The study on biomass composition dynamics of community in degenerated steppe of Leymus chinensis after shallow ploughing;

chinensis after shallow ploughing (1983￣1993) is reported.

chinense after shallow ploughing.

Having analyzed the quadrat data of several years,the paper studied the dynamic rules of biodiversity during restoration process of grassland after shallowly ploughing,and also studied the main plant populations which caused the changes.

The biodegradation rates of petroleum hydrocarbons in polluted soil of Zihe Valley, Shandong Province, China, were studied for three different experimental conditions: 1) injecting of microbes into the soil; 2) tilling and adjusting humility; and 3) both processes applied together.

Effect of Fertilization and Ploughingin Reed Field on Reed Yield;

Effects of Ploughing on Controlling Redroot,Amaranth and Common Crabgrass Barnyardgrass;

Experiments of equipping Hangfu model 1PGC 1 paddy field boat with a share plough were conducted to promote efficiency of ploughing and aviod making mud deep when ploughing.

The Influence of Tillage on CH_4 and CO_2 Emission Flux in Winter Fallow Cropland;

Studies on the relationship between tillage in autumn and occurrence degree for wheat stripe rust of volunteer seedlings

Through the field test on rape-paddy fields and wheat-paddy fields in foothills in Central Hilly Area of Sichuan (take Xinhe village in Jianyang as an example)which are applied under the different tillages and same fertilization condition, the dynamic changing feature of NH_4~+-N、NO_3~--N in the leakage water and surface water are analyzed with the self-designed lysimeter.