Avascular necrosis (AVN) of the hip is an abnormal and possibly crippling condition in which blood cannot get to the hip bone. When the blood supply to the bone is blocked, the area without blood supply can die. This may lead to collapse of the bone requiring replacement with an artificial hip joint.
Nitrogen Fixing Trees for Permaculture Flowers of the leguminous tree, Kowhai, the national flower of New Zealand Nitrogen fixation is a pattern of nutrient cycling which has successfully been used in perennial agriculture for millennia. This article focuses on legumes, which are nitrogen fixers [â¦]
Nitrogen is one of the most important chemical elements for plants. If there is not enough nitrogen available in the soil plants look pale and their growth is stunted. Nitrogen fixing plants are called legumes. Legumes - and all peas and beans are legumes - are plants that work together with nitrogen fixing bacteria called Rhizobia, to fix nitrogen. The Rhizobia chemically convert the nitrogen from the air to make it available for the plant. Legume plants live in a symbiotic relationship with the nitrogen fixing bacteria - the Rhizobia live in nodules in the plant's roots. This way the plant can look after its own nitrogen needs. Fertilizer is not required.