During the whole growth season, the total runoff loss of N.

Through the testing-hole and rice-fields pa ra digm experiment,the rul e of runoff loss of fertilizing-N and controlling cou ntermeasures in rice fields in th e upstream area of HuangPu River wate rshed we re studied.

Fault tolerance on path failure in delay tolerant network

Then Monte Carlo method was utilized to analyze the reliability of RC eccentric compression columns after high temperature under comprehensive considering failure paths.

Effects of controlled release nitrogen fertilizer on surface water N dynamics and its runoff loss in double cropping paddy fields in Dongtinghu Lake area;

According to the research results of the farmland soil nitrogen transport and transformation mechanisms home and abroad currently,the damages of environmental pollution causing by soil nitrogen runoff loss have been recollected briefly,furthermore,influencing factors of soil nitrogen runoff loss have been deeply analyzed in the paper.

Through the study of plot runoff resource,3 herb vegetation types,3 shrub vegetation types and 3 arbor vegetation types in loess hilly region,.

Based on plot test of piling up top soil, the impacts of runoff on land productivity of sloping field is researched in Xiji county, semi arid hilly and gully region of the loess plateau.