Analyses the main reasons for urea powdering according to actual urea production practice,such as production process,belt-conveying,bulk-storage and packing,and puts forward measures from the aspects of process improvement, storage enviroment modification and packing qual-ity adjustment to prevent urea powdering and increase the granularity.

Effects of starea on the digestion and metabolism of the stomachs in Hu shee;

Research Progress of Slow-release Starea;

As a result,the urea dusting efficiency was increased and operating environment was improved.

Research on mixture of urea and starch and size properties of urea starch;

Soil net N and C mineralization and urea transformation in agroecosystems across North China Plain;