نتایج جستجو برای: irrigation management

تعداد نتایج: 888418  

2015
Francesco Vuolo Laura Essl Clement Atzberger

This paper presents the results of a collaborative work with farmers and a cost-benefit analysis of geospatial technologies applied to irrigation water management in a semi-arid agricultural area in Lower Austria. We use Earth observation (EO) data to estimate crop evapotranspiration (ET) and webGIS technologies to deliver maps and irrigation advice to farmers. The study reports the technical a...

1998
E. Timothy Oppelt

Sprinkler irrigation is a common farming practice in those states where the semi-arid climate and lack of sufficient rainfall during critical growing periods necessitate the use of supplemental water. The source of most irrigation water is groundwater which can be contaminated with volatile organic compounds (VOCs). Since the groundwater may be the primary or only source of drinking water for a...

2014
Muhammad Irfan Ashraf Muhammad Aslam Pervez Muhammad Amjad Rashid Ahmad Muhammad Ayub

The goal of this study was to observe the impact of agro-management practices like, irrigation and nutrition on two pea (Pisum sativum) cultivars named Climax and Meteor at Horticultural Research Area, U.A.F. Growth parameters like Main stem Length (cm), number of leaves per plant, leaf Area (cm), number of pods per plant, length of pod (cm) number of seeds per pod and reproductive attributes l...

Journal: :Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland 2012
D S Y Chan A Saklani P R Shah M Lewis P N Haray

AIM The efficacy of rectal irrigation (RI) was assessed in patients with various functional bowel disorders. METHOD A prospective analysis was carried out of patients presenting to our functional bowel clinic from 2005 to 2009. The Cleveland Clinic Constipation and Incontinence Scores were used to assess outcomes following rectal irrigation. Patients were asked if they were satisfied with RI ...

Journal: :The American journal of tropical medicine and hygiene 2005
Jennifer Keiser Marcia Caldas De Castro Michael F Maltese Robert Bos Marcel Tanner Burton H Singer Jürg Utzinger

Human-made ecologic transformations have occurred at an unprecedented rate over the past 50 years. Prominent among them are water resource development projects. An estimated 40,000 large dams and 800,000 small dams have been built, and 272 million hectares of land are currently under irrigation worldwide. The establishment and operation of water projects has had a history of facilitating a chan...

2018
Dunsfort N Malejane Peter Tinyani Puffy Soundy Yasmina Sultanbawa Dharini Sivakumar

This study investigated the effect of deficit irrigation at three management allowable depletion levels (MAD) 25%, 50%, and 75% on phytochemicals, ascorbic acid, antioxidant activity, glucose, fructose, and fresh and dry mass in two green leafy lettuce cultivars (Lollo Bionda and Vera) at harvest. Genotype response was observed during deficit irrigation on fresh and dry mass at harvest. Vera re...

2015
Ioannis Gravalos Dimitrios Kateris Anastasios Georgiadis Theodoros Gialamas Avgoustinos Avgoustis

This research is a study on the relationship of irrigation water treatments and soil moisture distribution uniformity (DU). Soil moisture distribution was based on long-term data sets that were collected during wet and dry soil conditions (from permanent wilting point to field capacity) using a novel electromagnetic sensor-based platform moving inside subsurface horizontal access-tubes. The irr...

2003
F OLIVIER

To meet the challenge of a limited and costly water supply, South African sugarcane growers will have to find ways of increasing the efficiency of irrigation to maintain high cane and sucrose yields. The term ‘water use efficiency’ (WUE) is generally used as a measure of the overall effectiveness of water (either rainfall or irrigation, or both) for crop production. WUE can be defined as cane y...

Journal: :Journal of environmental management 2013
Irene Blanco-Gutiérrez Consuelo Varela-Ortega David R Purkey

Sustaining irrigated agriculture to meet food production needs while maintaining aquatic ecosystems is at the heart of many policy debates in various parts of the world, especially in arid and semi-arid areas. Researchers and practitioners are increasingly calling for integrated approaches, and policy-makers are progressively supporting the inclusion of ecological and social aspects in water ma...

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