Do not apply immediately after leaving the pool. Generally should be stored in the storage tank for 5 to 7 days before the application; biogas residue and phosphate fertilizer should be stacked in accordance with the ratio of 10:1 5 to 7 days before the better.
Second, don't go directly to the top without watering. Doing so can cause burns in crops. Therefore, when the biogas fertilizer is topdressing, it is necessary to first exchange water, and the general amount of water is half of the biogas slurry.
Third, do not pour on topsoil. The methods of acupuncture and furrow application should be adopted and the soil should be covered with soil. When applied to paddy fields, they should be ploughed and spread evenly on the field, and then plowed to the bottom.
Four do not over-application. Generally less than ordinary pig manure.
5. Do not mix with alkaline fertilizers such as grass ash and lime, otherwise it is easy to cause loss of nitrogen fertilizer and reduce fertilizer efficiency.
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