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they grow many different varieties of crops. they also grow coffee
Nothing
They have nodules on the roots which has nitrogen fixing bacteria
In the nitrogen cycle.
They are all different types of crops. Wheat, oats, rice and corn are different types of cereal grasses, and soy is a legume crop.
Legume
Because there were only a few scant varieties to choose from for farmers to grow. It's different nowadays, as farmers have far more cultivars and varieties to choose from to grow in their fields.
Cereals, coarse grains, oilseeds, legumes, vegetables, fruit, nuts, fiber, and biofuel are a few crop examples.
There are many different kinds of forage crops that have the appropriate nutritional benefits to make hay for animals. Some include clover, alfalfa, birdsfoot trefoil, sanfoin, laspadenza, cicer milkvetch, and grasses include timothy, orchard grass, bromegrass, wheatgrass, ryegrass, fescue, and bluegrass. The different hay types include grass hay, legume hay, and grass-legume mix hay. The highest nutritional-type hay is legume, but the risks of legume-only hay is bloat, so grass-legume mix hay is the most popular type of hay that many livestock producers use. Grass hay is much better for horses because of the lower energy content as opposed to the legume hay.
a grain and a legume
D. J. Gilbey has written: 'Identification of weeds in cereal and legume crops' -- subject(s): Field crops, Identification, Weeds
Soil is important for crop production because the plants that yield crops are grown in soil. Different crops thrive in different types of soil, so it is important when choosing which crops to plant to select varieties that produce high quality and yield in the type of soil being used.