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Effect of tillage and application of gypsum In a No-Till field under supplementary irrigation with sodium bicarbonate waters

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  • Costa, José Luis
  • Aparicio, Virginia Carolina
  • Sallesses, Leonardo Fabian
  • Frolla, Franco Daniel

Abstract

Supplementary irrigation is widespread in the Humid Pampa of Argentine, where the main source of water for irrigation has elevated content of sodium bicarbonate. The combination of irrigation and rain increases the sodium absorption ratio of soil (SARs), consequently raising the clay dispersion and reducing infiltration. The water quality standards for irrigation indicate that SARs values ​​should remain below 3.5. An alternative to mitigate these disadvantages is the application of a gypsum amendment. This study targeted the following objectives: measure the impact of tillage and the addition of gypsum on: infiltration, bulk density, sodium content and crop yield in a soil (Argiudoll and petrocalcic Paleudoll association) under no-till with supplementary irrigation. One treatment consisted of applying a gypsum liming of particle size less than 3mm. After application, the plots were tilled to a depth of 15cm. Sunflower (Helianthus annuus L.) was seeded 30days after the completion of the amendment. Applying gypsum improved water infiltration into the soil. Tillage treatment without adding gypsum reduced SARs and increased infiltration the same way as tillage and gypsum treatment. This can be attributed the dissolution of native or precipitated carbonate by irrigation water. Tilled treatments, with or without amendment, had higher yield compared to no-till treatment.

Suggested Citation

  • Costa, José Luis & Aparicio, Virginia Carolina & Sallesses, Leonardo Fabian & Frolla, Franco Daniel, 2016. "Effect of tillage and application of gypsum In a No-Till field under supplementary irrigation with sodium bicarbonate waters," Agricultural Water Management, Elsevier, vol. 177(C), pages 291-297.
    • Handle: RePEc:eee:agiwat:v:177:y:2016:i:c:p:291-297
    DOI: 10.1016/j.agwat.2016.08.005
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    References listed on IDEAS

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    1. Costa, José Luis & Aparicio, Virginia Carolina, 2015. "Quality assessment of irrigation water under a combination of rain and irrigation," Agricultural Water Management, Elsevier, vol. 159(C), pages 299-306.
    2. Aparicio, V. & Costa, J.L. & Zamora, M., 2008. "Nitrate leaching assessment in a long-term experiment under supplementary irrigation in humid Argentina," Agricultural Water Management, Elsevier, vol. 95(12), pages 1361-1372, December.
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