The planting time and technology of soybeans are different for different varieties.

Spring soybean type: it can be planted from February to May, and the earlier the sowing time is to the south. Huang-Huai-Hai summer soybean type: generally sown in June. Southern summer soybean type: generally sown in May-June. Autumn beans: generally sown in mid-July, no later than mid-August at the latest. Soybean planting technology: soil irrigation is needed after soil preparation, if the seed water content is high, it can be sunned before sowing and then sown, weeding work needs to be carried out before and after seedlings, diseases are easy to occur when flowering and podding, pay attention to active prevention and control.

Planting time of soybeans

The planting time of soybeans varies according to different geographical location, environment and climate. According to the sowing date, soybeans can be divided into spring soybean type, Huang-Huai-Hai summer soybean type, southern summer soybean type and autumn soybean type.

1. Spring soybean type: spring soybean seed, the more you go to the south, the earlier the sowing time.

The main results are as follows: (1) because the precipitation and temperature in Northeast China in May are suitable for sowing soybean, spring soybean in northern China is generally sown from April to May.

(2) Huang-Huai-Hai spring soybean was sown at the end of April and the beginning of May.

(3) the spring soybean in the Yangtze River was sown at the end of March and the beginning of April.

(4) Southern spring soybeans were sown from February to early March.

2. Huang-Huai-Hai summer soybean type: generally sown in June.

3. Southern summer soybean type: generally sown from May to early June.

4. Autumn soybean type: from July 15 to July 25, it can not be planted beyond August 15 at the latest. The growth cycle of autumn soybean is 70-80 days. It can be inserted early according to the situation to ensure that it can bloom before and after White Dew.

2. Soybeans planting techniques

1. Land preparation

The main results are as follows: (1) the flip technique is generally used in spring soybean areas.

(2) Ridge farming technology is commonly used in Northeast China.

(3) Harrow stubble technology, which is used in northeast spring soybean type and Huang-Huai-Hai summer soybean type.

(4) Deep loosening technology is a kind of mechanized operation, which is widely used in Heilongjiang area.

2. Irrigation before sowing: before sowing, the land in bad condition can be irrigated once 1-2 days before sowing to soak the soil.

3. Weeding before seedling: when the soil condition is good, soybeans are closed after sowing and before soil arch.

4. Weeding after seedling: weeding after seedling is carried out during the period of 1-3 compound leaves of soybeans and 2-5 leaves of weeds.

5. Seed selection

(1) Wind selection: the small and light seeds are removed by the wind, the heavy and large seeds are retained, and the wind separation can also be carried out by mechanization. this method is efficient.

(2) screening: the quality of its selection is high, and it is a good method. That is, use a sieve or screening machine to select.

(3) seed selection: on the basis of the first two screening methods, the seeds with large and full seed coat were selected.

(4) Mechanical selection: the lifting field machine can be used first, and then the particle separator can be used after screening. Or adopt double-entry operation and carry out comprehensive mechanized seed selection.

6. Seed treatment: if the storage condition is not good and the water content of the seed is high, you can sow the seed after drying for 2-3 days, and remember to spread the seed to cool down after drying; seed dressing should be carried out; seed coating should be treated with seed coating agent.

7. Disease prevention: the disease generally occurs at the time of flowering and podding, so we should spray fruit milk and other protective measures to protect flowers and pods.