Does long contact with the soil improve the efficiency of rock phosphate? Results of isotopic studies Jean-Claude FardeauChristian MorelMichel Jahiel OriginalPaper Pages: 3 - 19
Effect of cation exchange on the distribution and movement of cations in soils with variable charge. I. Effect of lime on potassium and magnesium exchange equilibria I. R. PhillipsA. S. BlackK. C. Cameron OriginalPaper Pages: 21 - 30
Effect of cation exchange on the distribution and movement of cations in soils with variable charge. II. Effect of lime or phosphate on potassium and magnesium leaching I. R. PhillipsA. S. BlackK. C. Cameron OriginalPaper Pages: 31 - 46
Effects of different levels of chemical Nitrogen (urea) onAzolla and Blue-green algae intercropping with rice A. L. SinghP. K. SinghPushp Lata OriginalPaper Pages: 47 - 59
Effectiveness of applying urea solution by furrow irrigation to wheat grown on raised beds of an impervious red-brown earth C. J. SmithJ. R. Freney OriginalPaper Pages: 61 - 70
The use of feldspars as potassium fertilizers in the savannah of Colombia J. I. Sanz ScovinoD. L. Rowell OriginalPaper Pages: 71 - 83
Mineralization and nitrification of ureaform fertilizers C. B. ChristiansonM. F. CarterL. S. Holt OriginalPaper Pages: 85 - 95
Production of ammonium phosphate containing fertilizers from apatite unsuitable for the wet process K. Tennakone OriginalPaper Pages: 97 - 100
