Caspian sea is a land–locked brackish water lake where zoologically characterized by various aquatic animals aquatic animals and different commercially important fish species Shariati [15]. The fishes in the Caspian Sea and its watershed areas include 78 species, and 49 subspecies which belong to 16 fish family. The bulk of Caspian Sea fishes are anadromos and the major commercially important f...

water resources suitability is one of the most important factors to sustainabilityutilization of natural potential by rangeland grazing suitability. to determine this factor inshort time, low cost and high accuracy are most challenges of experts and ranchers. usingsuitable technique for this subject can be sustainable utilization comprising from rangelandecosystems according to its degradation ...

INTRODUCTION: The present article aimed to study field observations of the 2017 Sefid Sang earthquake, Razavi Khorasan Province, Iran, measuring 6 on the Richter scale with the approach of assessing the behaviors and performing a short analysis on the rescue and relief operations. METHODS: This qualitative study has followed the conceptual analysis approach to research. The sample population w...

considering the rich diversity of grape germplasm of iran, the severe cold winter occurred in 2007, provided a chance to evaluate responses of selected superior clones of iranian seedless grape ciltivars to cold in natural and artificial (in freezer) conditions. four one-year old branches per plant in each clone were selected and number of healthy and damaged sprouts were counted. based on cold...

the main purpose of rainfed farming is increasing the water productivity by applying suitable agricultural management including single irrigation (si) and panting time for wheat varieties. in order to study the si optimization and determination its optimal program, a field experiment was conducted as split-split plot based on a randomized complete block design with three replications for differ...

small cabbage white butterfly, pieris rapae (l.) (l.) (lep.: pieridae) and diamondback moth, plutella xylostella (l.) (lep. plutellidae) are two of the most important insect pests of the family brassicaceae. use of resistant varieties is suitable management strategy for control of these pests. in order to study the population fluctuations of p. rapae and p. xylostella, eight cultivars of caulif...

to investigate the effects of sowing date (sd) and single irrigation (si) on grain yield of rainfed wheat varieties, this experiment was conducted as split-split plot arranged in a randomized complete block design (rcbd) with three replications from sep.2000 to sep.2004 at the main station of dryland agricultural research institute (dari) in maragheh. the treatments included three sowing dates ...