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Economic Comparison of Conventional and Conservation Management Practices for Irrigated Potato Production in Southern Alberta

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Abstract

Conventional (CONV) potato (Solanum tuberosum L.) production in Alberta has relied on high levels of soil disturbance which may result in long-term degradation of soil resources. A 12-yr (2000–2011) study was conducted to address issues with the CONV system and to evaluate the effects of conservation (CONS) practices on the economics of irrigated potato production. Potato was grown in 3- to 6-yr rotations which included dry bean (Phaseolus vulgaris L.), sugar beet (Beta vulgaris L.), soft wheat (Triticum aestivum L.), oat (Avena sativa L.), and timothy (Phleum pratense L.). CONS included reduced tillage, cover crops, compost addition, and solid-seeded bean. Averaged over 12-yr, potato yields for 4-yr CONV rotations (potato–wheat–beet–bean) were lower than those for CONS systems. However, the decreased costs associated with not using compost in 4-yr CONV offset the losses in yield, thereby resulting in an overall net income higher than that of CONS systems.

Resumen

La producción convencional de papa (CONV, Solanum tuberosum L.) en Alberta se ha respaldado en altos niveles de alteraciones del suelo, que pudieran resultar en su degradación a largo plazo. Se condujo un estudio de 12 años (2000–2011) para enfatizar temas con el sistema CONV y para evaluar los efectos de prácticas de conservación (CONS) en aspectos económicos de la producción de papa de riego. Se cultivó la papa en rotaciones de 3 a 6 años, que incluían frijol (Phaseolus vulgaris L.), remolacha (Beta vulgarins L.), trigo suave (Triticum aestivum L.), avena (Avena sativa L.) y el pasto bohordillo o hierba timotea (Phleum pratense L.). CONS incluyó labranza mínima, cultivos de cobertura, agregado de composta y frijol en alta densidad. Promediando sobre 12 años, los rendimientos de la papa en rotaciones CONV por 4 años (papa, trigo, remolacha, frijol) fueron más bajos que los de los sistemas CONS. No obstante, la disminución de costos asociada con no usar composta en 4 años de CONV compensa la pérdida en rendimiento, resultando entonces en un ingreso neto total más alto que el de los sistemas CONS.

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Acknowledgments

We thank Nathan Barry, Jim Sukeroff, Dale Reynolds, staff and summer students at the AAFC Vauxhall Sub-station and Brandon Research and Development Centre for field and technical assistance. Ron Gregus assisted with potato management. Jenifer Nitschelem (2000–2006) and Peter Regiting (2007–2011), Rogers Sugar Ltd./Lantic Inc. (Taber, AB) managed sugar beet husbandry. Funding contributions from the Alberta Agricultural Research Institute, the Potato Growers of Alberta, Alberta Pulse Growers; Lantic Inc., Agriculture and Agri-Food Canada, and the Pulse Science Cluster are greatly appreciated.

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Correspondence to Mohammad Khakbazan.

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Khakbazan, M., Larney, F.J., Huang, J. et al. Economic Comparison of Conventional and Conservation Management Practices for Irrigated Potato Production in Southern Alberta. Am. J. Potato Res. 93, 448–462 (2016). https://doi.org/10.1007/s12230-016-9522-8

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