In the south, the rainy day in early April, the rice is guarded against rotten cockroaches.

In the next 10 days, there will be more rainy weather in the middle and lower reaches of the Yangtze River and the eastern part of the southwestern part of the country. All areas should use spring precipitation to carry out spring sowing in a timely manner. In areas where rotten species are rotten, attention should be paid to seedling replanting, and areas that grow into seedling stage should be well managed. , cultivate strong seedlings.



It is expected that in the next 10 days, the rainy processes in the eastern Sichuan Basin, Jianghan, Jianghuai, northern Jiangnan and Guizhou will be frequent. The main rainfall periods will be 7-8 days, 11-13 days and 15-16 days, and the total rainfall is generally 10-30. In millimeters, some areas have 40 to 70 millimeters; compared with the same period of the previous year, the rainfall in the northern part of the Yangtze River is close to the same period of the previous year, and the precipitation in the rest of the above areas is 2 to 70% more than normal. At present, the early rice transplanted in the south of the Yangtze River has been basically planted, the live early rice is in the stage of sowing and emergence, and the early rice in southern South China has been transplanted one after another. A season of rice planting in the southwestern region entered the later stage. Jianghan's rice, spring corn and cotton have entered the sowing stage. According to the current planting progress of spring ploughing in the south, it is recommended that:

1. Jiangnan and Southwest rice areas should strengthen the management of Putian, rational fertilization, and cultivate strong and strong; the fields with rotten and rotten species should be replanted in time, and the areas where the seeding tasks have not been completed should use the interval of precipitation to speed up the sowing schedule, so as not to delay the farm time. Jianghan should avoid the rainy weather and carry out the spring sowing work in time.

2. All parts of South China should plan water well, soak the fields in time, apply enough fertilizer, and transplant early rice at the right time.

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Carbon Steel Washer

Low carbon USS flat washers, typically used with Grade 8 or hardened steel bolting, are used under bolt heads or nuts to increase the bearing surface area, or to offer protection so that the nut or bolt can be rotated without distortion of the bearing surface. Flat washers are also used to give tightness to a joint, to prevent leakage, and especially to distribute pressure under the head of a bolt or nut. Dimensional specifications are governed by ASME B18.21.1. USS (United States Standard) flat washers have a larger outer diameter than SAE (Society of Automotive Engineers) flat washers, and can be utilized in nearly any application. ASTM F844 covers the standard specifications for unhardened steel flat washers for general use. Available in zinc plated finish. Zinc plating sacrifices itself, corroding before the base material, offering added corrosion resistance.

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