Coated and modified urea materials for increasing nitrogen use efficiency of lowland rice in heavy clay soils B. Roy OriginalPaper Pages: 101 - 109
Manpower requirements for the fertilizer sector in sub-Saharan Africa Mohinder S. Mudahar OriginalPaper Pages: 111 - 122
Effect of phosphorus and potassium fertilizer on crop response and soil fertility in a long-term experiment Ren-Gang LiSA Barber OriginalPaper Pages: 123 - 136
The effect of particle size on North Carolina phosphate rock on its dissolution in soil and on levels of bicarbonate-soluble phosphorus IAK KanaboRJ Gilkes OriginalPaper Pages: 137 - 145
Fertigation versus broadcasting in an orange grove S. DasbergA. Bar-AkivaA. Cohen OriginalPaper Pages: 147 - 154
Crop response to fine and granular magnesium fertilizers J. J. MortvedtJ. J. Kelsoe OriginalPaper Pages: 155 - 161
Substitution rates as measures of the relative effectiveness of alternative phosphorus fertilizers J. D. ColwellW. J. Goedert OriginalPaper Pages: 163 - 172
Nitrogen requirements in young Douglas-fir of the Pacific North-west John TurnerMarcia J LambertStanley P Gessel OriginalPaper Pages: 173 - 179
Effect of level of application on the relative effectiveness of rock phosphate MDA BollandNJ Barrow OriginalPaper Pages: 181 - 192
Effect of granule size and the placement geometry on the efficiency of urea supergranules for wetland rice grown on a permeable soil J. C. KatyalBijay-SinghP. L. G. Vlek OriginalPaper Pages: 193 - 201