abstract in order to study the effects of different irrigation management on water productivity of local, improved and hybrid rice varieties an experiment was carried out on a split plot design with 3 replications. the varieties were splited on 5 irrigation methods (i.e. full irrigation, awd, 5, 8 and 11 day irrigation interval) at rice research institute of iran, rasht during cropping season o...

BACKGROUND Activities such as swimming, paddling, motor-boating, and fishing are relatively common on US surface waters. Water recreators have a higher rate of acute gastrointestinal illness, along with other illnesses including respiratory, ear, eye, and skin symptoms, compared to non-water recreators. The quantity and costs of such illnesses are unknown on a national scale. METHODS Recreati...

The purpose of this paper is to estimate changes in productivity, technical efficiency and technology across the economic sectors during the period 1985-2006. We also seek to identify the turning points for productivity growth to see whether it was accompanied by technological change and/or technical efficiency. For estimating economic growth, aggregate production function is used. We find that...

The eastern Mediterranean faces a severe water crisis: water supply decreases due to climate change, while demand increases due to rapid population growth. The GLOWA Jordan River project generates science-based management strategies for maximizing water productivity under global climate change. We use a novel definition of water productivity as the full range of services provided by landscapes ...

The objective of the study examines the impact of industrialization and financial development on water resources, in the specific context of Pakistan. Data set from 19752009 are taken for time series analysis. The result reveals that economic growth positively linked with the water resource, as water plays a pivotal role in the economic development of a country. Thus limiting this resource woul...

Abstract. The article focuses on economic productivity and have stressed the theory of marginal utility (productivity). In modern researches such aggregate indicators as a total factor multifactor prevail. Total Factor Productivity is measured by combining effects all there sources used in production goods services (labour, capital, materials, energy, etc.) dividing it into output. Multifactor ...

Surface water quality deterioration is a serious problem in many rapidly urbanizing catchments in developing countries. There is currently a lack of studies that quantify water quality variation (deterioration or otherwise) due to both socio-economic and infrastructure development in a catchment. This paper investigates the causes of water quality changes over the rapid urbanization period of 1...

Recently, the economic feasibility of drilling a horizontal well improved drastically due to advances in drilling technology. Advantages of horizontal wells over vertical well applications have been confirmed by many scientists(1-4) and operators(5-7). Horizontal wells showed many distinct advantages over vertical ones such as improvement of well productivity, attenuation of sand production, an...