Evaluation of the efficacy of Malawi Tundulu phosphate rock for maize production J.W. WendtR.B. Jones OriginalPaper Pages: 161 - 170
Differential influence of soil pH on the availability of partially sulphuric and phosphoric acidulated phosphate rocks II. Chemical and scanning elecronmicroscopic studies S.S.S. RajanA. Ghani OriginalPaper Pages: 171 - 178
Agronomic and economic evaluation of Tilemsi phosphate rock in different agroecological zones of Mali A. BationoE. AyukM. Koné OriginalPaper Pages: 179 - 189
Effect of crop residues on grain yield response of sorghum (t Sorghum bicolor) (L.) to application of N and P fertilizer Asfaw BelayHeluf GebrekidanEylachew Zewdie OriginalPaper Pages: 191 - 196
Timing of N fertilization on N2 fixation, N recovery and soil profile nitrate dynamics on sorghum/pigeonpea intercrops on Alfisols on the semi-arid tropics Joseph J. Adu-GyamfiO. ItoK. Katayama OriginalPaper Pages: 197 - 208
Direct and residual fertilizer phosphorus effects on yield and phosphorus efficiency of upland rice in an Ultisol K.L. SahrawatM.P. JonesS. Diatta OriginalPaper Pages: 209 - 215
Relationship of seed boron concentration to germination and growth of soybean (t Glycine max) B. RerkasemR.W. BellJ.F. Loneragan OriginalPaper Pages: 217 - 223
Effect of organic manure and chemical fertilizer on nitrogen uptake and nitrate leaching in a Eum-orthic anthrosols profile Tong YananOve EmterydHarald Grip OriginalPaper Pages: 225 - 229
Compression testing of granular NPK fertilizers G.M. WalkerT.R.A. MageeN.A. Moffatt OriginalPaper Pages: 231 - 234
Production of defluorinated dicalcium phosphate from phosphate rock concentrate A.M.B. FreitasM. Giulietti OriginalPaper Pages: 235 - 240
Effect of digested sewage sludge on the efficiency of N-fertilizer applied to barley B. LasaM. QuemadaP.M. Aparicio-Tejo OriginalPaper Pages: 241 - 246
Effect of green manures on P solubilization and uptake from phosphate rocks A.R. ZaharahA.R. Bah OriginalPaper Pages: 247 - 255
