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Biological and mechanical subsoiling in potato production – a participatory research approach

Guamán Sarango, Victor (2015). Biological and mechanical subsoiling in potato production – a participatory research approach. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2015:135
ISBN 978-91-576-8468-4
eISBN 978-91-576-8469-1
[Doctoral thesis]

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Soil compaction in agricultural fields has increased due to the use of heavy agricultural machinery and intensified vehicular traffic. Compaction reduces total porosity, permeability and water-holding capacity in soil, leading to poorer aeration and impeded root development and nutrient uptake. Soil compaction occurs in topsoil and subsoil, but subsoil compaction is considered more persistent, complex and costly to alleviate. Mechanical methods such as deep tillage and biological methods such as use of deep-rooting crops are available to deal with soil compaction, but combining these methods might tackle compaction more efficiently. This thesis investigates the effects of mechanical inter-row subsoiling, biological subsoiling and a combination of these on soil penetration resistance, potato root length density, nutrient uptake, tuber yield and quality. Part of the study involved interdisciplinary methodology and participatory research, in which farmers, advisors and researchers formed a collaborative research group to develop effective methods to reverse soil compaction and improve potato production. To test hypotheses field experiments at an experimental farm and on seven collaborating farms in southern Sweden (Skåne, Blekinge and Östergötland) following the principle for the so called mother and baby (farm) trial design were performed. Inter-row subsoiling alone and in combination with preceding crops greatly improved soil penetration resistance. Root length density (RDL) was higher in the combined treatment than in the separate inter-row and biological subsoiling treatments. Nitrogen uptake increased with inter-row subsoiling which in starch potato trials could be shown as an increase in total tuber yield. A positive effect of autumn-sown oilseed radish as preceding crop treatment was shown in farm trials. The incidence of external and internal quality defects was low in all treatments.

The results from the field trials led to many interesting debates with participating farmers with specific knowledge of their own farm conditions and to a new, deeper understanding of the potato cropping system and potential improvements. Over time, the unique combination of a collaborative research group in connection with regional participatory learning and development groups became a combined boundary organisation. Such structures can close the gap between science and practical farming and contribute to innovation and capacity building among farmers and all stakeholders, and thus need to be created and maintained.

Authors/Creators:Guamán Sarango, Victor
Title:Biological and mechanical subsoiling in potato production – a participatory research approach
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2015
Depositing date:22 December 2015
Number of Pages:64
IEkelöf J, Guamán V, Jensen ES, Persson P (2014) Inter-row subsoiling and irrigation increase starch potato yield, phosphorus use efficiency and quality parameters. Potato Research 58:15-27
IIGuamán V, Båth B, Hagman J, Gunnarsson A, Persson P. Soil penetration resistance, root growth, nitrogen uptake and yield in potato production using biological and inter-row subsoiling on a loamy sand (Accepted for publication)
IIIGuamán V, Gunnarsson A, Båth B, Hagman J, Persson P. Assessing effects on potato yield and quality of biological and inter-row subsoiling in field experiments - participatory collaboration (Manuscript)
IVLjung M, Helmfrid H, Guamán V, Gunnarsson A, Persson P. The potential of boundary organizations as platforms for experiential learning, participatory development and responsible scaling out in agriculture (Manuscript)
Place of Publication:Uppsala
Publisher:Department of Crop Production Ecology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-8468-4
ISBN for electronic version:978-91-576-8469-1
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F07 Soil cultivation
P Natural resources > P33 Soil chemistry and physics
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
(A) Swedish standard research categories 2011 > 5 Social Sciences > 509 Other Social Sciences > Social Sciences Interdisciplinary (Peace and Conflict Research and Studies on Sustainable Society)
Agrovoc terms:arable soils, subsoiling, soil structure, tillage equipment, soil chemicophysical properties, solanum tuberosum, raphanus sativus, crop rotation, crop yield, roots, plant production, participatory approaches, field experimentation, sweden
Keywords:preceding crops, subsoiling, soil penetration resistance, radish, tuber yield and quality, RLD, boundary organisation, collaborative research
Permanent URL:
ID Code:12927
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Crop Production Ecology
External funders:Stiftelsen Lantbruksforskning
Deposited By: M Sc Victor Guamán Sarango
Deposited On:29 Dec 2015 09:59
Metadata Last Modified:10 Sep 2020 13:41

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