Source: https://www.researchgate.net/profile/Md-Wadud/publication/342380560_Performance_of_radish_and_coriander_under_Ipil-ipil_Leucaena_leucocephala_based_alley_cropping_system/links/5ef1d35e92851ce9e7fcde3a/Performance-of-radish-and-coriander-under-Ipil-ipil-Leucaena-leucocephala-based-alley-cropping-system.pdf