It's not cannabis, but the  sativa  species of this crop is the most widely consumed.
A massive 2,000-year-old system for growing this crop was built by the Igorot  (ego-ROTE)  inhabitants of the Ifugao  (ee-foo-GOW)  region. Many growers of this crop simultaneously grew the mosquito fern to promote this crop's well-being. It's not cannabis, but the  sativa  species of this crop is the most widely consumed. Activist Vandana Shiva vehemently opposes the development of a genetically modified Vitamin A-rich (*)  "golden" form of this crop. This crop is grown in the Philippine Cordilleras in a series of hand-carved terraces. Water buffalo are often used to plow fields of this crop, whose varieties include India's basmati and Thailand's jasmine. For 10 points, name this grain often grown in paddies, a staple of many cuisines throughout Asia
A massive 2,000-year-old system for growing this crop was built by the Igorot  (ego-ROTE)  inhabitants of the Ifugao  
rice  [or  Oryza  sativa ; accept Asian  rice ]