The Green Devolution; India's population is growing faster than farm output, threatening one of its most prized achievements.

Byline: Jason Overdorf

The furnace Australia sailed into Chennai last month carrying a load of wheat and, some warned, ill tidings. India's first wheat imports in six years marked a reversal in the march toward "food independence" that the country began in the 1970s. To M. S. Swaminathan, one of the agronomists credited with sparking the so-called Green Revolution, the return of grain imports should be seen as "a wake-up call" for a country that has in recent years taken its ability to feed its people for granted.

Though India's government officially dismissed the return of grain imports as a passing event, Swaminathan and other experts saw it as the latest sign of a long-term decline. The growth rate of grain production has fallen from 1.5 percent before 1995 to 1 percent today, due to a combination of bad management, unpredictable weather and a growing water shortage. Meanwhile, the growth rate for all crops has fallen to 1.25 percent a year, the lowest level since India gained independence in 1947, says Ramesh Chand, acting director of India's National Centre for Agricultural Economics and Policy Research. That's too slow to keep pace with a population now growing, according to United Nations estimates, at a rate of 1.5 percent a year. Chand says the threat to India's food independence is manageable, if the government makes the right moves.

These are sobering indicators for the Green Revolution, which was originally inspired by grave threats to the food supply in India. After back-to-back droughts put the country in danger of massive starvation in 1966, a U.S. presidential-advisory commission called for an "effort unprecedented in human history" to raise farm output around the world. And so it did, as scientists produced new strains of rice and wheat that boosted yields by a factor of five, with the help of heavy irrigation and applications of chemical fertilizers and pesticides. In India, an initially well-executed campaign raised grain output from 82 million metric tons in 1960 to 176 million tons in 1990 and cut imports to zero by 2000. That is, until the trend reversed last month.

Now production gains are slowing as the water supply dwindles, overzealous use of fertilizer and pesticides taints the soil and excessive irrigation waterlogs the land along canals in the showpiece states of India's Green Revolution, like the Punjab and Haryana.

Because irrigated land is two and ahalf times more productive than rain-fed land, many of the gains of the Green Revolution were produced by an increase in the area under irrigation. But as India's population and economy grow, water supplies are shrinking. Already, the World Bankestimates, India meets most of its irrigation and household demand by tapping groundwater--a practice that is "no longer sustainable."

Similar threats haunt China and other developing nations that were big beneficiaries of the Green Revolution. China has responded by relaxing its commitment to being completely self-sufficient in the production of food--encouraging farmers to grow more lucrative fruits and vegetables, while importing wheat and soybeans. To free-trade advocates, this approach makes sense--why obsess over "food independence" in an increasingly global free market, if others grow wheat more efficiently than you do? Focus on the goods, agricultural or not, that you grow most efficiently.