Low temperature fertilization in winter has taboos

The temperature of ammonium bicarbonate is low in winter, and the ammonium bicarbonate is not easily decomposed and decomposed, which is beneficial to improve the utilization rate of fertilizer. Ammonium bicarbonate belongs to ammonium nitrogen fertilizer. It can be directly absorbed and utilized by crops after being applied to soil, and has quick fertilizer effect. It is a typical “quick fertilizer”. It can provide nitrogen nutrition for crops in time. Some people have done experiments to apply ammonium bicarbonate in winter wheat fields, and the effect is 1 to 1.5 times higher than that in high temperature seasons.

Avoid applying urea urea is an ammonium amide fertilizer. It can not be directly absorbed and utilized by crops after being applied to the soil. It needs to be converted into ammonium nitrogen by the urease secreted by urea bacteria in the soil to be absorbed by the roots. Here, the rate of urea conversion depends mainly on the soil temperature at that time; under normal conditions, all urea applied to the soil is converted to ammonium nitrogen, which takes 7-10 days at a ground temperature of 10 °C and 4 ° at 20 °C. 5 days, only 2 to 3 days at 30 °C. It can be seen that crops are topdressed in winter or early spring. If urea is applied, it tends to affect crop growth because of slow fertilizer effect.

The absorption of phosphorus and zinc by phosphorus and zinc fertilizers is significantly affected by temperature and light. In winter, the temperature is low and the light is insufficient. It is easy to induce phosphorus and zinc deficiency in wintering crops. Phosphate fertilizer and zinc fertilizer should be added appropriately.
Wang Yutang, The Peasant Daily (February 18, 2011, 07 edition)

Ductile Iron Spindle Assembly

Ductile Spindle Assembly is a crucial part for your lawn mower cutting deck that work together with the pulleys and belts to perform clean and even mowing.

It is combined from bearings, spindle housings, spindles, tubes, dust cap, screw nuts, etc.

Which kind of spindle assembly does QFQP produce?

We produce various kinds of spindle assembly, especial for riding mower (with aluminum/ductile iron housings). All parts assembled by our experienced workers.

Where are the products sold?

Main of our customers is from USA, CANADA.

Why choose QFAP?

We have specialized in producing high precision mechanical parts more than 10years, got 6years experience on mower deck spindle assembly.

All of our cooperators are large mower companies or agricultural equipment companies, such as Badboy Mowers, Wood-Mizer, Caterpillar, etc.

Because of the long term cooperation, we could supply our customers not only the products but also our recommendation on the designs to saving costs.

Ductile Iron Spindle Assembly,Cast Iron Spindle Assembly,Scag Spindle Bearing Replacement,Scag Spindle Pulley Removal

SHAOXING QIFENG AUTO PARTS CO., LTD. , https://www.sxqfap.com