8Dr R Manian. Development and evaluation of an active-passive tillage machine[J]. AMA, 2001,33(1):16-22.
9桑正中.农业机械学(第2版)[M].北京:机械工业出版社,1986:120-142.
10Salokhe V M, Ramalingam N. Effects of direction of rotation of a rotary tiller on properties of Bangkok clay soil[J]. Soil and Tillage Research, 2001,63 (1 - 2) : 65 - 74.