abstract wild lettuce (lactuca serriola) is an annual weed with seed reproduction. an experiment was conducted to evaluate some environmental effects on germination and emergence of this weed. the type of design was completely randomized with four replications in which factors were arranged as factorial. the experiment was carried out with 11 cm petri dishes in a germinator (10 °c) and without ...

the allelopathic effects of various concentrations (0 (as control), 5 %, 10 %, 20 % and 40%) of berseem clover shoot extracts were assayed on germination and radicle growth of four weed species ( amaranthus hybridus, amaranthus albus, solanum nigrum and chenopodium album) as completely randomized factorial with 3 replications. the effect of aqueous extract concentration of berseem clover on the...

the allelopathic potential of different concentrations (0, 5 %, 10 %, 20 % and 40%) of medicago sativa shoot extracts were assayed on germination and radicle growth of four weed species( amaranthus hybridus, amaranthus albus, solanum nigrum and chenopodium album) in a laboratory experiment as completely randomized factorial with 3 replications. the results showed that, final germination percent...

to determine the effect of seed size of sugar beet cultivars on germination and seedling vigor, a study was conducted as a 4×6 factorial experiment based on completely randomized design with 4 replications at seed and plant certification and registration institute, karaj in 2013. the treatments were toucan, dorotea, rasta, sharif, pars, and torbat cultivars and four seed width sizes including 2...

in order to evaluation the effect of drought stress on germination indices and early seedling growth of medicinal herb dill (anethum graveolens l), an experiment was conducted in the agricultural laboratory of urmia payam noor university in 2015 as a randomized complete block design with four replications. treatments were five levels of drought stress (0, -1, -2, -3 and -4 bar induced by polyet...

Pyrethrum is a perennial daisy grown commercially for the insecticide that is extracted from its flowers. In order to evaluate germination and seedling growth of pyrethrum under different temperature and drought stress treatments, an experiment was conducted in seed technology laboratory of Faculty of Agriculture of Islamic Azad University of Isfahan branch in 2018. During this experiment, poly...

in‏ ‏order‏ ‏to‏ ‏study‏ ‏chamomile‏ ‏tolerance‏ ‏to‏ ‏salinity‏ ‏and‏ ‏find‏ ‏a way‏ ‏to‏ ‏increase‏ ‏its‏ ‏tolerance‏ ‏afactorial‏ ‏experiment‏ ‏was‏ ‏conducted‏ ‏in‏ ‏acompletely‏ ‏randomized‏ ‏design‏ ‏with‏ ‏three‏ ‏replications‏ ‏in‏ ‏‎2012.‎‏ ‏seeds‏ ‏primed‏ ‏with‏ ‏salicylic‏ ‏acid‏ ‏and‏ ‏gibberellic‏ ‏acid‏ ‏‎(ga)‎‏ ‏at‏ ‏‎250‎‏ ‏ppm‏ ‏by‏ ‏a‏ ‏combination‏ ‏of‏ ‏the treatments‏ ‏at‏...

Seed germination is a crucial stage in the life history of a species because it represents the pathway from adult to offspring, and it can affect the distribution and abundance of species in communities. In this study, we examined the effects of phylogenetic, life history and environmental factors on seed germination of 134 common species from an alpine/subalpine meadow on the eastern Tibetan P...

Pyrethrum is a perennial daisy grown commercially for the insecticide that is extracted from its flowers. In order to evaluate germination and seedling growth of pyrethrum under different temperature and drought stress treatments, an experiment was conducted in seed technology laboratory of Faculty of Agriculture of Islamic Azad University of Isfahan branch in 2018. During this experiment, poly...

BACKGROUND: Seed aging is an important problem in developing countries which seeds stored in inappropriate condition. OBJECTIVES: Current research was carried out to study the effect of seed aging on quantitative parameters of wheat seeds (Chamran cultivar). METHODS: Experiment was carried out based on randomized complete block desi...