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擇地头地边黑土层厚的地方,由地表向下挖1公尺深的溝。溝的上口寬45—50公分,溝底寬60—70公分。在挖到1公尺深以后,再向下挖1鍬深,这鍬土只松动不取出。溝的長度一般的为10公尺長,可并排搞几条平行的同样深寬的溝,溝与溝間可留出30公分的溝牆;溝牆的中央,每隔1.5公尺于溝牆中央挖通1个直徑30—40公分的孔洞;溝中的土,要分别放在兩侧溝沿上供复盖用。
Choose the depth of the black soil layer to the ground, dug 1 meter deep down from the surface of the ditch. The width of the ditch is 45-50 cm, and the width of the ditch is 60-70 cm. After digging 1 meter deep, dug down a deep shovel, this shovel only loosening does not remove. Groove length is generally 10 meters long, parallel to engage in a few parallel the same deep trench, ditch and ditch can leave a 30 cm ditch; ditch wall at the center of every 1.5 meters in the ditch wall The central dug through a hole 30-40 cm in diameter; soil in the ditch should be placed on both sides of the ditch for cover.