Wheat
Sugar beet Beans
Potato
Crop rotation in Tokachi
Prevent the decrease in yield.
Keep the soil fertility.
Suppress the crop disease and pest
damage.
Peaks of field works can be shifted.
Minimize the risk of yield fluctuation.
Decrease the weeds.
Japan, Hokkaido, and Tokachi
0 50,000 100,000 150,000 200,000 250,000
Wheat
(2010) Potato
(2009) Soybean
(2010) Red bean
(2010) Kidney bean
(2010) Sugar beet (2010)
Cultivated area of main crops (ha)
Japan Hokkaido Tokachi
0 10 20 30 40 50 60 70 Tokachi (%) 80
0 500 1,000 1,500 2,000 2,500
1960 1970 1980 1990 2000 2010 2020
Wheat Potato Soy bean Adzuki bean Sugar beet
Sugar beet Potato
0 50 100 150 200 250 300 350
1960 1970 1980 1990 2000 2010 2020
Total yields of major crops (1,000 Mg) in Tokachi
Wheat Soy bean Adzuki bean
Wheat
Transplanting seed potato:
end of April – early May Harvest:
August - September
July 10, 2020 September 8, 2020 Variety: Kita-akari
0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000
1960 1970 1980 1990 2000 2010 2020
Unit yields of major crops (kg/10a) in Tokachi
Wheat Potato Soy bean Adzuki bean Sugar beet
Sugar beet
Potato
kg/1000 m 2
Wheat
0 100 200 300 400 500 600 700 800
1960 1970 1980 1990 2000 2010 2020
Wheat Soy bean Adzuki bean
Wheat
Number and cultivation area of farms in Tokachi
Farm number Cultivation
area
1965
1945
1925
1897 1990
Acreage (ha) Farm number
decreased in Tokachi?
• Merit of large scale operation of agriculture.
• Necessary man power decreased, as
agricultural machinery was introduced.
• For efficient farm management, small farm lands had to be combined into a large field.
• Outflow of the excess labor force to
industrial, commercial, and civil service.