Dynamics of an Anisotropic Universe in f(R,T)f(R,T) Theory

Dynamics of an anisotropic universe is studied in $f(R,T)$ gravity using a rescaled functional $f(R,T)$. Three models have been constructed assuming a power law expansion of the universe. Physical features of the models are discussed. The model parameters are constrained from a dimensional analysis. It is found from the work that, the $BVI_h$ model in the modified gravity can favour quintessence and phantom phase.Comment: 16 pages, 4 figure

Popularization of organic chilli cultivation in the Eastern Ghat high land zone of Odisha, India

The present study was conducted in the Koraput district of Odisha in India during 2012-13 and 2013-14 under National Horticulture Mission for popularization of organic chilli cultivation through frontline demonstrations.The green chilli yield of hybrid Guntur Hope varied from 5.0 t/ha to 6.67 t/ha in different FLD organic plots, where as it varied from 5.75 t/ha to 6.83t/ha in inorganic plots (Farmers Practice). The average yield in organic plots was 6.29 t/ha in comparison with average yield 6.52 t/ha of inorganic plots in farmers practice. The average cost of cultivation per ha of chilli on FLD plots was Rs.46, 100/- as against Rs. 43,400/- on inorganic plots (Farmers Practice). The cost of chilli cultivation in organic farming was comparatively higher than the conventional practice because of use of bio inputs in the field. However, the averages net return of Organic chilli in different FLD plots was Rs. 58,167/- in contrast to Rs. 43,107/- in inorganic chilli. The organic farming recorded higher net return than that of the Farmers Practice. The B:C ratio was found to be 1: 2.28 in Organic chilli and 1: 2.00 in Inorganic chilli. Organic chilli growers were highly satisfied with their organic production and economic return. Chilli farmers were advised to switch over to organic farming which can give high return and minimize environmental degradation

Cosmological models with Big rip and Pseudo rip Scenarios in extended theory of gravity

In this paper, we have presented the big rip and pseudo rip cosmological models in an extended theory of gravity. The matter field is considered to be that of perfect fluid. The geometrical parameters are adjusted in such a manner that it matches the prescriptions given by cosmological observations, to be specific to the range of Hubble tension $(H_{0})$. The models favor phantom behavior. The violation of strong energy conditions are shown in both the models, as it has become essential in an extended gravity. The representative values of the coupling parameter are significant on the evolution of the universe.Comment: 14 pages, 18 figure

Magnetized cosmological model with variable deceleration parameter

In this paper, we have derived the field equations in an extended theory of gravity in an anisotropic space time background and in the presence of magnetic field. The physical and geometrical parameters of the models are determined with respect to the Hubble parameter using some algebraic approaches. A time varying scale factor has been introduced to analyze the behavior of the model. From some diagnostic approach, we found that the model behaves as $\Lambda_{CDM}$ model at late time of cosmic evolution.Comment: Accepted version, 9 pages, 15 figures

Bouncing cosmological model with general relativistic hydrodynamics in extended gravity

In this paper, in an extended theory of gravity, we have presented bouncing cosmological model at the backdrop of an isotropic, homogeneous space-time, in presence of general relativistic hydrodynamics (GRH). The scale factor has been chosen in such a manner that with appropriate normalization, the quintom bouncing scenario can be assessed. Accordingly, the bounce occurs at $t=0$ and the corresponding Hubble parameter vanishes at the bounce epoch. The equation of state (EoS) parameter and the energy conditions of the model have been analysed. The violation of strong energy condition further supports the behaviour of extended gravity. As the bouncing cosmology suffers with instability, this model also shows the similar behaviour.Comment: 10 pages, 9 figures, Accepted version IJGMM