No-till agriculture, an agronomic practice in which farmers do not plough up the land but leave part of the previous year's crop on it, also preserves water.
免耕农业是一种农艺实践，农民不翻耕，而是将前一年的作物留在土地上，这同时也可以蓄水。
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They are getting a lot more efficient; they have a lot better crop genetics and agronomic practices like no-till farming and things like GPS [satellite-dependent global positioning system].
In this system, there are basic farming land geographic information, agronomic knowledge, crop fertilizer needing mathematics models, and data analysis methods.