Maize "close density" planting method that corn "three than empty" planting methods: ridge spacing of 47 cm, planting spacing of 20-22 cm, ridge spacing of 40 to 44 cm, with 4 ridge as a cycle, namely Mubaobao is 4000 to 4500 plants; it is planted with three ridges and one ridge, three ridges are dense on both sides, and the middle is dilute.
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