El Dessougi, H. I.H. I.El DessougiClaassen, N.N.ClaassenJohnston, A. E.2023-07-142023-07-142001https://resolver.sub.uni-goettingen.de/purl?gro-2/130357Potassium efficiency of crop species grown in the field on a K "fixing" soilconference_paper