Knowledge based assessment of trained certified farm advisors (CFA) on organic farming oleh CHANDRA BHANU, N RAVISANKAR, P C GHASAL, JAIRAM CHOUDHARY, RAGHUVEER SINGH, K J RAGHVENDRA, A L MEENA, L K MEENA, D DUTTA, R P MISHRA, N BALASUBRAMANI, A SADALAXMI, A S PANWAR