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M. Sc. Dissertations

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20112
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Subject: Statistics × End date: 2011 × Start date: 2010 × Type: Thesis ×
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    ThesisItemOpen Access
    A study on two-sex parity dependent population growth model
    (CCSHAU, 2011) Rout, Manoj Kumar; Gupta, S.C.
    The classical model of Lewis and Leslie (1945, 1948) has been extensively used for the study of population growth in various fields. However, complex growth structures require the use of more general models. The model of Kapur (1979) allows harvesting in the system, is an initial step to move in this direction. However, the need is being felt to develop more general models considering the effect of harvesting on the reproductive structure of living organisms. In the present work, a two-sex parity dependent population growth model is proposed where birth, death and harvest rates of males and females are the functions of two parity groups viz. zero parity and non-zero parity. The conditions for growth, extinction and stability of the population have also been derived. The model has been applied on the crossbred cattle population by taking 11 years data (2000-2010) collected from Department of Animal breeding, CCS HAU, Hisar. The sex-wise projected cattle population in two parity groups have also been found and the validity of model has been tested by applying chi-square for goodness of fit and found that the model fits well. A uniform harvesting strategy have also been derived for stable population structure. Observed and projected cattle population structure for males and females of two parity groups under different harvesting situations have also been shown by tables and graphs.
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    ThesisItemOpen Access
    Co-integration approach for estimation of supply response of major crops in Haryana
    (CCSHAU, 2011) Vikas; Manocha, Veena
    The present study is an attempt to estimate the acreage and yield response functions for major crops in Haryana within the framework of co integration and error correction model and to compare the short-run and long-run supply elasticities of major crops. The long-run acreage response to lagged price was positive and significant in the case of rice, rapeseed-mustard and sugarcane with elasticity values 0.19, 0.22 and 0.29, respectively. In case of other crops except bajra and gram, very low positive but non significant price elasticities have been observed. In the short-run, lagged price elasticities were found to be positive for all the crops. However, the positive significant values have been observed in case of rapeseed-mustard, sugarcane and bajra. The long-run acreage response to lagged year yield was found to be positive and significant in case of rice, wheat and cotton (Am.) with elasticity values 0.26, 0.18 and 0.29, respectively,. Irrigation elasticity has been observed to be positive for all the crops in the long-run, while it is positive for all the crops except gram and rapeseed-mustard in the short-run. However, only wheat and sugarcane are found to be positively and significantly responsive to irrigation in the long-run as well as short-run. The long- run yield response to price has been observed to be very low and non-significant in case of all the crops except wheat, rapeseed-mustard and sugarcane. The yield response to irrigation has been observed to be positive and significant in case of wheat, rapeseedmustard and cotton (Am.) only.