Narrow rows and dense planting can improve the population structure of soybean, increase the leaf area index, and improve the utilization of light energy. This technology is divided into narrow rows of dense planting (deep and narrow density), narrow rows of large ridges and close planting (4 rows or 6 rows on a 130 cm ridge, also known as large ridge density or large ridge wide planting), and narrow ridges and narrow rows of planting (45 Cm double precision on-demand), 110 cm ridge on the three rows of ridge dense planting and other comprehensive supporting models. Increase production and efficiency: Compared with the conventional 70 cm wide line spacing method, narrow rows and dense planting can increase production by more than 20%. In regions and lands with better production conditions, the production capacity of narrow-row densely planted soybeans is stable at more than 200 kg. When the previous crop was corn, the three-row planting method with 110 cm wide ridge was better. Technical points: 1. Select dwarf or semidwarf varieties with short internodes, strong culms, lodging resistance, and dense planting. 2. Deep loose. Deep relaxation can increase the reservoir capacity of the soil, improve the water storage capacity of the soil, and meet the water demand of soybeans. 3. Deeply apply fertilizer and spray foliar fertilizer. General nitrogen, phosphorus, and potassium fertilizers (active ingredient) can be applied in a ratio of 1:1.15 to 1.5:0.5 to 0.8 by using a knife-type fertilizer application device. Straws are deeply applied to the seed at 5 cm and 12 cm, and generally the urea is applied per acre. Kg, 15 kg of diammonium phosphate and 7 kg of potassium chloride. Pay attention to increase the amount of potassium fertilizer under the conditions of sufficient nitrogen and phosphorus fertilizers. In order to meet the nutrient demand of soybean during the flowering stage, foliar spraying with urea plus potassium dihydrogen phosphate as the foliar fertilizer can be carried out in split times; the first application is at the early flowering stage, and the second time is from the flowering stage to the initial stage of scab; Subsidiary dosage is 300-700 grams of urea per mu and 100-300 grams of potassium dihydrogen phosphate. 4. Sowing density. The general variety suitable density is 2.2 to 24,000 per mu, and the semi-dwarf variety can be increased to 2.4 to 26,000. For plots with good site preparation quality and high fertility levels, 10% of the sowing volume should be reduced; for plots with poor site quality and low fertility levels, 10% increase should be added. Appropriate area: narrow row and close planting is suitable for applications in areas with good soil and production levels; large ridges and narrow rows are suitable for application in low-lying lands and areas with high rainfall; small ridges and narrow rows are suitable for applications in general production conditions and small tractors. The area of ​​operation. The best choice for Analog hearing aids with earbuds design The best choice for Analog hearing aids with earbuds design Shenzhen Sunshine Technology Co.,Ltd , https://www.yatwinsz.com