SPECIAL REPORT-The fight over the future of food

* Backlash against GM crops complicates bid to feed world

* Resistance to science-based agriculture grows in U.S.

* Is a second Green Revolution needed, or even desirable?

By Claudia Parsons, Russell Blinch and Svetlana Kovalyova

NEW YORK/WASHINGTON/MILAN, Nov 10 (Reuters) - At first glance, Giuseppe Oglio's farm near Milan looks like it's suffering from neglect. Weeds run rampant amid the rice fields and clover grows unchecked around his millet crop.

Oglio, a third generation farmer eschews modern farming techniques -- chemicals, fertilizers, heavy machinery -- in favor of a purely natural approach. It is not just ecological, he says, but profitable, and he believes his system can be replicated in starving regions of the globe.

Nearly 5,000 miles (8,000 km) away, in laboratories in St. Louis, Missouri, hundreds of scientists at the world's biggest seed company, Monsanto, also want to feed the world, only their tools of choice are laser beams and petri dishes.

Monsanto, a leader in agricultural biotechnology, spends about $2 million a day on scientific research that aims to improve on Mother Nature, and is positioning itself as a key player in the fight against hunger.

The Italian farmer and the U.S. multinational represent the two extremes in an increasingly acrimonious debate over the future of food.

Everybody wants to end hunger, but just how to do so is a divisive question that pits environmentalists against anti-poverty campaigners, big business against consumers and rich countries against poor.

The food fight takes place at a time when experts on both sides agree on one thing -- the number of empty bellies around the world will only grow unless there is major intervention now.

A combination of the food crisis and the global economic downturn has catapulted the number of hungry people in the world to more than 1 billion. The United Nations says world food output must grow by 70 percent over the next four decades to feed a projected extra 2.3 billion people by 2050.

International leaders are gathering in Rome next week for the U.N. Food and Agriculture Organization's World Summit on Food Security and will hear competing arguments over how best to tackle the problem. One of the fiercest disputes will be over the relative importance of science versus social and economic reforms to empower small farmers to grow more with existing technology.

"LISTEN TO NATURE"

Much of Europe has moved away from an agricultural system of small farms to mass commercial farming, but Italy still retains a base of family farmers who produce everything from olives to mozzarella cheese.

Oglio is one of them. A charismatic 40-year-old, he dropped out of an agricultural school after growing disillusioned with the farming methods being taught there. Today, he lets nature run its course as he grows cereals and legumes on his small family farm in Belcreda di Gambolo, about 20 miles (30 km) southwest of Milan.