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在加拿大萨斯喀彻温省的Ｓｃｏｔ粉壤至粘壤地上，进行了１２年的产品价格与投入成本对９种种植制度经济行为及其风险的评价。轮作包括硬红春麦（Ｗ）和油用甘蓝（Ｃ）２个两年休闲（Ｆ）－种植制；小麦、油菜和大麦（Ｂ）组成的４个３年休闲－轮作；１个４年和１个６年的苜蓿—小麦轮作与１个小麦连作。除牧草地不施肥外，其余作物都按该地区施肥指南施用Ｎ、Ｐ肥。４种轮作（Ｆ—Ｃ、Ｆ—Ｃ—Ｗ、Ｆ—Ｃ—Ｂ和Ｆ—Ｗ—Ｗ）都在多数价格方案下表现出良好的经济行为与风险。Ｆ—Ｗ和Ｆ—Ｗ—Ｂ轮作基本处于中间位置，净收益平均比那些最佳种植制在１９９４年商品价格水平下约低１１％，但是，在粮价低于常年价７５％时，Ｆ—Ｗ和Ｆ—Ｃ的净收益最高。当油菜价与麦价比率超过１．８时，可用油菜取代小麦休闲种植；当大麦／小麦价比超过０．７５时，用大麦取代小麦残茬种植；只有当苜蓿干草／小麦价比超过０．８时，才可将苜蓿纳入轮作中。休闲地上生产小麦的平均单位成本为９１／ｔ；油菜茬上生产小麦的单位成本为１０６／ｔ；小麦茬休闲地为１１６／ｔ；连作小麦地为１３３／ｔ；同样地，油菜茬地上生产大麦的平均单位成本为７４／ｔ，小麦茬地为８３／ｔ。由此，我们可以得出在萨斯喀彻温?
In the Saskatchewan Saskatchewan Saskatchewan to clay soil on the ground, conducted a 12-year product price and input costs of nine planting system economic behavior and its risk assessment. The rotation consists of two two-year leisure (F) -substation systems of hard red spring wheat (W) and oil with cabbage (C); four 3-year leisure-rotation crops of wheat, A six-year-old alfalfa-wheat rotation is made with a wheat crop. Except for no fertilization on pasture, all other crops were applied N and P fertilizers according to the fertilization guidelines in the area. The four rotations (F-C, F-C-W, F-C-B and F-W-W) all showed good economic behavior and risk under most price scenarios. F-W and F-W-B basically in the middle of the rotation, the average net income than those best cropping system in 1994, about 11% lower commodity prices, however, when the grain price is lower than 75% of the annual price, F -W and F-C net income highest. When the ratio of rapeseed price to wheat price exceeds 1.8, rape can be used instead of wheat for leisure planting; when barley / wheat price ratio exceeds 0.75, barley replaces wheat stubble planting; only when alfalfa hay / wheat price ratio exceeds 0 When 8, the alfalfa can be put into rotation. The average unit cost of leisurely producing wheat on the ground was 91 and the unit cost of producing wheat on stubble was 106. The cost per unit for the wheat crop was 116. Wh / The average unit cost of barley production on rapeseed crop is 74 / / t for wheat and 83 / / t for stubble on wheat. So, can we come to Saskatchewan?