نتایج جستجو برای: irrigation time

تعداد نتایج: 1928429  

ژورنال: علوم آب و خاک 2019

Infiltration is the most important characteristic in the design and management of any surface irrigation system. Since the hydraulic of flow in meandering furrows is different from the standard furrows, the accuracy of infiltration function parameter estimation methods should be examined for the optimal design and management of meandering furrow irrigation. The main objective of this study was ...

A Assareh M Kalhor Y Yousefi fard,

Water deficit is one of the most important difficulties, in which happes in dry zone and half dry zones.Water deficit, as the determinative factor, determinates the growing and extension of the plant cover inthese areas. Using the supper attractive, may reduce the production in the crops and control the plantcover in face of dry stress and water deficit. In this paper, the effect of supper attr...

2016
Md. Zainal Abedin Abu Sayeed Chowdhury Mohammad Shahadat Hossain Karl Andersson Razuan Karim

Wireless Sensor Networks (WSN) have been highly developed which can be used in agriculture to enable optimal irrigation scheduling. Since there is an absence of widely used available methods to support effective agriculture practice in different weather conditions, WSN technology can be used to optimise irrigation in the crop fields. This paper presents architecture of an irrigation system by i...

2016
S. Tayyaba H. Rasheed M. W. Ashraf

Agriculture is one of the leading factor that has momentous impact on the GDP growth of the country. It provides the food and fibers for domestic and international industry. About 65 % of total earnings in Pakistan come from export of cotton, rice, and cotton based goods. The irrigation system of Pakistan is one of the best system in the world but still there is entire needs to improve the conv...

2008
P. Javadi Kia A. Tabatabaee Far M. Omid R. Alimardani L. Naderloo

The idea of irrigation is not new, irrigation stems as far back as the Egyptians and probably further in unrecorded history. Even the idea of automated irrigation is not new, mankind has figured out how to irrigate large areas of foliage through the use of automated and drop irrigation systems. Efficient, automated irrigation systems, which can irrigate plants to a desired level and supply thos...

2010
Vanita Pandey Pankaj K. Pandey

The characterization of temporal and spatial variability of soil moisture is highly relevant for understanding the many hydrological processes, to model the processes better and to apply them to conservation planning. Considerable variability in space and time coupled with inadequate and uneven distribution of irrigation water results in uneven yield in an area Spatial and temporal variability ...

2015
Tianduowa Zhu M. W. Ertsen N. C. van der Giesen

The Hohokam, an irrigation-based society in the American South West, used the river valleys of the Salt and Gila Rivers between 500 and 1500 AD to grow their crops. Such irrigated crops are linking human agency, water sources and the general natural environment. In order to grow crops, water available through rain and river flows needs to be diverted to land where the plants are grown. With a f...

2010
Hongyong Sun Yanjun Shen Qiang Yu Gerald N. Flerchinger Yongqiang Zhang Changming Liu Xiying Zhang

Limited precipitation restricts crop yield in the North China Plain, where high level of production depends largely on irrigation. Establishing the optimal irrigation scheduling according to the crop water requirement (CWR) and precipitation is the key factor to achieve rational water use. Precipitation data collected for about 40 years were employed to analyze the long-term trend, and weather ...

2008
Millie Pant Radha Thangaraj Deepti Rani Ajith Abraham Dinesh Kumar Srivastava

Irrigation management has gained significance due to growing social needs and increasing command for food grains while the available resources have remained limited and scarce. Irrigation management includes optimal allocation of water for irrigation purposes, optimal cropping pattern for a given land area and water availabilities with an objective to maximize economic returns. In the present s...

2017
Marina Carvalho Prado Fernanda Leal Renata Antoun Simão Heloisa Gusman Maíra do Prado

OBJECTIVES This study investigated the cleaning ability of ultrasonically activated irrigation (UAI) and a novel activation system with reciprocating motion (EC, EasyClean, Easy Equipamentos Odontológicos) when used with a relatively new chelating agent (QMix, Dentsply). In addition, the effect of QMix solution when used for a shorter (1 minute) and a longer application time (3 minutes) was inv...

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