Model Leafy vegetable Amaranthus spp Xanthosoma spp. r2 RMSE X2 r2 RMSE X2 MR = exp (-kt) 0.9236 0.1017 0.0100 0.9343 0.0914 0.0084 MR = exp (-kty) 0.9917 0.0349 0.0012 0.9905 0.0363 0.0013 MR = exp (-kt)y 0.9236 0.1058 0.0100 0.9343 0.0951 0.0091 MR = a exp (-kt) 0.9483 0.0870 0.0070 0.9573 0.0767 0.0058 MR = a exp (-kt) + c 0.9699 0.0693 0.0046 0.9791 0.0561 0.0033

Table 2: Models and their respective r2, RMSE and X2 for Amaranthus spp. and Xanthosoma spp. leaves.