CAMPBELL'S SOIL CULTURE MANUAL 297 



BY SCIENTIFIC SOIL CULTURE. 



Double disking in Juiy, one man, four horses, 45c an acre. . . . $45.00 



Harrowing twice over after rains, lOc per acre each time 20 .00 



Double disking in early spring 45 . 00 



Harrowing three times after rains 30 .00 



Plowing 7 inches deep in July 200 .00 



Subsurface packing, once over 25 .00 



Harrowing four times after rains 60 . 00 



Seeding with drills 40 . 00 



Thirty-four bushels seed wheat at $1 34.00 



Harrowing twice in spring with lever harrow 20 . 00 



Harvesting 60 .00 



Four hundred pounds twine at 14c 56.00 



Threshing 5000 bushels at 7c 350 .00 



Marketing, 3c 150.00 



Total expenses two years $1,135 .00 



Credit by 5000 bushels at 80o $4,000.00 



Less total expenses 1,135.00 



Profit $2,865.00 



BY ORDINARY METHOD. 



Plowing in August and September $200 .00 



Harrowing once 10 .00 



Seeding 40.00 



One hundred bushels seed 100 .00 



Harvesting 60 .00 



One hundred fifty pounds twine, 14c 21 . 00 



Threshing 1300 bushels 7c 91 .00 



Marketing, 3c 39.00 



Total expenses first year $561.00 



Same for two years 1,122 .00 



Yield first year 1300 bushels at 80c 1,040 .00 



Yield second 1300 bushels at 80c 1,040.00 



Total income for two years $2,080 .00 



Total expense two years 1,122.00 



Profit $958.00 



Net profit Campbell method one crop in two years $2,865.00 



Net profit old method two crops in two years 958 . 00 



Difference in favor of Scientific Soil Culture $1,907 .00 



