One ton of pig manure is equivalent to 17 kg of ammonium sulfate, 21 kg of superphosphate and 10 kg of potassium sulfate.

One ton of cow dung is equivalent to 16 kg of ammonium sulfate, 16 kg of superphosphate and 3 kg of potassium sulfate.

One ton of horse dung is equivalent to 28 kg of ammonium sulfate, 19 kg of superphosphate and 5 kg of potassium sulfate.

One ton of sheep manure is equivalent to 33 kg of ammonium sulfate, 31 kg of superphosphate, and 5 kg of potassium sulfate.

One ton of chicken and duck dung is equivalent to 55-82 kg of ammonium sulfate, 88-96 kg of superphosphate and 12-17 kg of potassium sulfate.

One ton of rabbit manure corresponds to 86 kg of ammonium sulfate, 184 kg of superphosphate and 20 kg of potassium sulfate.

One ton of pig manure equivalent to 23 kg of ammonium sulfate, 12 kg of superphosphate and 12 kg of potassium sulfate.

One ton of calf manure equals 17 kg of ammonium sulfate, 10 kg of superphosphate and 8 kg of potassium sulfate.

One ton of common compost is equivalent to 20-25 kg of ammonium sulfate, 11-16 kg of superphosphate and 9-14 kg of potassium sulfate.

One ton of Chen wall soil is equivalent to 9.5 kg of ammonium sulfate, 28 kg of superphosphate and 16 kg of potassium sulfate.

One ton of plant ash is equivalent to 219 kg of superphosphate and 150 kg of potassium sulfate.

One ton of soybean cake corresponds to 350 kg of ammonium sulfate, 83 kg of superphosphate and 43 kg of potassium sulfate.

One ton of peanut cake is equivalent to 316 kg of ammonium sulfate, 73 kg of superphosphate and 27 kg of potassium sulfate.

One ton of cottonseed cake is equivalent to 171 kg of ammonium sulfate, 102 kg of superphosphate and 19 kg of potassium sulfate.

Fertilizer application rate calculation

The amount of fertilization is mainly determined by the nutrient balance method. The basic concept of the nutrient balance method is that the nutrient uptake of a crop is equal to the sum of nutrient supply of both soil and fertilizer.

Fertilizers provide some of the nutrients to the crop through fertilization. However, the amount of fertilizer applied to crops is not exactly the same as the supply of fertilizer nutrients. Because only a part of the nutrients input into the farmland is absorbed and utilized by the seasonal crops, considering the fertilizer utilization factor, the amount of fertilizer can be calculated by the following formula:

Planned crop fertilization (kg) = (total nutrient required for planned crop - soil nutrient supply) Fertilizer nutrient content Fertilizer utilization (%)

Crop fertilization refers to the amount of a certain nutrient element applied. Specific to chemical fertilizers, the amount of physical fertilizers is calculated by the following formula:

Planned Crop Fertilizer Quantity (kg) = Physical Fertilizer Dosage (kg) Active Ingredient Content (%)

among them

1. The total amount of nutrients required for planned production (kg) = (planned output/100) The amount of nutrients required for each 100 kg of production (refer to the table of the approximate amount of nutrients required for different crops to produce 100 kg of economic output).

The planned output is a further increase of 10% to 15% in the average annual output of local crops.

2. Soil nutrient supply (kg) = (no fertilizer production/100) The amount of nutrients required for each 100 kg of production.

The amount of soil fertilizer is generally estimated by soil sampling tests. In the absence of laboratory conditions, estimates can also be made by yield without yield (blank yield).

3. Under normal circumstances, the fertilizer's seasonal utilization rate is: nitrogen fertilizer 30% to 35%, phosphate fertilizer 20% to 25%, potassium fertilizer 25% to 35%.

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