upland crop的用法和樣例：
例句
- It was difficult for upland crops to grow on the saline-alkali soil in the coastal plain and Liaohe river regions.
在沿海平原和遼河流域鹽堿土上很難種植旱地作物。 - Maize is a main upland grain and forage crop in Guangxi Zhuang Autonomous Region, which is mostly planted over the karst area and hilly belt.
玉米是廣西壯族自治區主要旱地作物和飼料作物，通常在喀斯特熔巖地區和山區種植。
