in order to evaluate the impact of time of weed control on yield and yield components of two rapeseed cultivars (zarfam and opra) two separate experiments based on each cultivar conducted at shahryar (karaj). the experiment was carried out based on rcbd with three replications and six treatments for each cultivar. treatments were exerted on the different phenological growth stages including the...

Long-term monitoring is critical to guide conservation strategies and assess the impacts of climatic changes anthropogenic activities. In High Arctic ecosystems, information on distribution population trends plants dramatically lacking. During two field expeditions in 2018 2019, we conducted a systematic floristic survey together with opportunistic collecting polar desert surrounding Alert (Nun...

allelopathy is the main factor of weed interference on growth and development of crops. in order to study of allopathic effect of hoery cress organs extrate on germination and seedling growth of triticale, two separate factorial experiment based on randomized complete block design with four replication were conducted under laboratory and green house conditions. treatment were included of extrac...

the effects of environmental factors on germination and emergence of hoary cress seeds were examined in laboratory and field experiments. germinability of hoary cress under light/dark conditions (90%) was significantly higher than when seeds were incubated under continuous dark (78%). hoary cress could germinate in a broad range of temperatures (15/6, 20/10, 25/15, 30/15, and 35/20?c). the germ...