in order to study the different levels of irrigation on diversity, density and compound of weed species in corn field, experiment was conducted at agricultural research station, ferdowsi university of mashhad during growing season of 2008-2009. the experiment was with four levels of irrigation (6130, 7290, 8800 and 12330 m3) and four levels of weed control (complete control, broad-leaves contro...

The generation of human-friendly interfaces is an open field aiming at the development of tools that allow non-expert users to take out the maximum profit of the integration of GIS and GPS tools. In this direction, a flexible and open software environment that integrates such technologies with the main objective of supplying a support tool to record field properties in a database is presented. ...

Diquat dibromide is used for desiccation of seed crops and potatoes, and for weed control of non-crop terrestrial and aquatic areas. The absorbed daily dosages for various work tasks were estimated in the exposure assessment document for diquat dibromide and range from 0.03 to 7.8 ug/kg/day. Based on the adjusted Estimated-No-Effect-Level (ENEL) of 33 ug/kg/day for developmental toxicity in rab...