Indumati Shivaraj's routine has been the same for more than a decade — at dawn she walks to her "master's" house, mucks out the cattle shed, cleans the tools and sweeps the yard. Four hours later, she walks home.

Besides a cup of tea each day, Shivaraj, 45, gets about 3,000 Indian rupees ($40) a year and a few sacks of grains for her labor.

She is among thousands of Dalits — considered India's lowest caste in an ancient social hierarchy — who work for little or no pay in the homes of upper-caste families in Karnataka state under a custom called "bitti chakri" that was recently outlawed.