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Crop and Tillage Effects on Water Productivity of Dryland Agriculture in Argentina

Author

Listed:
  • Elke Noellemeyer

    () (College of Agriculture, National University of La Pampa, Santa Rosa, L.P., Argentina)

  • Romina Fernández

    () (College of Agriculture, National University of La Pampa, Santa Rosa, L.P., Argentina
    National Institute for Agricultural Technology, Experimental Station "Guillermo Covas", Anguil, L.P., Argentina)

  • Alberto Quiroga

    () (College of Agriculture, National University of La Pampa, Santa Rosa, L.P., Argentina
    National Institute for Agricultural Technology, Experimental Station "Guillermo Covas", Anguil, L.P., Argentina)

Abstract

Rising demands for food and uncertainties about climate change call for a paradigm shift in water management with a stronger focus on rainfed agriculture. The objective here was to estimate water productivity of different crops under no-till (NT) and conventional till (CT), in order to identify rotations that improve the water productivity of dryland agriculture. We hypothesized that NT and cereal crops would have a positive effect on overall water productivity. Crop yield and water use data were obtained from a 15 year experiment (1993 to 2008) on an entic Haplustoll in the semiarid Pampa, Argentina, with a rotation of wheat ( Triticum aestivum L.), corn ( Zea mays L.), sunflower ( Helianthus annus ), and soybean ( Glycine max L. Merr.) . The results indicated an improved water productivity of all crops under NT compared with that of CT; however, the response of cereals (corn +1.0 kg ha −1 mm −1 , wheat +1.3 kg ha −1 mm −1 ) was higher than that of sunflower (+0.3 kg ha −1 mm −1 ) and soybean (+0.5 kg ha −1 mm −1 ). Crop type had a higher impact on water productivity than did tillage system. In agreement with our hypothesis, cereal crops were more efficient (corn 9.8 and wheat 6.9 kg ha −1 mm −1 ) compared with soybean 2.4 and sunflower 3.9 kg mm −1 , but the economic water productivity of sunflower (0.9 US$ ha −1 mm −1 ) almost equaled that of wheat (1.1 US$ ha −1 mm −1 ) and corn (1.2 US$ ha −1 mm −1 ). We concluded that the use of the synergy between NT and water efficient crops could be a promising step towards improving food production in semiarid regions.

Suggested Citation

  • Elke Noellemeyer & Romina Fernández & Alberto Quiroga, 2013. "Crop and Tillage Effects on Water Productivity of Dryland Agriculture in Argentina," Agriculture, MDPI, Open Access Journal, vol. 3(1), pages 1-11, January.
  • Handle: RePEc:gam:jagris:v:3:y:2013:i:1:p:1-11:d:22625
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    More about this item

    Keywords

    water productivity; cereals; oilseeds; trade price; energy contents;

    JEL classification:

    • Q1 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture
    • Q10 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - General
    • Q11 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Aggregate Supply and Demand Analysis; Prices
    • Q12 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Micro Analysis of Farm Firms, Farm Households, and Farm Input Markets
    • Q13 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Markets and Marketing; Cooperatives; Agribusiness
    • Q14 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Finance
    • Q15 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Land Ownership and Tenure; Land Reform; Land Use; Irrigation; Agriculture and Environment
    • Q16 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - R&D; Agricultural Technology; Biofuels; Agricultural Extension Services
    • Q17 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agriculture in International Trade
    • Q18 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Policy; Food Policy

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