trichoderma spp. are known as efficient plant growth promoting agents. hence, enrichment of soil by appropriate population of trichoderma is useful and important for effective plant growth promote. present study aimed to investigate the plant growth promoting effects of five strains of the genus trichoderma species include: trichoderma harzianum tr6, t. harzianum t22, t. asperellum t34, t. atro...

A poly-row branched spike (prbs) barley mutant was obtained from soaking a two-rowed barley inflorescence in a solution of maize genomic DNA. Positional cloning and sequencing demonstrated that the prbs mutant resulted from a 28 kb deletion including the inflorescence architecture gene HvRA2. Sequence annotation revealed that the HvRA2 gene is flanked by two LTR (long terminal repeat) retrotran...

Contrary to most earlier claims in the literature, we demonstrate that crucial aspects of definiteness are overtly marked in classifier languages and follow recently established typological patterns of definiteness marking. Specifically, demonstrative descriptions are used for familiar definites while definite bare nouns are used only in contexts licensed by uniqueness. In classifier languages ...

Land use type is key factor in restoring the degraded soils due to its impact on soil chemical properties and microbial community. In this study, the influences of land use type on arbuscular mycorrhizal fungal (AMF) community and soil chemical properties were assessed in a long-run experimental station in subtropical hilly area of southern China. Soil samples were collected from forest land, o...

Despite their large areas and potential importance as methane sinks, the role of methane-oxidizing bacteria (MOB) in native woodland soils is poorly understood. These environments are increasingly being altered by anthropogenic disturbances, which potentially alter ecosystem service provision. Dryland salinity is one such disturbance and is becoming increasingly prevalent in Australian soils. W...

Remediation of sites contaminated by toxic chlorinated organic compounds by using nanoscale iron particles (NIP) has received great attention owing to their high reactivity resulting from small size and large reactive surface area. However, adequate delivery of NIP into the contaminated zones for in situ remediation applications is difficult because of NIP agglomeration and sedimentation. Diffe...

Several reasons contributed to the low success of early trials, including varieties that were not adapted to the soils, climatic conditions and photoperiod of the region. Most of the trials were carried out in the Delta, where the night temperatures were too low for the varieties used. In additions, the Delta soils were very fertile, while the varieties tested were bred to produce an adequate y...

Soil test method s that measure NH,· .N in silt 100ms before and after incubation under waterlogged condiUons were evalu. ated .. predictors of N availability to 'Nato' rice (Ori_ 8Oti_ L.) frown in the greenhouse. Eighteen soils for each of five previou8 year crop histories were utlllzed. An so'18 were from crop rotations eontaining rice. Coefllelents of determination (rl) for the regression o...

The spatial variability in the concentrations of 1,2,3,4,5,6-hexachlorocyclohexane (HCH) and 1,1,1-trichloro-2,2-bis-(p-chlorophenyl) ethane (DDT) in surface soils was studied on the basis of the analysis of 131 soil samples collected from the surface layer (0-20 cm depth) of the alluvial region of Beijing, China. The concentrations of total HCHs (including alpha-, beta-, gamma-, and delta-isom...