Absorption of nitrogen from mineral fertilizers by soil microflora and its utilization by plants
Tarvis, T.V., 1973: Absorption of nitrogen from mineral fertilizers by soil microflora and its utilization by plants. The use of the stable isotope 15N in agricultural research: Primenenie stabil' nogo izotopa 15N v issledovaniyakh po zemledelyu: 91-100
Barley plants utilized about 7-35% of the total N fixed in soil by micro-organisms.