Wild oat has two seeds in a spikelet that they have different physiological behavior in regard of  seed germiantion. The upper seed of spikelet is smaller and has deeper dormancy than the lower seed. The range of temperature for germination is  5˚C  to  25 ˚C  and optimal temperature is 15˚C. Both kinds of seeds showed the more  germination rate in low temperatures so that 5 and 10˚C are better...

A distributed seed delivery system is the most important component of a pneumatic central-cylinder seeder. We performed fluent simulation analysis for seed-drop tubes at different parameters and airflow velocities, with an increase in air velocity, larger angle is, easier it to produce vortex, which considerably changes angle, little bend tube improving uniformity seeding performance. The distr...

Poor germination and low seedling growth of stevia are common problems in the cultivation of the plant. Nutri-priming is a newest, safe, easy, and effective method to increase germination characteristics and seedling tolerance against stress. The objective in this study was to assess the effect of nutri-priming with nano potassium (nano-K), paclobutrazol (PBZ), and salicylic acid (SA) on stevia...

in this study, the effects of different concentrations of bulk and nano-sized ag on seed germination and seedling growth of canola were investigated in a randomized completely design with four replications. the experimental treatments included four concentrations of bulk agno 3 (10, 100, 500 and 1000 ppm), four concentrations of nanosized ag (10, 100, 500 and 1000 ppm), and the control without ...

Salt stress is a serious and current global problem for crops. Due to climate change, the soil today has higher salinity levels than in past decades. Identifying temperature, light, that allow plants germinate grow an ambitious challenge future. Hibiscus sabdariffa (H. sabdariffa) plant undergoes abiotic during all stages of growth. The aim this work was identify best conditions terms germinati...

Salicylic acid (SA) inhibited germination of cocklebur (Xanthium pennsylvanicum Wlr), lower seeds, which are completely after-ripened and nondormant. SA also inhibited ethylene production during a pre-germination period of the seeds. Exogenous ethylene overcame the inhibtion of the seed germination by SA. Moreover, SA reduced respiration in pre-germinating whole seeds as well as excised axial...

rapid germination is an important factor determining the final yield. the most important abiotic stress threatening lentils is drought and temperature. therefore, this study was performed with the aim of investigating effects various thermal treatments (5, 10, 15, 20, 25 and 30°c) and four levels of drought (0, -4, -8, -12 and -16 bar) on percentage and germination rate of lentil genotypes. a s...