The system with minimal use or no use of chemical substances is called [[1]] 

Concept: Organic farming may be a shape of agrarian hones in which all the normal procedure and items are utilized such as edit revolution, green manure, compost and natural bug control rather than chemically synthesized fertilizers or bug control. 

Hence, the natural cultivating could be a cultivating framework with negligible or no utilize of chemicals such as fertilizers, herbicides, pesticides.

Hence,the correct answer is organic farming.