authors Mbuma, Ntombokulunga W. Gerrano, Abe Shegro Lebaka, Ntjapa Amoo, S. Mofokeng, A. Labuschagne, Maryke
published in Acta Agriculturae Scandinavica Section B: Soil and Plant Science Journal Acta Agriculturae Scandinavica, Section B — Soil & Plant Science Journal