Vivasayam is the Tamil word for agriculture, which is the practice of cultivating crops and raising animals for food and other purposes. Vivasayam is an ancient and important occupation that has shaped the culture, economy and environment of Tamil Nadu and other parts of India. Vivasayam is also a source of knowledge and wisdom that can help us live in harmony with nature and improve our health and well-being.

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One of the aspects of vivasayam that is gaining popularity and relevance in the modern world is iyarkai vivasayam, or organic farming. Organic farming is a method of vivasayam that avoids the use of synthetic chemicals, pesticides, fertilizers and genetically modified organisms (GMOs) and relies on natural inputs, processes and principles to enhance soil fertility, crop diversity, pest control and animal welfare. Organic farming can reduce environmental pollution, conserve natural resources, increase food quality and safety, and support rural livelihoods.

Another aspect of vivasayam that is essential for food security and nutrition is kaalnadai valarppu, or animal husbandry. Animal husbandry is the branch of vivasayam that deals with the care, breeding, feeding and management of domestic animals such as cows, goats, sheep, poultry, pigs, etc. Animal husbandry can provide valuable products such as milk, eggs, meat, wool, leather, etc. as well as services such as draught power, manure, companionship, etc. Animal husbandry can also enhance soil health, crop production and biodiversity through integrated farming systems.

If you are interested in learning more about iyarkai vivasayam and kaalnadai valarppu in Tamil language, you can download some useful books in PDF format from the following sources:

- [Vivasayam in Tamil - Vivasayam | விவசாயம்](https://www.vivasayam.org/): This website offers a variety of articles, videos, podcasts and books on various topics related to vivasayam in Tamil. You can find books on iyarkai vivasayam, kaalnadai valarppu, mooligai maruthuvam (herbal medicine), kaalnadai seithigal (animal news), etc.

- [வேளாண்மை - தமிழ் விக்கிப்பீடியா](https://ta.wikipedia.org/wiki/%E0%AE%B5%E0%AF%87%E0%AE%B3%E0%AE%BE%E0%AE%A3%E0%AF%8D%E0%AE%AE%E0%AF%88): This is the Tamil Wikipedia page on vivasayam, which gives an overview of the history, science, types, methods and issues of vivasayam in Tamil Nadu and around the world. You can find links to other related pages on iyarkai vivasayam, kaalnadai valarppu, thottakkalai (horticulture), etc.

- [இயற்கை விவசாயம் மற்றும் கால்நடை வளர்ப்பு பற்றிய புத்தகம் PDF வடிவில்](https://www.imperialhorticulturetips.com/2021/06/organic-farming-books-tamil-free-download.html): This blog post provides a list of 10 free PDF books on iyarkai vivasayam and kaalnadai valarppu in Tamil. You can download these books from Google Drive links and read them on your computer or mobile device.

We hope you find these resources helpful and informative. Happy reading and learning!

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