in order to study the effects of foliar application of si (5/1000 ratio), k (2/1000 ratio) and zn (2/1000 ratio) on rice (cv. tarom hashem), an on-farm experiment carried out based on randomized complete block design with three replications in 2012. some traits such as paddy yield and yield components, neck blast disease and stem borer damage were evaluated. results showed that the effect of fo...

ninety one monoconidial bipolaris isolates were obtained from lesions on different parts of rice in different locations of mazandaran province during the summer of 2009. bipolaris species were identified using morphological features such as color and shape of colony and color and size of conidia and conidiophores. the isolates were separated into two species; 85 (93.4%) isolates belonged to bip...

rice cultivated areas and yield information is indispensable for sustainable management and economic policy making for this strategic food crop. introduction of high spectral and special resolution satellite data has enabled production of such information in a timely and accurate manner. knowledge of the spectral reflectance of various land covers is a prerequisite for their identification and ...

water shortage and its consumption resulted in development of a suitable rice cultivation system which use less water. therefore, this preliminary research was carried out to study the possibility of coversion of irrigated system of rice cultivation to aerobic. we tested 61 aerobic rice genotypes, in which were developed at international rice research institute (irri), together with 3 diverse l...

There are some artificial and natural materials on foundation of heap leaching structures. Geomembrane liner is the most important artificial isolated layer of these structures. The thickness of this layer is about 1 to 2 mm. Foundation overall settlement of such structures changes the primary length of the geomembrane layer. If the strain of geomembrane is more than allowable one, the layer wi...