AiimsMineral NutritionAIIMS 2018MCQ+1 / -0.332018Azolla is used as a biofertiliser because itAhas association of mycorrhizaBmultiplies at faster rate to produce massive biomassChas association of nitrogen-fixing RhizobiumDhas association of nitrogen-fixing cyanobacteriaCheck AnswerClear SelectionReveal AnswerShow Explanation