Mobilization of non-exchangeable potassium and sodium in a calcareous soil during plant growth Robert L. FoxBurhan Kacar OriginalPaper Pages: 33 - 44
Earthworm activity and plant growth in artificial cultures J. A. Van Rhee OriginalPaper Pages: 45 - 48
Reactions between amino acid compounds and phenols during oxidation K. HaiderL. R. FrederickW. Flaig OriginalPaper Pages: 49 - 64
Influence of high and low exchangeable Mg and Ca percentages at different degrees of base saturation on growth and chemical composition of citrus plants J. P. MartinA. L. Page OriginalPaper Pages: 65 - 80
Factors controlling the efficiency of rock phosphates for potatoes and rye on humic sandy soils F. Van Der Paauw OriginalPaper Pages: 81 - 98
Die Aufnahme von Kohlendioxid durch die Pflanzenwurzel H. KickD. SauerbeckF. Führ OriginalPaper Pages: 99 - 111
Studies on the major-element deficiencies of the pigeon pea (Cajanus cajan) in sand culture R. Nichols OriginalPaper Pages: 112 - 126
The effect of sodium salts on the nitrogen, phosphorus, potassium, sodium and amino acid content of rice shoots G. Pálfi OriginalPaper Pages: 127 - 135
Forces involved in retention and movement of non-metabolic strontium inPhaseolus vulgaris Fred H. Emmert OriginalPaper Pages: 136 - 142