Option 1 states that organic farming involves the use of chemical fertilizers to improve soil fertility. However, this is not a characteristic of organic farming. In fact, organic farming avoids the use of synthetic chemical fertilizers and relies on natural methods of soil fertility management.

Option 2 states that organic farming involves frequent decomposing and fallowing. This is partially correct. Organic farming does involve practices such as composting and crop rotation, which may include periods of fallow land. These practices help to build soil fertility naturally and reduce the dependence on external inputs.

Option 3 states that organic farming involves the use of herbs to control pests. This is correct. Organic farming emphasizes the use of natural methods of pest management, including the use of beneficial insects, companion planting, and the use of herbal extracts or preparations to control pests and diseases.

Option 4 states that organic farming has higher productivity per hectare. This is not necessarily true. Organic farming may not always have higher yields compared to conventional farming, especially in the short term. However, organic farming focuses on long-term sustainability and soil health, which can lead to improved productivity over time.

Therefore, the correct answer is option 3 - characteristics of organic farming include frequent decomposing and fallowing, as well as the use of