Available nitrogen in soils and its determination by the ‘Nmin-method’ and by electroultrafiltration (EUF) K. Mengel OriginalPaper Pages: 251 - 262
Recovery of15N-labelled urea: Influence of zero tillage, and time and method of application S. S. MalhiM. Nyborg OriginalPaper Pages: 263 - 269
Comparison of five soil testing methods to establish phosphorus sufficiency levels in soil fertilized with water-soluble and sparingly soluble-P sources A. BationoW. E. BaethgenA. U. Mokwunye OriginalPaper Pages: 271 - 279
Partially acidulated reactive phosphate rock (PAPR) fertilizer and its reactions in soil D. C. GoldenR. E. WhiteR. B. Stewart OriginalPaper Pages: 281 - 293
Partially acidulated reactive phosphate rock (PAPR) fertilizer and its reactions in soil D. C. GoldenR. B. StewartR. E. White OriginalPaper Pages: 295 - 304
Residual effects of phosphate fertilizers in relation to phosphate sorptivities of 27 soils I. C. R. HolfordG. J. Crocker OriginalPaper Pages: 305 - 314
Influence of modified forms of urea and nitrogen levels on weed growth and grain yield of lowland rice R. VenkitaswamyS. SubramanianV. Veerabadran OriginalPaper Pages: 315 - 321
Urea briquette applicator for transplanted rice N. K. SavantP. S. OngkingcoP. J. Stangel OriginalPaper Pages: 323 - 331
Characterization of humified substances in organic fertilizers by means of analytical electrofocusing (EF): A first approach M. GoviC. CiavattaP. Sequi OriginalPaper Pages: 333 - 339
Humic fertilizers by oxiammoniation of hydrolyzed olive pits residues F. A. RieraR. AlvarezJ. Coca OriginalPaper Pages: 341 - 348