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ThesisItem Open Access A Study of Socio-Economic and Psychological Problems of Old Women in A village Community of Haryana(Department of Sociology College of Basic Sciences and Humanities College of Agriculture Chaudhary Charan Singh Haryana Agricultural University Hisar, 1991) Dahiya, Kanta; Singh, RajThesisItem Open Access Effect of HIgh Temperature on Flavonoid Production in Pigeonpea and its Influence on Production of IAA Like Compounds(College of Basic Sciences and Humanities Chaudhary Charan Singh Haryana Agricultural University Hisar, 1991) Raghuwanshi, Anshu; Dudeja, S.SThesisItem Open Access A Study of Uniformity Trial in Soyabean(College of Basic Sciences and Humanities Chaudhary Charan Singh Haryana Agricultural University Hisar, 1991) Khurana, Alka; Rai, LajpatThesisItem Open Access Evaluation of Soil Test and Establishment of Critical Limits of Available Phosphorus in Normal and Saline Soils(College of Agriculture Chaudhary Charan Singh Haryana Agricultural University Hisar, 1991) Chander, Krishan; Singh, RaghbirThesisItem Open Access A Study of Population Growth Models(Chaudhary Charan Singh Haryana Agricultural Univesity, Hisar, 1991) Kumar, Virender; Gupta, S. C.Study of population growth is of great practical importance in various fields of researches. In particular, its use in biological systems needs no emphasis. Its mechanism involves a multiplicity of variables, their interdependence and difficulties in measuring the effects of some of them. The use of models helps to include only the important variables to represent a real situation. Thus models simplify the given situation for convenience of analysis and are capable of providing population projections. Their usefulness arises out of tile fact that Actual counts of the population by census methods are available only at infrequent intervals. Whereas for statistical purposes, it is necessary to have as accurate an estimate as possible of the population in this year.