fertilization and irrigation level 施肥灌溉水平
Localized fertilization and irrigation 分层施肥与供水
economical fertilization and irrigation 经济施肥
treatment of fertilization and irrigation 水肥处理
Irrigation and fertilization system 灌溉施肥系统
dripping irrigation and fertilization 滴灌施肥
Drip irrigation and fertilization system 滴灌·施肥系统 ; 滴灌．施肥系统
Farmers in China have long used techniques such as fertilization and irrigation to make their land produce more.
中国的农民一直用技术如施肥和浇灌等手段来进步土地产量。
But in practical operating, the quantity and the timing of fertilization and irrigation can not be controlled exactly and optimally.
但是在实际操作中灌溉量、施肥量与灌溉和施肥的时机都不容易实现最优化控制。
Therefore, different fertilization and irrigation system in different development stages are needed to ensure the normal development of corn.
因此，在对玉米进行灌水和施肥时，针对不同生育期要有不同的施肥和灌水制度，才能满足玉米正常的生长发育。
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