... four-wheel tractor 4.work efficiency:2.35hectare/h 2012 Most useful JY-4U60 model potato harvestorProduct description The machine ... ,leakage soil fast, simple construction,long service life.The most important is that the machine can directly extracte the agricultural ... website, if you have any questions, please contact me,i will online within 24hours. 2012 Most useful JY-4U60 model potato harvestor