1973 年 35 巻 2 号 p. 200-206
The energy requirments for tilling or padling work can be obtained by summing up the each energy requirment for the unit operation costitute the work.
Topographical conditions of the field and the operation will act upon the energy requirment very strngly.
The energy requirment per 10a for tilling work by rotark tiller was 596.3 Cal at plain field, 658.9 Cal at piedmont field, and 879.0 cal at mountainous field respectively.
E/10a for paddling work by rotary tiller was 499.6 Cal at plain field, 646.6 Cal at piedmont field, and 654.4 Cal at mountainous field.
E/10a for tilling work at piedmont field by larg tractor with rotary was 264.4 Cal and E/10 a by medium size tractor was 333.4 Cal.
E/10a for puddling work at plain field by larg tractor with rotary (3 labourors) was 198.0 Cal, and by medium size tractor (2 labourors) was 186.8 Cal.