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- [4] STUDIES ON SOIL POTASSIUM .I. CONFIRMATION OF RATIO LAW - MEASUREMENT OF POTASSIUM POTENTIAL [J]. JOURNAL OF SOIL SCIENCE, 1964, 15 (01): : 1 - &
- [5] BECKETT PHT, 1967, 8 T INT C SOIL SCI
- [6] BOLT G. H., 1963, SOIL SCI SOC AMER PROC, V27, P294
- [8] STUDIES ON SOIL POTASSIUM .3. CAT-ON ACTIVITY RATIOS IN ACID NIGERIAN SOILS [J]. JOURNAL OF SOIL SCIENCE, 1964, 15 (01): : 24 - +
- [9] STUDIES ON SOIL POTASSIUM .4. EQUILIBRIUM CATION ACTIVITY RATIOS + RESPONSES TO POTASSIUM FERTILIZER OF NIGERIAN OIL PALMS [J]. JOURNAL OF SOIL SCIENCE, 1964, 15 (01): : 35 - &
- [10] VAN SCHOUWENBURG J. CH., 1963, NETHERLANDS JOUR AGRIC SCI, V11, P13