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Economic and Risk Effects of Rotation Based on a 14-Year Irrigated Potato Production Study in Manitoba

Khakbazan, Mohammad, Mohr, RamonaM., Huang, Jianzhong, Campbell, Erik, Volkmar, KarlM., Tomasiewicz, DaleJ., Moulin, AlanP., Derksen, DougA., Irvine, ByronR., McLaren, DebraL., Nelson, Alison
American journal of potato research 2018 v.95 no.3 pp. 258-271
Avena sativa, Brassica napus var. napus, Medicago sativa, Solanum tuberosum, Triticum aestivum, canola, clay loam soils, costs and returns, crop rotation, economic performance, economic sustainability, field experimentation, income, irrigated farming, pests, potatoes, profitability, risk, soil quality, wheat, Manitoba
Crop rotations can be used to optimize economic return by preserving or enhancing soil quality and reducing pest pressure. A field experiment consisting of six rotations of potato with canola (P-C), wheat (P-W), canola-wheat (P-C-W), oat-wheat (P-O-W), wheat-canola-wheat (P-W-C-W), and canola underseeded to alfalfa-alfalfa-alfalfa (P-C(A)-A-A) organized in a Randomized Complete Block Design was established on a clay loam soil in Manitoba, Canada and monitored for fourteen years to assess the relative economic performance of potato in each rotation. A stochastic budget based on returns and risk of returns trade-offs was used to determine each rotation’s profitability. While differences in average annual net income of all crops between rotations were not significant, the P-C-W rotation was the most stable. Despite the economic advantage of P-C in the first two cycles, longer P-C-W or P-C(A)-A-A rotations are recommended, as two-year rotations increase plant disease and decrease economic viability in the long run.