The objective of this study is to use advanced electronic and computer technology to design a practical and economical variable rate irrigation control system according to the actual conditions in rural areas of China.

Owing to the difference of soil water in the farm, variable rate irrigation can save water as well as raising economy benefit.

The precision diagnosis technique of plant water for precise irrigation;

With respect to application bases and advanced technologies,the study priorities include on-farm soil-and-water management,decision-making on water-saving in irrigation districts,decision-making on forecasting of precise irrigation,precise control of surface irrigation,efficient water-and-fertilizer u.

Effects of limited irrigation and phosphorus on growth and water use of winter wheat;

Effects of limited irrigation on water use of winter wheat;

Effects of limited irrigation on water and nitrogen transport and use in spring wheat rootzone soil in Shiyang River basin;

Design and application of the model for precision irrigation decision-making by adopting infrared crop canopy temperature;

Preliminary study on precision irrigation system based on wireless sensor networks of acoustic emission technique for crop water stress;

Review of indices for precision irrigation decision-making;

845 7 and was positively correlated with the irrigation amount of brackich water with r =0.

The monthly change of suerose,glucose,fructose,sorbose,and inositol and the timber amounts among the forests which under different irrigation amount,have been determined.

The effects of nitrogen rate and irrigation amount on yield were studied in field and concrete pools.