2006-09-16 01:38:02 · 5 answers · asked by Khajan joshi 1 in Science & Mathematics ➔ Biology
Legumes have nodules on roots in which symbiotic nitrogen fixing rhizobium bacteria are present. Other plants do not have such mechanism of nitrogen fixing hence they have to rely on other sources of nitrogen. When leguminous plants ploughed in soil the fixed nitrogen become available to other plants as ready made fertilizer. Hence it is done.
2006-09-16 01:46:14 · answer #1 · answered by smalleyessharpviews 3 · 2⤊ 0⤋
The legumes are fix nitrogen into the soil , which in turn helps the crops to grow
2006-09-16 04:32:14 · answer #2 · answered by Neil D 2 · 0⤊ 0⤋
Plants of leguminaecae family contain nitrogen as a result the soil fertility get increase this is called rotation of crops
2006-09-16 13:50:24 · answer #3 · answered by moosa 5 · 0⤊ 0⤋
As i remember they have symbiotic nodules on them that synthesize nutrients and put good things back into the soil making it better for the next crops.
2006-09-16 01:41:13 · answer #4 · answered by Bebe 4 · 0⤊ 0⤋
farmers often grow favas as biomass and plow them back into the soil at maturity, enriching the tilth of sandy or clay type soils.
2006-09-16 01:51:43 · answer #5 · answered by jrsgurl62 4 · 0⤊ 0⤋