A Cure for Africa's Soil.
John P
JP
Reganold
Jerry D
JD
Glover
D000349:Africa; D000383:Agriculture / Q000379:methods*; D003247:Conservation of Natural Resources; D018556:Crops, Agricultural / Q000254:growth & development*; D005308:Fertilizers; D005523:Food Supply; D012987:Soil / Q000737:chemistry; D014197:Trees / Q000254:growth & development; D003313:Zea mays / Q000254:growth & development
D005308:Fertilizers; D012987:Soil