Robuta

https://scholarspace.manoa.hawaii.edu/items/50d58ec8-8237-4bb6-b9fd-4f1880f1c2b0 Alley cropping as a soil nitrogen management practice for maize production Tropical maize yields are low, averaging 1.24 t/ha, compared to a 3.2 t/ha world average and a 6.3 t/ha average in the United States and Europe. Alley cropping... alley croppingnitrogen managementsoil