Dirk van der Eijk. (1998). Phosphate fixation and the response of maize to fertilizer phosphate in Kenyan soils. The Netherland: Wageningen University.
Dyfyniad Arddull ChicagoDirk van der Eijk. Phosphate Fixation and the Response of Maize to Fertilizer Phosphate in Kenyan Soils. The Netherland: Wageningen University, 1998.
Dyfyniad MLADirk van der Eijk. Phosphate Fixation and the Response of Maize to Fertilizer Phosphate in Kenyan Soils. The Netherland: Wageningen University, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.