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wind effects frost temperature water requirements light water-logging meteoric events photoperiod water cycle abiotic components ranching crop husbandry field crops animal husbandry slash-and-burn subsistence farming undegraduates. agricultural regions horticulture shifting agriculture industrial crops mixed cropping pastoral nomadism commercial agriculture dairy farming market gardening rice-dependent farming arable farming cereal growing types of farming farming systems tissues animal anatomy plant anatomy cells taxonomy classification biology linneaus nomenclature biodiversity darwin evolution