农业
人口危机population crisis
气候的不稳定性instability of climatic conditions
种植业crop cultivation
畜牧业livestock farming
乳品业dairy farming
园艺horticulture
小麦wheat
玉米corn, maize
棉花cotton
谷物grain
高粱sorghum
烟草tobacco
灌溉irrigation
天然肥料animal waste
化肥pesticide
杀虫剂pesticide, insecticide
轮种crop rotation
间种companion planting
牛cattle
奶牛cows
羊goat
兽群/牧群herd
鹿deer
驯化domesticate
家禽家畜domestic animals
草原prairie,pasture. Ranch
放牧graze
过度放牧over grazing
植被 vegetation
加速水土流失accelerated erosion
自给自足self-sufficient
犁plow