In the summer ripe fields of middle Zhejiang Province, 27 random sampling fields of 27 sites on different ecological conditions were surveyed in detail with seven scales by visualization of weed dominance to summer ripe to obtain the weed important value.

Quantitative analysis of weed communities of summer crops in Huoqiu County of Anhui Province;

The weed communities in 45 sampling sites composed of 358 summer crop fields in the northern and southern regions of Anhui Province were surveyed by visual scoring weed infestation level in seven scales.

Extended application of slow/controlled release fertilizers to field crop;

Field crop water-yield models and their applications

Comprehensive evaluation is made on crop consumptive use,specific yield,factor for output,water productivity,quantity of water saved and total benefit with deficit irrigation technical research results being used in field crop irrigation.

Effect of the Slow-control-Released Fertilizer Urea-Formal Dehyde on the Field Crops and Futher Industrial Approach;

The main problems of the bubbler irrigation applied in field crops are small water discharge,the big transection area of furrow and border.

Introduction of farmland north of the main weed species,number and the basic strategy of prevention,focusing on the main field crops such as corn,cotton,soybeans and sorghum,such as chemical weeding techniques and precautions.

A study on prediction method of optimal irrigation in major farmland of Inner Mongolia;