Cover crop techniques

Blum U., King, L.D., Gerig, T.M., Lehman, M.E., Worsham, A.D. Effects of clover and small grain cover crops and tillage techniques on seedling emergence of some dicotyledonous weed species. Amer J Altern Agricul 1997 4 146-161. 

Another control technique is to plant a cover crop of marigolds in infested soil to lower nematode populations. Apparently, some species of nematodes are lured to the roots of these plants, but once they are there, they are unable to lay eggs. Turning under the mari-... 

The simplest way to grow the vast majority of vegetables is from seed sown outdoors where the plants are to crop. Although you can raise young plants under cover (see p.260) for a head start, sowing directly into the soil is guick, easy and effective, and there are various techniques you can use to make best use of space. 

While allelopathy is not covered in this chapter, excellent weed control can be achieved at reduced herbicide rate when used in conjunction with allelopathic rice varieties. Therefore, selection of highly allelopathic crop varieties, either through traditional breeding or using genetic engineering techniques, may also provide novel and low input approaches to weed control. 

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