Is Ridge Cultivation Sustainable? A Case Study from the Haean Catchment, South Korea

Non-sustainable agricultural practices can alter the quality of soil and water. A sustainable soil management requires detailed understanding of how tillage affects soil quality, erosion, and leaching processes. Agricultural soils in the Haean catchment (South Korea) are susceptible to erosion by water during the monsoon. For years, erosion-induced losses have been compensated by spreading allochthonous sandy material on the fields. These anthropogenically modified soils are used for vegetable production, and crops are cultivated in ridges using plastic mulches. To evaluate whether the current practice of ridge cultivation is sustainable with regard to soil quality and soil and water conservation, we (i) analysed soil properties of topsoils and (ii) carried out dye tracer experiments. Our results show that the sandy topsoils have a very low soil organic matter content and a poor structure and lack soil burrowers. The artificial layering induced by spreading sandy material supported lateral downhill water flow. Ridge tillage and plastic mulching strongly increased surface runoff and soil erosion. We conclude that for this region a comprehensive management plan, which aims at long-term sustainable agriculture by protecting topsoils, increasing soil organic matter, and minimizing runoff and soil erosion, is mandatory for the future.

[1]  Hannes Flühler,et al.  Tracer Characteristics of Brilliant Blue FCF , 1995 .

[2]  D. W. Reeves,et al.  USING WINTER COVER CROPS TO IMPROVE SOIL AND WATER QUALITY , 2001 .

[3]  M. V. Genuchten,et al.  Review and comparison of models for describing non-equilibrium and preferential flow and transport in the vadose zone , 2003 .

[4]  William James Lament.  Plastic Mulches for the Production of Vegetable Crops , 1993 .

[5]  R. Lal.  Laws of sustainable soil management , 2011, Agronomy for Sustainable Development.

[6]  J. Spiertz,et al.  Nitrogen, sustainable agriculture and food security. A review , 2011, Agronomy for Sustainable Development.

[7]  B. Huwe,et al.  Microtopography, water storage and flow patterns in a fine‐textured soil under agricultural use , 2013 .

[8]  B. Kim,et al.  Eutrophication of reservoirs in South Korea , 2001, Limnology.

[9]  S. Polasky,et al.  Measures of the effects of agricultural practices on ecosystem services , 2007 .

[10]  Jianhang Lu,et al.  Visualizing bromide and iodide water tracer in soil profiles by spray methods. , 2003, Journal of environmental quality.

[11]  Felix Naef,et al.  An experimental tracer study of the role of macropores in infiltration in grassland soils , 2003 .

[12]  Soon-Jin Hwang,et al.  Water quality and limnology of Korean reservoirs , 2003, Paddy and Water Environment.

[13]  R. Lal,et al.  Soils and sustainable agriculture. A review , 2011, Agronomy for Sustainable Development.

[14]  Aaas News,et al.  Book Reviews , 1893, Buffalo Medical and Surgical Journal.

[15]  R Core Team,et al.  R: A language and environment for statistical computing. , 2014 .

[16]  D. Robinson,et al.  Soil Erosion and Conservation , 1988 .

[17]  Christina Bogner,et al.  Investigating flow mechanisms in a forest soil by mixed‐effects modelling , 2010 .

[18]  S. Frei,et al.  The effect of fertilizer best management practices on nitrate leaching in a plastic mulched ridge cultivation system , 2013 .

[19]  C. B. Tanner,et al.  Non‐Uniform Infiltration Under Potato Canopies Caused by Interception, Stemflow, and Hilling1 , 1976 .

[20]  N. Jarvis.  A review of non‐equilibrium water flow and solute transport in soil macropores: principles, controlling factors and consequences for water quality , 2007 .

[21]  Baltasar Trancón y Widemann,et al.  Image analysis for soil dye tracer infiltration studies , 2012, 2012 3rd International Conference on Image Processing Theory, Tools and Applications (IPTA).

[22]  C. E. SHANNON,et al.  A mathematical theory of communication , 1948, MOCO.

[23]  Arthur Wallace,et al.  High‐precision agriculture is an excellent tool for conservation of natural resources , 1994 .

[24]  H. Jensen,et al.  Depth distribution of preferential flow patterns in a sandy loam soil as affected by tillage , 1997 .

[25]  C. Barrow.  Biochar: Potential for countering land degradation and for improving agriculture , 2012 .

[26]  S. Robinson,et al.  Food Security: The Challenge of Feeding 9 Billion People , 2010, Science.

[27]  W. Rawls,et al.  Impact of roots on ground water quality , 2004, Plant and Soil.

[28]  J. Boesten,et al.  Pesticide Leaching from Agricultural Fields with Ridges and Furrows , 2010, Water, air, and soil pollution.

[29]  Sewoong Chung,et al.  Water quality of runoff from agricultural-forestry watersheds in the Geum River Basin, Korea , 2007, Environmental monitoring and assessment.

[30]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[31]  S. Polasky,et al.  Agricultural sustainability and intensive production practices , 2002, Nature.

[32]  Gunnar Nützmann,et al.  Controls of land use and soil structure on water movement: lessons for pollutant transfer through the unsaturated zone. , 2009 .

[33]  Brian G. Wolff,et al.  Forecasting Agriculturally Driven Global Environmental Change , 2001, Science.

[34]  Markus Ulrich,et al.  Machine Vision Algorithms and Applications , 2007 .

[35]  Yong Sik Ok,et al.  Fate of fertilizer 15N in intensive ridge cultivation with plastic mulching under a monsoon climate , 2012, Nutrient Cycling in Agroecosystems.

[36]  Bernd Huwe,et al.  Simulation of Runoff Patterns and Soil Erosion on Mountainous Farmland with and without Plastic-Covered Ridge-Furrow Cultivation in South Korea , 2013 .

[37]  S. Arnhold,et al.  Modeling water flow in a plastic mulched ridge cultivation system on hillslopes affected by South Korean summer monsoon , 2013 .

[38]  S. Hansen,et al.  Preferential flow in sandy loam soils as affected by irrigation intensity , 1997 .

[39]  Hideaki Shibata,et al.  Potential effects of climate change and variability on watershed biogeochemical processes and water quality in Northeast Asia. , 2010, Environment international.