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Organic farming is a technique of producing crops, in which the use of synthetic and chemical inputs like fertilizers, pesticides, growth regulators and livestock feed additives is avoided. To reduce the harm caused by indiscriminate use of synthetic chemicals, organic materials such as farm manure, compost, vermicompost, biofertiliser, biopesticide and so on, can be used, at least as complement, if not as substitute. The present book incorporates articles on organic farming, biofertilisers, PGPR bioinoculant, role of mycorrhizae in agriculture, biopesticides, VAM biotechnology and economics of bio-inputs usage in agriculture.