Due to the variability of soil characteristics in field and rising prices high-quality seeds, farmers are increasingly interested applying a system precision variable rate seeding (VRS), which makes it easier manage risks crop production allows ensure profitability farm. Most modern seed drills equipped with hydraulic or electric drive terminal tractor cabin, allowing apply VRS. The aim this st...

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increasing water distribution uniformity in micro irrigation systems has been an important subject in applied researches. despite considerable progress in emitters’ construction, some research reports refer to their incapability in water distribution uniformity. in order to achieve greater uniformity in micro irrigation, it is necessary to manufacture emitters with low variation in manufacturin...

Germination experiments with specific germination mutants of Bacillus subtilis, including a newly isolated mutant affected in pressure-induced germination, suggest that a pressure of 100 MPa triggers the germination cascades that are induced by the nutrient germinant alanine (Ala) and by a mixture of asparagine, glucose, fructose, and potassium ions (AGFK), by activating the receptors for alani...

introduction: non-uniformity test is essentially the only required daily qc procedure in nuclear medicine practice. noise creates statistical variation or random error in a flood image. non-uniformity on the other hand does not have statistical nature and may be regarded as systemic error. the present methods of non-uniformity calculation do not distinguish between these two types of error. the...

Germination timing influences plant fitness, and its sensitivity to temperature may cause it to change as climate shifts. These changes are likely to be complex because temperatures that occur during seed maturation and temperatures that occur post-dispersal interact to define germination timing. We used the model organism Arabidopsis thaliana to determine how flowering time (which defines seed...

Rhododendron species are typical calcifuges that do not grow well in calcareous soils characterized by alkaline pH and high concentrations of Ca2+. In this study, we investigated the effects three levels a Ca2+ treatment on vitro germination seedling growth species: R. chihsinianum, fortunei, vernicosum. Alkaline had no significant effect parameters (gMAX, mean time uniformity) but significantl...

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...