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1	The Isolation of Some Nonsymbiotic Nitrogen Fixing Organisms Occurring in Some Utah Soils Johnson, Richard B. 01 May 1941 (has links) Plants require ten elements in appreciable quantity and several others in smaller amount for their continued and normal growth. Three of these necessary elements, nitrogen, phosphorus, and potassium are most important because they occur in the soil in quantities which are usually small in proportion to that needed by the plants. Of these three, nitrogen is in most cases the limiting factor because of the ease with which in may be leached from the soil and comparatively large amount assimilated by plants. These factors coupled with the inhibiting high cost of artificially replacing it in the form of commercial fertilizers, make its conservation and efficient utilization of the utmost importance. symbiotic nonsymbiotic nitrogen isolation organisms Medicine and Health Sciences Organisms Plants
2	Nitrogen response efficiency, nitrogen retention efficiency, and asymbiotic biological nitrogen fixation of a temperate permanent grassland site under different sward compositions and management practices Keuter, Andreas 08 January 2013 (has links) No description available. 333 577 nitrogen retention efficiency nitrogen response efficiency asymbiotic biological nitrogen fixation free-living nitrogen fixation nonsymbiotic nitrogen fixation grassland functional diversity biodiversity species richness nitrate leaching nitrous oxide emission dissolved organic nitrogen gross N mineralization net N mineralization immobilization

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The Isolation of Some Nonsymbiotic Nitrogen Fixing Organisms Occurring in Some Utah Soils

Nitrogen response efficiency, nitrogen retention efficiency, and asymbiotic biological nitrogen fixation of a temperate permanent grassland site under different sward compositions and management practices