玛雅人发明了高效的农业体系，有深厚的天文学知识。
The Maya created an efficient agricultural system, had deep astronomy knowledge.
不同类型区农业资源高效利用的优化模式与技术体系的集成；
To integrate the technological system and the optimum models of the high efficient utilization of agricultural resources in different regions;
节水技术应优先发展耕作保墒、增施有机肥与秸秆覆盖还田技术、农业高效用水技术体系等。
The order of the development of water-saving technologies is: farming measure, organic farming with straw mulching technology, agricultural water technology system, etc.
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