy time for the cultivation of Chinese cabbage, but also early cabbage cabbage cultivation for Chinese cabbage, summer and autumn season is listed as a fine variety. The leaves are thick, hairless, and the leaves are white, the net rate of the dishes is high, the leaves are soft, and the flavor is good. It is very popular with consumers.
Cultivation points: the elasticity of the sowing period is relatively large, generally in our open field cultivation in Shanghai in early April to early October can be cultivated for sowing cabbage. Facilities cultivation can be cultivated throughout the year. For example, Chinese cabbage can generally be sown in early August to late August, with 3500-4000 acres planted.
Basal fertilizer: 30 to 40 tons of mutton and pig ash, and 20 kg of commercial organic fertilizer, and 25 kg of compound fertilizer for vegetables.
Dressing: Cabbage needs a large amount of fertilizer. In addition to applying base fertilizer, it is often top dressing. Topdressing can be urea, and the depth is controlled at 1‰-3‰.
Disease prevention and pest management: The main diseases of early-maturing Chinese cabbage are soft rot, anthracnose, downy mildew, and high temperature and high humidity are easy to be attacked. It can be controlled by new pesticides such as carbendazim and chlorothalonil, which are highly effective and low-toxic. The main insect pests are yellow song strips, cabbage caterpillars, and diamondback moths, and yellow song strips can be sprayed with farmland music 800 times. Pieris calycei and Plutella xylostella can be controlled by pesticides such as Ruidan, Haizheng Sanling and Diju, and insect traps and Plutella xylostella sexual attractants are also effective for trapping and killing adults.
Short-term harvest: sowing cabbage, 25-30 days after sowing can be listed in batches of harvest, the output is generally about 1500-1800 pounds. Harvest cabbage cabbage, wait until the leaf ball eighty percent began to harvest in real time, the output of about 3000-4000 kg.