00447nam a2200133Ia 4500 20251229183910.0 251229s9999 xx 000 0 und d THE S 667 .C8S54 Sigunga, D.O. Fertilizer nitrogen use effeciency and nutrient uptake by maize ( Zea mays L) in Vertisols in Kenya D.O Sigunga Wageningen Agricultural University 1977 Nitrogen, Fertilizers BK 514917 514917 0 0 0 0 AFR EGERTONLIB GEN 2025-12-29 0 THE S 667 C8S54 EGER234573 2025-12-29 18:39:10 2025-12-29 BK