A method of farming that emphasizes ecological principles in Tamil Nadu is:

The correct answer is Zero Budget Natural Farming (ZBNF).

ZBNF is a method of farming that emphasizes ecological principles. It is a non-chemical, non-pesticide, and non-fertilizer method of farming. It is based on the principles of natural farming, which is a method of farming that has been practiced for centuries in India.

ZBNF is a sustainable method of farming that can help to improve soil health, reduce water usage, and increase crop yields. It is also a cost-effective method of farming that can help to reduce farmers’ dependence on external inputs.

Here is a brief explanation of each option:

• Organic farming is a method of farming that uses natural methods to improve soil health, control pests and diseases, and increase crop yields. Organic farming does not use synthetic pesticides, herbicides, or fertilizers.
• Integrated farming is a method of farming that combines different agricultural practices, such as crop rotation, cover cropping, and intercropping, to improve soil health, control pests and diseases, and increase crop yields. Integrated farming can also include the use of some synthetic pesticides and fertilizers.
• Precision farming is a method of farming that uses technology to manage agricultural inputs, such as fertilizer and water, more precisely. Precision farming can help to reduce costs and improve crop yields.

I hope this helps!