Water resources cannot be separated from land resources in irrigated agriculture . 在灌溉农业中,水资源是不能和土地资源分开的。
Irrigation has been used where needed and modern chemical to control weeds . 需水的地方有了灌溉设施,并且采用了现代化学药剂以控制杂草。
Substantial amounts of land may have to be converted from irrigated to dryland farming systems . 大量土地可能不得不从灌溉转为旱地耕作。
This irrigation project requires a highly developed technical and interpretive expertise . 这项灌溉工程需要高度发展的技术和说明的专门知识。
In india's punjab, thousands of irrigation wells were dug between 1967 and 1972 . 在印度的旁遮普邦,1967-1972年之间打了成千上万口灌溉用井。
Some plains rivers regularly fertilize and irrigate surrounding areas with their floods . 有些平源河流不断地以其洪水培肥和灌溉着周围的地区。
This irrigation project can't prove out until a great deal more money is spent on it . 这灌溉工程还不能证实有预期的效果,除非花上更大一笔钱。
This issue is explored further in the next chapter in the context of irrigation projects . 这个问题将在下一章有关灌溉项目的论述中进一步讨论。
Many farmer 's fields are irrigated by water brought from a river or lake through bamboo pipes . 很多农民的田地是通过竹管从河流或湖泊中引水灌溉的。
Apple trees have been largely replaced by pear trees in the rogue river valley and the nonirrigated willamette valley . 在Rogue河河谷和不灌溉的Willamettee河谷,许多苹果树换成了梨树。