The concept of two-phase sampling was first given by Neyman (1938), later on several simple and general regression and ratio estimators have been suggested, starting from Mohanty (1967), Srivastava (1970), Chand (1975), Kiregyera (1980, 84), Mukerjee et al. (1987), Srivastava et al.(1990), Roy (2003)and Samiuddin and Hanif (2006,07). Use of multi-auxiliary information for ratio and regression estimators, were considered, by Olkin (1958), Goswami and Sukhatme (1965), Raj (1965), Rao and Mudholkar (1967), Tripathi (1970, 1976), Tripathi and Ahmed (1995), Sen (1972), Tripathi...
The concept of two-phase sampling was first given by Neyman (1938), later on several simple and general regression and ratio estimators have been su...
The present manual is of immense importance for the researchers, teachers and scholars in the field of biological sciences.It will also prove of great importance to the industrialists for developing an effective mycorrhizal cultures on commercial scale.The mycorrhizal fungi are playing a multipurpose role in the crop improvement programmes by improving the plant health through the acquisition of many micro and macro nutrients.The use efficiency of different nutrient elements is also enhanced by AM fungi. Mycorrhizae provide protection to the plant roots against many soil borne...
The present manual is of immense importance for the researchers, teachers and scholars in the field of biological sciences.It will also prove of great...
