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In page Green Revolution:

"

In the 1960s, rice yields in India were about two tons per hectare; by the mid-1990s, they had risen to 6 tons per hectare. In the 1970s, rice cost about $550 a ton; in 2001, it cost under $200 a ton.[4] India became one of the world's most successful rice producers, and is now a major rice exporter, shipping nearly 4.5 million tons in 2006.[citation needed]