FFECT OF CYANOBACTERIA ON GROWTH AND YIELD OF RICE VARIETIES IN KONASEEMA PADDY FIELDS-A DELTA REGION OF EAST GODA VAW DISTRICT (ANDHRA PRADESH)T.M. RADHAKRISHNAN AND B.VENKATA RAMANAbstract Nostoc is one of the most dominant species of blue-green algae in the paddy fields. Four different cyanobacterial species and their effects on rice growth and grain yield have been studied on short duration of rice cv. MTU - 1001, MTU - 1010, MTU - 3626 and ffiT - 1444 during the Rabi season. In our studies N.spongiaeforme is identified as one of the suitable biofertilizers for improving more than 45% of the rice grain yield in sandy loam areas of Konaseema in East Godavari District of Andhra Pradesh. Biofertilizer usage is a latest input technology in agriculture, which contribute eco-friendly, and cost effective yield of rice, which is one of the targets in Vision 2020.
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