Study on operation factors of the disc Harrow digging cassava that affects the ability to work of digging and include cassava Fund. Study in the April harvest season. Field test in the area. Amphur Muang, Khon Kaen, big red has the characteristics of the soil in sand soil contamination test conversion, ruan. Cassava varieties are varieties of Rayong 5, which in this test is a test to study specific factors to dig cassava head that affect the operation of the release only.
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