Sun Songlin

Experimental study on tobacco seedling transplanting and seedling standing using 2ZY-1 transplanting machine

Four factors including the moisture content,seedling height,tobacco planting depth and transplanting speed,which influence the standing angles of seedlings transplanted by type 2ZY–1 tobacco transplanting machine,were analyzed by single factor and orthogonal tests.The result shows that planting depth exhibits the greatest impact on seeding standing,followed by soil moisture content,transplanting speed and the seedling height.Orthogonal test shows that under the moisture content of 30%,planting depth of 10 to 12 cm,seedlings height of 20 cm and transplanting speed of 1.0 m/s,the highest rate of seedlings with good standing angles is obtained.

Application of DC Electric Dynamometer in the PTO Power Test of Tractors

Test of bench performance to the power of tractor PTO (power take-off ) is a necessary way to evaluate the economic and dynamic performance. So the bracket of engine bench testing is essential equipment, and the effect of DC electric dynamometer used in PTO power test is investigated in this paper. Realizing the process to achieve automatic control and automatic recording, thus greatly reducing the labor intensity of testing personnel and the human error in the testing process, but also greatly increased the accuracy of the test results.