Nitrogen and potassium requirement of pineapple in relation to irrigation in Nigeria S. N. Asoegwu OriginalPaper Pages: 203 - 210
An evaluation of water extraction as a soil-testing procedure for phosphorus I. Glasshouse assessment of plant-available phosphorus P. Sorn-SrivichaiJ. K. SyersI. S. Cornforth OriginalPaper Pages: 211 - 223
An evaluation of water extraction as a soil-testing procedure for phosphorus II. Factors affecting the amounts of water-extractable phosphorus in field soils P. Sorn-SrivichaiJ. K. SyersI. S. Cornforth OriginalPaper Pages: 225 - 236
Efficiency of urea and ammonium sulfate for wetland rice grown on an acid sulfate soil as affected by rate and time of application Sakorn PhongpanSorasith VacharotayanKikuo Kumazawa OriginalPaper Pages: 237 - 246
Foliar NPKS application to cotton from full flowering to boll filling J. HalevyT. Markovitz OriginalPaper Pages: 247 - 252
The residual value of superphosphate and rock phosphates for lateritic soils and its evaluation using three soil phosphate tests M. D. A. BollandR. J. GilkesD. G. Allen OriginalPaper Pages: 253 - 280
Reaction of iron and aluminium phosphate ores with sulphuric acid and various salts G. S. Walker OriginalPaper Pages: 281 - 293