In the water-and-dry rotation, the soil undergoes a process of drying from wet to wet and from wet to wet. In the process of becoming wet, the pH of the paddy soil changes under waterlogging conditions, and the water increases, which can increase the content of available phosphorus. When the soil is wetted by the wet and the temperature in winter is low, the available phosphorus content is often reduced, which makes the phosphate fertilizer applied to the dry crop have a greater aftereffect on the later rice, and the phosphate fertilizer applied to the rice. The contribution of post-dry farming is small. Therefore, in the southern water-and-dry rotation area, especially in the case of phosphorus in the soil in the form of iron phosphate, the focus of phosphorus application is on dry farming, while the small amount of phosphate fertilizer is rooted to meet the rice seedling stage. The need to increase the effect of phosphorus can fully exert the effect of increasing production.
What is a Wheel Bearing?
A wheel bearing is a set of steel balls held together in a metal ring, called a race. At the center of your wheels, there is a hollow piece of metal, called a hub. The wheel bearings fit tightly inside this hub, and ride on a metal axle shaft, helping reduce friction when the wheel spins.
These are different from the engine bearings, as there is no constant source of lubrication for the wheel bearings, which means they need to be tight enough to keep away water and road dust. They also support the entire vehicle weight while driving, which is why they suffer a lot of abuse from rough roads, potholes, as well as lateral forces when turning.
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