Water productivity in agriculture limits and opportunities for improvement pdf

To obtain insights into crop performance, water use, and. Agricultural water productivity, irrigation efficiency, singlefactor. Gaining more yield and value from less water can reduce future demand for water, limiting environmental degradation and easing competition for water. Issues, concepts and approaches as production resources become scarce, producers seek ways to enhance the productivity of the resources and of the entire production system. Impact of quality and reliability of irrigation on field and. Methods and technologies to improve efficiency of water use. Irrigated aerobic rice is a new system being developed for lowland areas with water shortage and for favorable upland areas with access to supplementary irrigation. The issue of water management and interventions for its improvement runs across sectors. Challenges are the water related legislations, inadequate financial support and the lack of national coordination. Strengthening agricultural water efficiency and productivity.

Trees are important landscape elements that help regulate water. The united nations world water assessment programme calls for crop water productivity increases with the aim of reducing pressure to develop new supply sources or increasing water allocation to agriculture unesco, 2009. Increasing water productivity in agriculture 107 trees outside forests, or trees on farms, are an important component of manmade landscapes. Water productivity in agriculture limits and opportunities for improvement. Irrigation water productivity is more influenced by agronomic.

Comprehensive assessment of water management in agriculture series 1. Irrigation water productivity is more influenced by. A 35% increase in water productivity could reduce additional crop water consumption from 80% to 20%. In recent decades the irrigation efficiency concept has gradually been replaced, both in the literature and in practice, with the introduction of crop water use efficiency wue and later on with agricultural water productivity wp. Molden 103 in regions experiencing an absolute or economic shortage of water, there is an urgent need to increase the water productivity wp of crops through breeding or naturalresources management. Singh 2, madar samad 3, hugh turral 4 and chaitali purohit 5 abstract the objective of the study is to explore the scope for water productivity enhancement in irrigated agriculture. Acknowledgments status, conditions, and trends this report, the result of extensive collaboration within the u.

Molden 145 abstract considering the persistently growing pressure on. For example, in figure 1 the line ab defines the limits of technical efficiency. To a large extent, lwp depends on the water productivity of the plants that make up animal feeds. While major investments are required to achieve irrigation efficiency improvements. With 10% tree cover on nearly half of the worlds agricultural land, agroforestry is a common reality zomer et al. A waterproductivity framework for understanding and action. It demonstrates how efficiency of water use can be enhanced to maximize yields. This paper focuses on the underlying processes and future opportunities of wp gains in water scarcity prone and poverty stricken savannah regions of the world. There are only a few basic methods of using the earths water. Simply put, good agricultural water management means using water in a way that provides crops and animals the amount of water they need, enhances productivity, and conserves natural resources for the benefit of downstream users and ecosystem services. It entails the cultivation of nutrientresponsive cultivars in nonsaturated soil with sufficient external inputs to reach yields of 7080% of highinput flooded rice. Limits and opportunities for improvement, comprehensive assessment of water management 2002. Water productivity in agriculture cambridge university press.

Water resource management productivity irrigated farming crop production rice. Physical water productivity is defined as the ratio of agricultural output to the amount of water consumed more crop per drop, and economic water productivity is defined as the value derived per unit of water used and this has also been used to relate water use in agriculture to nutrition, jobs, welfare and the environment. Highlights we present challenges and opportunities to the upscaling of rainwater harvesting rwh in south africa. See general information about how to correct material in repec for technical questions regarding this item, or to correct its authors, title, abstract. Understanding the production function is a precondition for identifying opportunities for improving the performance of a pr oduction system. The assessment outlined in this report forms part of the strengthening agricultural water e. Using realtime satellite data to track water productivity in. Apr 20, 2017 using realtime satellite data to track water productivity in agriculture new fao tool offers water scarce countries and river basins a way to boost productivity 20 april 2017, rome measuring how efficiently water is used in agriculture, particularly in water scarce countries, is going hightech with the help of a new tool developed by fao. Limits and opportunities for improvement comprehensive assessment of water management in agriculture series, 1. Opportunities to increase water productivity in agriculture with special reference to africa and south asia a report prepared by stockholm environment institute, for the swedish ministry of environment presentation at csd 16, new york 14 may 2009 jacob kijne1,2, jennie barron2,3, holger hoff2,4, johan rockstrom2,3.

All material on this site has been provided by the respective publishers and authors. A waterproductivity framework for understanding and action d molden, h murrayrust, r sakthivadivel, i makin water productivity in agriculture. Chapter 8 increasing water productivity in agriculture. Water productivity in agriculture limits and opportunities for improvement edited by jacob w. This study analyzed contributions of agronomic practice and. Jul 29, 2008 as a society, we must identify measures through which agricultural users can economically adopt advanced irrigation schemes and implement practices to improve irrigation efficiency and water productivity in sustainable agriculture while remaining sensitive to societal needs.

Higher crop and pasture water productivity will result in higher lwp if the feeds derived from the crops and pasture plants are palatable, have high nutrient value and metabolizable energy and are available to animals. Water productivity is defined as the amount of agricultural output per unit of water depleted and can be applied to crops, trees livestock and fish. Increasing water productivity in agriculture worldfish. This is an advance edition of the agricultural water productivity. Opportunities lie in the government buy in and the knowledge gathered during over 15 years of rwh research. Kijne, randolph barker and david molden international water management institute, colombo, sri lanka cabi publishing in association with the international water management institute.

In general, improving agricultural water productivity, thus freeing up water for. In spite of the need for increasing, and the opportunities to. Improving water productivity in agriculture citeseerx. Increasing water productivity in agriculture 105 background as water resources around the world are threatened by scarcity, degradation and overuse, and food demands are projected to increase, it is important to improve our ability to produce food with less water. Opportunities to increase water productivity in agriculture. Increasing water productivity in agriculture iwmi cgiar. When requesting a correction, please mention this items handle. Limits and opportunities for improvement edited by kijne et al. Water use efficiency and water productivity ragab ragab wp3 w4c this note is based on a number of discussions that took place in bari and bangalore and as the w4c project carries in its title the term water use efficiency and wp3 is dedicated to water use efficiency, it is timely that we have a clear idea about the meaning of this term. Jan 25, 2007 without water productivity wp gains, the additional freshwater in agriculture will amount to 5,600 km3 year. Quantifying the influence of driving factors on irrigation water productivity iwp is vital for efficient agricultural water use. This is three times the current global irrigation use. Agricultural water management united states agency for.