Economies of Size for Conventional Tillage and No-till Wheat Production

Table 4. Machinery Complements for Conventional Tillage and No-till Wheat Production

Systems for Alternative Farm Sizes__________________________________________________

_________Machine______	Machine Width (Feet)	Field Speed (MPH)	Field fficienc (%) ^	Draft / ft. of y Implemen^t Conventional		No-till
_________Machine______	Machine Width (Feet)	Field Speed (MPH)	Field fficienc (%) ^	(Lbs.)	Tillage	No-till
________________________________320-Acre Farm________________________________
95 hp Tractor					≠	≠
Moldboard Plow	4.75	4.5	85	1250	≠
Chisel	8.55	5	85	625	≠
Disk	10.48	6	80	425	≠
Conventional-Till Drill	10	5	70	225	≠
No-Till Drill	10	5	70	400		√
640-Acre Farm
155 hp Tractor					≠	≠
Moldboard Plow	7.75	4.5	85	1250	≠
Chisel	18.6	5	85	625	≠
Disk	17.1	6	80	425	≠
Conventional-Till Drill	20	5	70	225	≠
No-Till Drill	20	5	70	400		√
________________________________1,280-Acre Farm________________________________
95 hp Tractor						≠
Sprayer	40	6.5	65	200		≠
Fertilizer Spreader	40	7	70	200		≠
155 hp Tractor					≠	≠
No-Till Drill	20	5	70	400		≠
Conventional-Till Drill	20	5	70	225	≠
Sprayer	60	6.5	65	200	≠
Fertilizer Spreader	40	7	70	200	≠
170 hp Tractor					≠
Moldboard Plow	8.5	4.5	85	1250	≠
Chisel	20.4	5	85	625	≠
Disk__________________	18.75	6	80	425	√