ارزيابي و مقايسه ميزان انرژي مورد نياز در روشهاي مختلف خاك ورزي ذرت

Evaluation and comparsion of energy requirements in different tillage methods for corn production

In order to evaluate and compare the energy requirements in different tillage methods for corn production, three moldboard plow- based tillage systems were compared with a chisel plow-based tillage system, in different soil moisture regimes at Darab Agricultural Research Station during 1998. The experimental design was a randomized complete block design with five replications and four treatments. Ground speed, time used, draft, fuel consumption and the rate of drawbar energy used for primary and secondary tillage operations were measured and used as performance index. Results obtained from the experiment showed that the rate of soil moisture content during primary tillage operation had a significant effect on performance index of implements. Maximum rate of fuel consumption, draft. drawbar power and drawbar energy used, was occurred when primary tillage operation was done by moldboard plow in 8165% moisture content, and the minimum was occurred when primary operation was done by chisel plow in moisture content of 16 to 18%. Analysis of the data showed that in treatments having moisture content less than 10%, the performance index of disk harrow and leveler were more than in those treatments with moisture content between 16 to 18%. The results also revealed that there arc significant differences between fuel requirements, time and drawbar energy used in four corn tillage systems.