Krylov-Bogoliubov-Mitropolskii (KBM) method has been extended for solving fourth order more critically damped non-linear systems. For different damping forces, the solutions obtained by the present method show good coincidence with numerical solutions. The method is illustrated by an example.

A technique is developed for obtaining the solution of second order over-damped non-linear systems based on the Krylov-Bogoliubov-Mitropolskii (KBM) method for small ratio of the eigenvalues. The solution is also useful for large ratio of the eigenvalues. The method is illustrated by an example.

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A second order nonlinear differential system modeling non-oscillatory processes by over damping is considered. Then second order approximate solution is found by means of an extension of the Krylov-Bogoliubov-Mitropolskii (KBM) method. The method is illustrated by an example. The solutions for different initial conditions show a good agreement with those obtained by numerical solution.

An investigation on floral biology of off-season jackfruit germplasms was carried out during mid July 2003 to mid November 2003 at the village Shakharipara, Rupdia, Jessore. This region is considered to be the largest jackfruit growing region of South-western region of Bangladesh. Six germplasms of more or less same aged have been selected for this study. The period for the floral bud development varied from 33 to 42 days with an average 36.8 days. Six distinct sequences of spike opening was observed on foot stalk. The availability of pollen grains and receptivity of female spike ranged from 3 to 6 days (average 4.5 days) and 8 to 12 days (average 10.26 days), respectively. Emergence of anther, stigma and dehiscence of anther occurred during day and at night. The peak emergence of anther and its dehiscence occurred during 2-4 A.M. and 4-6 P.M., respectively and the peak emergence of stigma at 8-10 A.M.