@ARTICLE {WORTMANN:2021, title = {Perennial grass ley rotations with annual crops in tropical Africa: a review}, author = {Wortmann, C. S. and Bilgo, A. * and Kaizzi, C. K. * and Liben, F. * and Garba, M. and Maman, N. K. * and Serme, I. * and Stewart, Z. P. }, journal = {Agronomy Journal}, year = {2021}, pages = {1--7}, issn = {0002-1962}, note = {WAHub; First published 18 February 2021}, url = {https://doi.org/10.1002/agj2.20634}, doi = {10.1002/agj2.20634}, }