Technological and ecological limitations to production of food crops.
D000383:Agriculture / Q000379:methods; D000818:Animals; D002980:Climate; D004044:Dietary Proteins; D004463:Ecology; D004777:Environment; D005308:Fertilizers; D005523:Food Supply; D005823:Genetics; D006801:Humans; D007313:Insecta; D010935:Plant Diseases; D010940:Plant Proteins; D011891:Rain; D012586:Science; D012987:Soil; D013045:Species Specificity
D004044:Dietary Proteins; D005308:Fertilizers; D010940:Plant Proteins; D012987:Soil