Onions crop rotation

Three or four years is the usual recommended minimum for a crop rotation, but it can certainly be longer. If you know that your soil has a serious, persistent problem, such as potato cyst nematode, onion white rot, or clubroot, you may need a much longer rotation to grow susceptible crops with any success. 

What to do Grow plants under fleece or fine mesh netting, put in place immediately after sowing or planting. Remove infested plants as soon as onion fly is discovered. Rotate crops cultivate soil in winter to expose pupae to predators. 

Types of dark-brown or black granular muck have produced large quantities of vegetable crops and are often used for grain production and stock farming. Fertilizers, especially potash, can be used profitably. Rotations with oats and rye are common when the principal crops, such as onions, celery, and cabbage are threatened with insects and plant diseases. The production of reed and sedge peat and muck for soil improvement is of commercial importance in this area. 

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