It is cultivated all over China, especially Heilongjiang soybean, which is also widely cultivated all over the world. Under normal circumstances, the fertilizer seeds are separated and applied 4-5 cm below the seeds, and the amount of chemical fertilizer can be adjusted. When more than 20 kg of diammonium phosphate is applied per 667 square meters, it can be applied in layers: the depth of upper layer seed fertilizer is 5-7 cm, and the fertilization amount accounts for 1/3.
The depth of base fertilizer is10-16cm, and the amount of fertilizer applied accounts for 2/3. Or after the previous crop is harvested, the fermented organic fertilizer is evenly spread on the ground, and then the fertilizer is raked into the soil with a rake, and the manure and the soil are thoroughly mixed, and then deeply turned, and the raked bottle is finely ridged, or soybeans can be planted flat.
Extended data:
Autumn sowing technology
Soil preparation: after ploughing, the paddy field is divided into compartments with a width of 2-3 meters, a row spacing of 3 meters and a hole spacing of 0.33 meters. 2-3 seeds per hole, with a density of about 30,000 plants per mu.
Sowing in time: Sow before August 10, and the sowing amount per mu is 8- 10 kg.
Field management: In case of high temperature during sowing, irrigation should be done after sowing. If the water content is insufficient after sowing, water can be irrigated in the evening. Spacing and fixing seedlings in time at the 3-leaf stage. Generally, the density of fixing seedlings is 30,000-40,000 plants per mu, and after fixing seedlings, 6-8 kilograms of urea is applied in time per mu. Timely intertillage weeding, generally 2-3 times intertillage weeding, but also soil cultivation.