The fertiliser economy of high producing pastoral systems K. R. Middleton OriginalPaper Pages: 5 - 27
Twenty-five years of phosphate and potassium fertilization of a crop rotation Stanley A. Barber OriginalPaper Pages: 29 - 36
Phosphorus availability from partial acidulation of two phosphate rocks L. L. HammondS. H. ChienJ. R. Polo OriginalPaper Pages: 37 - 49
Changes in quantity of mineral nitrogen in three grassland soils as affected by intensity of nitrogen fertilization W. H. Prins OriginalPaper Pages: 51 - 63