Study on a combined operator for both rototilling and tillage

A kind of technique combined rototilling with tillage is discussed in the paper.The(composite) operation includes complete rototilling,stubble breaking on ridge,layer subsoil fertilizing,furrowing and seeding,hilling or ridge breaking,chiseling and rolling to meet the needs of dry (farming) in the north of China.The overall configuration and the main parts of the combined operator are also worked out.