1. A survey on smart sensors in precision agriculture;Veena;Int. J. Adv. Eng. Res. Dev.,2018
2. https://www.pthorticulture.com/en/training-center/volumetric-water-content-sensors/.
3. http://stesalittea.com/twmac.php.
4. https://agrihouse.com/secure/shop/item.aspx?itemid=170.
5. https://agrihouse.com/secure/shop/item.aspx?itemid=134.