Increasing population leads to intensification of water shortage problems in arid regions. Agriculture sector is the main user of water in Iran. Bushehr province with an arid and semiarid climate is located in the south of Iran. Improvement of water productivity (WP), the value or benefit derived from the use of water, is essential in the agriculture sector for achieving food security and susta...

snail transmitted diseases are one of the major group of helminth parasitic diseases which have been established by trematode parasites. the larvae of trematodes (cercariae) use the snails as host. the purpose of the present study was to identify of cercariae released from melanopsis spp. (m. doriae, m. costata, m. praemorsa, and m. nodosa) and evaluate their medical importance. accordingly, 2,...

In Nigeria irrigated agriculture is an important tool for economic growth, food security, and poverty reduction during dry periods of rain-fed agriculture. The concentration and composition of dissolved constituents in water determines its quality for irrigation use. Water quality studies strongly suggest that agriculture is a leading source of water quality problems, due to pesticides and othe...

Proposed Changes to the Format of the IANA IPv6 Registry Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract This document proposes a revised format for the IANA IPv6 address registries. Rather than providing a formal definition of the format, it is described by givi...

The shape and amplitude of the bathymetric lidar waveforms (the recorded time history of the reflected lidar pulses) contain information about the attenuation of the water and the bottom reflectivity in the survey area. This study considers the factors that affect the amplitude of the bottom return and examines the use of the amplitude of the bottom return to distinguishing between different bo...

Coastal aquaculture in Bangladesh consists mainly of two shrimp species (Penaeus monodon and Macrobrachium rosenbergii). Currently, there are about 16,237 marine shrimp (P. monodon) farms covering 148,093 ha and 36,109 fresh water shrimp (M. rosenbergii) farms covering 17,638 ha coastal area. More than 0.7 million people are employed in the farmed shrimp sector and in 2005-2006 the export value...