نتایج جستجو برای: extent of irrigated lands

تعداد نتایج: 21166871  

2007
Johan van Benthem Joel Hamkins Dick de Jongh Eric Pacuit

To my father who taught me that " M9ntıq elmlerin elmidir " and to my mother with the deepest gratitude...

2004
Juan J. Oñate Begoña Peco

Two related land use change dynamics characterise the Guadalent!ın basin (southeast Spain) as one of the most severe cases of desertification in Europe: (1) expansion of highly productive irrigated agriculture in the valley, and (2) intense contemporary changes in the surrounding impoverished dry lands. On the basis of documented information, we trace the effects of past policies on these dynam...

2011
K. F. Wong

THE RICE LANDS of Malaysia, tolaling 0.6 M ha are broadly classified as either granary or nongranary areas. The granaries comprise 8 large and contiguous irrigation schemes, covering 210,000 ha and producing more than 65 percent of the country's total output; and it is in these granaries that further developine.nt of rice production will bt. concentrated. The nongranaries are either rain-fed or...

2010
Carissa Taylor Rimjhim Aggarwal

www.ruaf.org Maricopa County in Arizona, which includes the city of Phoenix and the surrounding suburban areas, is currently the fourth most populous county in the country and among the fastest growing(1). Rapid urbanisation has put a great deal of pressure on agriculture, which has historically been very important in the county. According to the 2007 agricultural census, total farmland decline...

A.R. Sepaskhah, S.H. Ahmadi

Available fresh water resources are subjected to an ever-increasing pressure due to extensive agricultural water demand for irrigated lands. A long-term perspective in shortage of fresh water resources, especially in arid and semi-arid area, highlights an urgent solution for innovative irrigation strategy and agricultural water management. This paper is a review on the wide applications of the ...

2005
T Mkhabela

Vegetable production constitutes an important sub-sector of the agricultural economy of KwaZulu-Natal. Most vegetables are cultivated in mixed-cropping types of farming systems. The technical efficiency of vegetable based cropping systems was estimated in order to identify the potential increase in production without incurring additional costs. The factors affecting technical efficiency and con...

Khadijeh Abolfathi Marzieh Alikhah-Asl Mohammad Namdar Mohammad Rezvani

The growing population and increasing socio-economic necessities creates a pressure on land use/land cover. Nowadays, land use change detection using remote sensing data provides quantitative and timely information for management and evaluation of natural resources. This study investigates the land use changes in part of Hableh Rood Watershed of Iran using Landsat 7 and 8 (Sensor ETM+ and OLI) ...

Journal: Desert 2019
A. Amini H. Ghaiumi Mohammadi K. Karimian

Hydrological status and water table fluctuations are directly related to land use and/or land cover (LULC) changes in each area. In this research, the impact of LULC changes on groundwater quantity and quality of Khan-Mirza Plain, in the northern Karun watersheds, was investigated. For this purpose, Landsat 5, 7 and 8 satellite images and ETM and OLI sensors were employed to prepare the L...

Journal: :Social Science Research Network 2021

This paper studies the impact of climate change on nutritional status very young children between ages 0 – 3 years by using weather data from last half century merged with rich information child, mother and household characteristics in rural coastal Bangladesh. We evaluate health consequences rising temperature relative humidity varying rainfall jointly. Leveraging a saturated fixed-effects mod...

Journal: :Advances in Agronomy 2021

Approximately 1 billion ha of the global land surface is currently salt-affected, representing about 7% earth's surface. Whereas most it results from natural geochemical processes, an estimated 30% irrigated lands globally are salt-affected through secondary human-induced salinization. Application lower quality, alternative irrigation water further threatening expansion areal extent soil salini...

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