نتایج جستجو برای: irrigated rice

تعداد نتایج: 79982  

2014
Leila Lucia Fritz Elvis Arden Heinrichs Vilmar Machado Tiago Finger Andreis Marciele Pandolfo Silvia Martins Lidia Mariana Fiuza Silvia Martins de Salles Jaime Vargas de Oliveira

The present study aimed to determine the selectivity of the pyrethroid lambdacyhalothrin on arthropod natural enemy populations in irrigated rice fields in Rio Grande do Sul, Brazil. The study was conducted at three sites: districts of Cachoeira do Sul, Eldorado do Sul and Capivari do Sul during the crop years of 2007/2008 and 2008/ 2009. Each site consisted of two subareas divided into four pl...

Journal: :Acta tropica 2004
C M Mutero C Kabutha V Kimani L Kabuage G Gitau J Ssennyonga J Githure L Muthami A Kaida L Musyoka E Kiarie M Oganda

An ecosystem approach was applied to study the links between malaria and agriculture in Mwea Division, Kenya. The study was organized into five phases. Phase I had two components including a stakeholder workshop conducted with community representatives and other key stakeholders, and the collation of data on common diseases from outpatient service records at the local hospital. Phase I aimed at...

2013
Takuji W. Tsusaka Kei Kajisa Valerien O. Pede Keitaro Aoyagi

Behavioral game experiments, spatial econometrics, and household survey are blended in a single study to investigate how the experience of collective irrigation management facilitates the spillover of social behaviors among neighbors. Dictator game and public goods game experiments are conducted to quantitatively elicit altruistic behavior and contributory behavior, respectively, of rice farmer...

Journal: :Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association 2010
Anita Singh Rajesh Kumar Sharma Madhoolika Agrawal Fiona M Marshall

The present study was conducted to assess the risk to human health by heavy metals (Cd, Cu, Pb, Zn, Ni and Cr) through the intake of locally grown vegetables, cereal crops and milk from wastewater irrigated site. Milk is not directly contaminated due to wastewater irrigation, but is an important route of food chain transfer of heavy metals from grass to animals. Heavy metal concentrations were ...

Journal: :Journal of the American Mosquito Control Association 2002
Jennifer Keiser Jürg Utzinger Burton H Singer

Rice production in sub-Saharan Africa has more than doubled in the last 3 decades and the potential to further develop rice-harvested areas is considerable. Several studies have demonstrated that the transformation of arable land into rice irrigation might create suitable habitats for large populations of disease vectors. Prominent among those are anopheline mosquitoes responsible for transmiss...

Journal: :Chemosphere 2011
M Azizur Rahman M Mamunur Rahman K Kadohashi T Maki H Hasegawa

This study was conducted to investigate the effect of external iron status and arsenic species on chelant-enhanced iron bioavailability and arsenic uptake. Rice seedlings (Oryza sativa L.) were used as model plant, and were grown in artificially contaminated sandy soils irrigated with Murashige and Skoog (MS) culture solution. Arsenate uptake in roots and shoots of rice seedlings were affected ...

2016
Sokvibol Kea Hua Li

The aims of this study are to measure the technical efficiency (TE) of Cambodian household’s rice production and trying to determine its main influencing factors using the stochastic frontier production function. The study utilized primary data collected from 301 rice farmers in three selected districts of Battambang by structured questionnaires. The empirical results indicated the level of hou...

Journal: :Plant physiology 2002
Mohammed Joinal Abedin Jörg Feldmann Andy A Meharg

Arsenic (As) finds its way into soils used for rice (Oryza sativa) cultivation through polluted irrigation water, and through historic contamination with As-based pesticides. As is known to be present as a number of chemical species in such soils, so we wished to investigate how these species were accumulated by rice. As species found in soil solution from a greenhouse experiment where rice was...

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