what is a source of nitrogen for plants
Natural Sources of. Nitrogen. Some plants âmake their own. nitrogenâ. If a legume (i.e., soybeans, alfalfa, clovers) is colonized by certain. strains of Rhizobium bacteria, nodules. will form on the plant roots where the.
In addition to nitrogen fixed by. Rhizobium bacteria, other natural. sources that contribute to the soil. nitrogen include: mineralization of. organic matter and nitrogen released. as plant residues are broken down in. the soil. Animal waste is a good source. of natural nitrogen as well. Barnyard or poultry manure and. other animal waste products (e.g., bat guano) were used as a source of. supplemental nitrogen long before. inorganic nitrogen fertilizer came into. popular use.