Table 5 Crop group categorisation used in the study, and 72 crops that were studied

Cereal grains

Barley, oats, rice, maize, wheat, rapeseed, sorghum, millet, safid muesli, teff/annual bunch grass

Fruits

Watermelon, peach, guava, apple, mango, pineapple, lemon, orange, plantain, grape, banana, pear, plum

Legumes

Chickpea, soya bean, mung bean, faba bean, jack bean, french bean, locust bean, alfalfa, hairy and milk vetch, cowpea, peanut/groundnut

Vegetables

Gourd, aubergine, pumpkin, cucumber, chilli, green pepper, lettuce/chicory

Grasses

Sugarcane, caster, agave, tifton, napier, grass pea, guina grass, italian ryegrass, pangola grass, congo grass, carribean stylo, beard grass

Tubers

Sweet potato, potato, carrot, cassava, yam