Timely harvest is critical to achieve maximum seed viability and vigour in agricultural production. However, little information exists concerning how to reap the best quality seeds of Leymus chinensis, which is the dominant and most promising grass species in the Songnen Grassland of Northern China. The objective of this study was to investigate and evaluate possible quality indices of the seed...

Vegetation crop marks may be formed in areas where vegetation overlays near-surface archaeological remains. These features retain soil moisture with different percentage of moisture compared to the rest of the crops of an area. Depending on the type of feature, crop vigour may be enhanced or reduced by buried archaeological features. Satellite imagery has been already applied successfully in se...

Nano particles may be more useful in comparison to bulk materials because they can pass the cell membrane of crops because of their general size. Nano-silicon or SiO2 is one of the major and frequently used engineered oxide nano particles in deferent fields. Quick germination of cultivated seeds and good seedling establishment are key factors to lentil production under salinity stress soil acro...

Low temperatures at the initial stages of rice development prevent fast germination and seedling establishment and may cause significant productivity losses. In order to develop rice cultivars exhibiting cold tolerance, it is necessary to investigate genetic resources, providing basic knowledge to allow the introduction of genes involved in low temperature germination ability from accessions in...

This study was designed to determine the effect of exogenous spermidine (Spd) (30 μM) on white clover seed germination under water stress induced by polyethylene glycol 6000. Use of seed priming with Spd improved seed germination percentage, germination vigor, germination index, root viability and length, and shortened mean germination time under different water stress conditions. Seedling fres...

Sorghum (Sorghum bicolor L.) originated in the semi-arid tropics and generally is sensitive to low-temperature stress. Chilling stresses include low temperature (below 20 °C) and freezing injury (below 0 °C). In this study seed germination and seedling growth of three sorghum genotypes (KFS1, KFS2 and Speedfeed) were examined under four temperature regimes (35/15, 20/10, 13/10 and 11/8) conditi...

In May, 1999 James Greig Arthur, University Professor at the University of Toronto was awarded the Canada Gold Medal by the National Science and Engineering Research Council. This is a high honour for a Canadian scientist, instituted in 1991 and awarded annually, but not previously to a mathematician, and the choice of Arthur, although certainly a recognition of his great merits, is also a reco...

A pioneer of ageing research, August Weismann has established two rather opposing concepts for aging and even today both gather numerous followers. One is the adaptive concept, according to which ageing has evolved to cleanse the population from old, nonreproductive consumers. The other, non-adaptive concept suggests that ageing is due to greater weight on early survival / reproduction rather t...

were responsible for the transmission of a large number of human and animal diseases. A major proportion of mortality among men and animals is definitely attributable to the attacks of these pests. Besides mortality their direct effect on human life and economy, due to decreased vigour and work is enormous. Moreover, in live animals, they directly inflict a variety of forms of physical damage; ...