Claim · model-written summary
Nebraska soil series were established in definite categories with regard to pH, K and P status.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorDirectionValueQualifier
Verbatim
e4“Laboratory testing and field trials of fertilizers have established the important Nebraska soil series in definite categories with regard to pH, K and P status”
e3“Fertilizer yield response data for small grains in the case of phosphorus verified the laboratory observations”
Title
The Significance of Subsoil and Soil Series in Nebraska Soil Testing1
R. A. Olson; A. F. Dreier; R. C. Sorensen Agronomy Journal 1958. doi:10.2134/agronj1958.00021962005000040005x