Key Concepts: 1  Legumes (family Fabales) develop root nodules that harbour Rhizobium bacteria (rhizobia). 2  Endosymbiotic bacteria (bacteroids) convert nitrogen to ammonia (biological nitrogen fixation). 3  Legume crops restore fertility to agricultural soils by capturing nitrogen from the atmosphere.
6.Gold gives extra sheen to the body: A person wearing a moderate amount of gold in the form of simple jewelry looks gorgeous. The color and soft shine of the gold is enticing. Gold has the malleability that helps to make beautiful jewelry, wearing of which gives a stunning appearance to the person wearing it. 7. Lowers arthritis symptoms:
Platinum is a silver metal commonly used to make jewelry, which is a good option for a 20th anniversary gift. Platinum rings are available for both men and women. Platinum is also used in necklaces, bracelets, earrings and cufflinks. For couples who cannot afford to buy jewelry, there are still ways to incorporate platinum into the gift.