FEASIBILITY OF SOIL BASED CYANOBACTERIAL CULTUREM.N JHA, A.N. PRASAD AND S.K MISHRAAbstract To study the feasibility of setting a soil based cyanobacterial biofertilizer unit, heavy inocula of each of the two cyanobacterial, i.e., Gloeotrichia pisum and Aphanothece pallida were mixed with soil samples collected from their respective natural habitats and their survival succession of cyanobacterial species was studied for a period of one year. None of the two cyanobacteria which were selected for the ease of identification as they form large mucilaginous colonies ever dominated the scene during the one year period indicating that at least these two cyanobacteria do not make a good choice to start a soil based biofertilizer unit, Oscillatoria sp. were the most dominant cyanobacteria except the period from December to February during which Spirogyra sp. were found to dominate over others. Decrease in nitrogen, phosphorus, dry matter content and an increase in C : N ratio was recorded in mucilaginous form of Gloeotrichia pisum and Aphanothece pallida. High C : N ratio and low dry matter content suggest that these two strains should be least preferred for the biofertilizer programme.
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