1. The document discusses different types of farming systems including specialized farming, diversified farming, mixed farming, dry farming, irrigated farming, extensive farming, intensive farming, and organic farming.
2. It also describes some indigenous Indian farming systems such as shifting cultivation, taungya cultivation, and zabo cultivation. Shifting cultivation involves clearing forests for crops and then leaving the land fallow.
3. The principles of farming systems discussed are risk minimization, recycling of wastes, integration of enterprises, optimal resource use, and ecological balance.