One * * * species: 10* 10= 100

Continuous cropping of Chinese cabbage is prone to diseases, so it is necessary to implement crop rotation, especially to advocate grain-vegetable rotation and paddy-upland rotation. In the cultivation of perennial vegetables, continuous cropping with cruciferous vegetables should be avoided, and early beans, early peppers, early cucumbers and early tomatoes can be selected for cultivation. The field for planting Chinese cabbage should be deeply ploughed on the kang of 20 ~ 27 cm for 10 ~ 15 days, and then the field should be broken and leveled, and made into a border with a width of 1.3 ~ 1.7 m or a narrow border with a height of 0.8 m ..