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Rice is usually grown in N-deficient soils, demanding that the element be supplied to the field by commercially available N fertilizers. Unfortunately, a substantial amount of the urea-N or NO 3 -N applied as fertilizers is lost through different mechanisms, causing environmental pollution problems. Utilization of biological N 2 fixation (BNF) technology can decrease the application...
Drosera villosa var. villosa A. St.-Hil is a carnivorous plant that grows in Brazilian flooded soils very poor on nutrients, including low levels of N. Under these conditions, the plant shows vigorous growth, low root number, low number of captured prey (less than 50%) and a great assemblage of bacteria associated with the roots and leaves that grow in N-free medium. These preliminary results have...
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