The characteristics of drought and construction of drought-resistant and relievable farming system on the arid area of the Loess Plateau in the middle and east Gansu province

The countermeasures for development of precipitation potential productivity in dryland areas in Tianshui;

The dry land agricultural production in the mountainous and arid area plays an important role in Beijing.

The expert system development of chemical water-saving in the arid agriculture areas;

Mechanism of yield formation and decrease of winter wheat yield in bed-planting in rain-fed areas;