NAGAON, India, March 17 (Xinhua) -- In Nagaon district of India's northeastern state of Assam, local workers toil in the picturesque tea gardens as they wade through the waist-high tea bushes, pluck fresh leaves and move the picked leaves from the plantations.

Assam is known as the largest and most productive tea-growing area in India, as well as the birthplace of Camellia sinensis, an indigenous black tea variety of India. The producing and tea plucking season of this lush tropical region typically runs from March through October.