Water saving and economic impacts of land leveling: the case study of cotton production in Tajikistan
Tóm tắt
Water conservation is essential to prevent salinity and land degradation in Central Asia. Therefore, field-testing and evaluation of water conservation methods, i.e. laser land leveling in new farming systems of Central Asia is important task. This in mind the International Water Management Institute (IWMI) and its regional partner on IWRM FV (IWRM FV project – Integrated Water Resources Management in Ferghana Valley project is funded by Swiss Development Cooperation (SDC) and conducted jointly with IWMI and Scientific Information Center of Interstate Coordination Water Commission (SIC ICWC) in the Ferghana Valley of Central Asia) project SIC ICWC have conducted 3 year study of impacts of the Laser leveled land leveling on water use, productivity and crop yields in northern Tajikistan. The major research question was laser land leveling an effective water saving tool in the new context of land use and ownership on smaller private plots. Can farmers afford the costs of laser land leveling and how economically viable is it? These research questions were studied in 5 ha laser leveled and neighboring non-leveled (control) fields for 2004–2006. The results showed that laser land leveling can reduce the water application rate in 2004 by 593 M3/ha, in 2005 by 1509 M3/ha and in 2006 by 333 M3/ha in comparison with the unleveled field, located in the similar agro-ecological conditions. The deep percolation was 8% lower and run off 24% less than in non-leveled field. The average annual net income from the laser field was 22% higher than that from the control field. The gross margin from the laser-leveled field were 16. 88 and 171% higher compared to that from the control field for 2004, 2005 and 2006, and on average was 92% higher. In spite of these positive results, there are hindrances on wide application of laser land leveling in Tajikistan. These are absence of initial capital of farmers and scattered land location.
Tài liệu tham khảo
Ahmad B, Khokhar SB, Badar H (2001) Economics of laser land leveling in district Faislabad. J Appl Sci 1(3):409–412
Ahmedjanov M (1984) Application and investigation of the laser leveling in the field level. Fan, Tashkent, p 144(in Russian)
Ahmedjanov M, Manabaev ANT, Teshabaev AZ (1988) Application of laser for land leveling. Journal of Mechanized Cotton Production 12:4–6 (in Russian)
Alimi T, Ayanwale AAB (2004) Economic impacts of chemical pesticide use on fadama crop farming in Sudano–Sahelian zone. J Soc Sci 9:149–155 (www.krepublishers.com)
Balabanov SV (1984) The application of the laser equipment for land leveling in the irrigated agriculture. Geodesy and photogram in the ameliorative construction. Novocherkassk. pp 54–68 (in Russian)
Clemmens AJ, Dedrick AR, Pereira LS, De Sousa PL, Pereira LS (1995) Effect of furrow elevation differences on level-basin performance. Am Soc Agric Eng 38(1):153–158
Dalsted NL, Gutierrez PH (2004) Partial budgeting. Available at http://www.ext.colostate.edu/PUBS/farmmgt/03760.html [accessed 02/07]
Droogers P, Kite G (1999) Water productivity from integrated basin modeling. Irrig Drain Syst 13:275–290
Dukhovniy VA, Sokolov VI (2005) Integrated water resources management: experience and lessons Central Asia. GWP CACENA Report. 95pp (in Russian)
Jonish JE (1991) Benefits and costs of laser land leveling in Egypt. In: Bishay A, Dregne H (eds) Desert development Part 1: desert agriculture, ecology and biology: Proceedings of the Second International Desert Development Conference held on 25–31 January 1987 in Cairo, Egypt, vol 4. Harwood, Switzerland, pp 6–9
Khorst MG, Mirzaev NN, Stulina G (2001) Water saving methods. In: Dukhovniy VA (ed) SIC-ICWC. p 114
Kormawa PM, Kamara AY, Jutzi SC, Sanginga N (1999) Economic evaluation of using mulch from multi-purpose trees in Maize based production systems in southwestern Nigeria. Exp Agric 35:101–110 (Cambridge University Press)
Kovda AV (1982) Soils of irrigated Aird Zones of USSR. Academy Sciences, Moscov, p 128 (in Russian)
Mallappa M, Radder GD (1993) Evaluation of different proportion of leveling in Zingg conservation terraces on soil moisture conservation, crop growth and yield of green gram. Mysore J Agric Sci 6(3):241–246
Molden D, Murray Rust H, Sakthivadivel R, Makin I (2003) A water-productivity framework for understating and action. In: Kijne JW, Barker R, Molden D (eds) Water productivity in agriculture: limits and opportunities for improvement. CABI, Wallingford, UK
Mukhamedjanov SSh, Nerozin SA, Galystyan A (2004) Report on water productivity studies of IWRM Ferghana Valley project. SIC ICWC. p 28 (in Russian)
Ren WT, Hu ZF, Cui HG, Yang CT, Liu Y, Wang YJ, Zhang ZY, Li BF (2003) Effect of laser-controlled land leveling and baby rice seedling direct planting on saving water. Trans Chin Soc Agric Eng 19(3):72–75
Rickman J (2002) Land leveling. International Rice Research Institute. p 29
Walker TW, Kingery WL, Street JE, Cox MS, Oldham JL, Gerard PD, Han FX (2003) Rice yield and soil chemical properties as affected by precision land leveling in Alluvial Soils. Agron J 95:1483–1488