TOEFL kelimeleri

become or make food unusable

变质；使食品变质

device that sprays water over land

喷灌器；洒水器

crop providing a major part of a population diet

主粮作物；主要食用作物

farming mainly to feed the farming household

自给农业；以满足农户自身食物需求为主的农业

irrigation by water flowing over the ground

地面灌溉

harvest level compatible with long term resource renewal

可持续产量；不损害资源长期更新能力的采收量

wood grown or prepared for building and other uses

木材；用材林木

upper layer of soil

表层土；表土

place growing young trees for planting elsewhere

林木苗圃

swollen plant organ that stores food

块茎或块根等贮藏器官

soil condition with excess water and insufficient air

土壤渍水；因水分过多导致的根区缺气状态

remove unwanted plants

除草；清除杂草

fibrous wood material used to make paper

木浆

amount of a crop produced

作物产量；单位面积产量