%0 Journal Article %T A DIFFUSION AND MASS-FLOW CONCEPT OF SOIL NUTRIENT AVAILABILITY %A BARBER, STANLEY A. %A , %J Soil Science %V 93 %N 1 %P 39-49 %@ 0038-075X %D 1962-01-01 %I Ovid Technologies (Wolters Kluwer Health) %~ DeepDyve