Identifying the underlying mechanisms and the sources of variation in plant productivity is critical to the development of accurate predictive models of ecosystem responses to environmental change, including increased nitrogen (N) deposition and altered precipitation patterns. A great deal of variation in aboveground net primary production (ANPP) in tallgrass prairie may be accounted for by var...

Reliability analysis of a power tiller involves studying the probability its performance and functionality over given period. This aims to identify factors that affect reliability determine ways improve performance. The can be evaluated using different methods such as statistical analysis, theory, simulation modelling. These enable assessment tiller's in operating conditions help critical compo...

oroginal article tiller is a handy multi – a purpose tractor is used in agriculture. the noise emitted from tiller may be seriously affected auditory system users. the purpose of this study was to evaluate the exposure to noise in operators of this device. in this study 36cultivator tiller was examined. measurement of sound is based in iso 5131-1996 and iso 7216 standard and was conducted in in...

From 1998 to 2001, the relationship between the proportion of tillers with >0 mummified aphids (Ptm) and the proportion of cereal aphids parasitized (Pp) was estimated on 57 occasions in fields of hard red winter wheat located in central and western Oklahoma. Both original (57 fields) and validation data (34 fields; 2001-2002) revealed weak relationships between Ptm and Pp, however, when Ptm > ...

Salt tolerant variety BR 41 was grown in kharif 2 season by pot experiment to study the effects of salinity and potassium fertilizer on agronomic characteristics rice (Oryza sativa L.). The parameters increased with increasing up 12 dSm-1 level but plant height. increase tiller number, panicle shoot dry matter total grain yield statistically significant at 5% (LSD0.05) level, whereas 1000 weigh...

A suitable planting pattern and irrigation strategy are essential for optimizing winter wheat yield and water use efficiency (WUE). The study aimed to evaluate the impact of planting pattern and irrigation frequency on grain yield and WUE of winter wheat. During the 2013-2014 and 2014-2015 winter wheat growing seasons in the North China Plain, the effects of planting patterns and irrigation fre...

Drought represents a key limiting factor of global crop distribution. Receptor-like kinases play major roles in plant development and defence responses against stresses such as drought. In this study, LRK2, which encodes a leucine-rich receptor-like kinase, was cloned and characterized and found to be localized on the plasma membrane in rice. Promoter-GUS analysis revealed strong expression in ...

Timing of nitrogen (N) fertilizer application can influence grass regrowth, so it is important to identify how tropical grasses respond delays in applying after defoliation. Our objective was the effects timing N harvest on productive, morphogenic and structural characteristics 3 grasses: ‘Xaraés’ (Urochloa brizantha [Hochst. ex A. Rich.] Stapf cv. Xaraés), ‘Marandu’ Marandu) ‘Tanzânia’ (Megath...