CONCENTRATION OF K, CA AND MG IN SATURATION EXTRACT IN RELATION TO EXCHANGEABLE K, CA AND MG

[11] MENGEL K, 1969, LANDWIRT FORSCH, V23, P79

[12] A pressure-membrane extraction apparatus for soil solution [J]. SOIL SCIENCE, 1941, 51 (01) : 377 - 386

[13] SCHACHTSCHABEL P., 1961, Landwirtschaftliche Forschung (Sonderheft), V15, P29

[14] SCHEFFER F, 1966, LEHRBUCH BODENKUNDE, P149

[15] VAN SCHOUWENBURG J. CH., 1963, NETHERLANDS JOUR AGRIC SCI, V11, P13

[11] MENGEL K, 1969, LANDWIRT FORSCH, V23, P79

[12] A pressure-membrane extraction apparatus for soil solution [J]. SOIL SCIENCE, 1941, 51 (01) : 377 - 386

[13] SCHACHTSCHABEL P., 1961, Landwirtschaftliche Forschung (Sonderheft), V15, P29

[14] SCHEFFER F, 1966, LEHRBUCH BODENKUNDE, P149

[15] VAN SCHOUWENBURG J. CH., 1963, NETHERLANDS JOUR AGRIC SCI, V11, P13