1. Potassium potential of some selected soils;Acquaye;Can. J. Soil Sci.,1966
2. Anderson , M. S. Keyes , M. G. Cramer , G. W. 1942 Soluble materials of soils in relation to their classification and general fertility 813
3. Arnold , P. W. 1962 The potassium status of some English soils considered as a problem of energy relationships 25 35
4. Potassium status: soil measurements and crop performance;Arnold;Trans. 9th Int. Congr. Soil Sci.,1968
5. The importance of the depth of soil sampling to studies relating to the mineral content of pastures;Askew;N.Z. J. Sci. Technol,1932