Calcium phosphate contains a large amount of free acid and is applied in large quantities continuously, which causes acidification of the soil. Calcium magnesium phosphate containing 25% --30% of the lime, a large amount administered will increase, and alkaline soils physicochemical properties deteriorate. Excessive application of calcium phosphate will cause zinc in the soil to interact with excess phosphorus, resulting in zinc phosphate precipitation, which cannot be absorbed by the crop. Excessive application of calcium magnesium phosphate fertilizer, excess phosphorus will interact with zinc in the soil, producing magnesium hydroxide that the crop can not absorb, causing zinc deficiency in crops. Appropriate application of phosphate fertilizer will promote the absorption of molybdenum by crops. However, excessive application of phosphate fertilizer will cause the phosphorus and molybdenum to lose nutrient balance, affecting the absorption of molybdenum by crops, and exhibiting “molybdenum deficiencyâ€. According to the study, excessive application of phosphate fertilizer will also cause the silicon in the soil to be fixed and not absorbed, causing the crop to be deficient in silicon, especially for the grass crops of Si. The phosphorus content in the soil is too high, and the more phosphorus is absorbed by the crop, the more respiration of the plant is too strong, the dry matter consumed is greater than the accumulation, and the reproductive organs are developed in advance, causing the crop to mature prematurely, the grain is small, and the yield is low. The amount of phosphate fertilizer applied should generally be determined according to the available phosphorus content of the soil. When the content is less than 10 μl / L, 30-35 kg of standard phosphate fertilizer can be applied per 667 m 2 . Content of 10 - 20 l / l, 2 15 - 25 kg per 667 m is applied. Generally, phosphate fertilizer can be applied once a year.
3000 Lbs electric winch are 12 v and 24 v DC winches.
It can be used for marine railway, atv or boat applications.
If you need to get something unstuck, lifted, or loaded, an electric winch can save a ton of back-breaking work.
The hardest part may be deciding which one you need.
Winches are commonly available with either a 12V DC or a 110V AC motor.
For fixed operations, such as a marine railway, a 110V winch works well because it can be plugged into an electrical outlet.
For portable applications or use with a vehicle as the anchor, a 12v Winch is the way to go. These units can be hard-wired into a vehicle or simply hooked up to a battery.
The next consideration is capacity-what weight rating should you look for? As a general rule, take the maximum load that you expect to winch and multiply it by 1.5. The weight rating is based on the first wrap of the cable around the drum. With each layer of cable, the pull capacity actually drops, so when in doubt, go larger.
Always stay well to the side of a working winch, and always drape a heavy jacket or tarp over the line. If a cable breaks, the heavy material will help absorb the energy of the taut cable as it snaps back, and reduce the chance of injury.
If a load outweighs your winch rating, remember those high school physics lessons about pulleys and mechanical advantage. You can double the pulling capacity by [doubling" the line. Run it through a Snatch Block attached to the object you`re moving and then back to a fixed object. Twice the capacity, however, equals half the pulling speed.
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