Abiove said it was aware that some soy was planted in areas where regrown forests had been cut.
The discrepancy over how to define a forest has huge implications for conservation.
Deforestation, drought and heat driven by climate change bring the rainforest closer to a
tipping pointbeyond which it starts an irreversible transformation into a savannah.
Viola Heinrich, a post-doctoral researcher at the GFZ Helmholtz Centre for Geosciences, who has extensively studied secondary forests in the Amazon, said these were "crucial" in limiting global warming even if initially less biodiverse.
Secondary forests absorb carbon at a faster rate than old-growth forests, but store less of it.
On a scorching afternoon late last year, on the outskirts of Santarem, a port city by the Amazon River, farmers were in the last stages of clearing land. Felled trees were neatly stacked up in rows, ready to be burnt.
Some of these trees were around three decades old, part of a secondary forest on land that was once razed to make way for cattle but later abandoned, satellite images showed.
"What can be stolen once, can be stolen again," said Gilson Rego, of the Pastoral Land Commission, a church-affiliated group working with locals affected by deforestation, as he pointed to surrounding areas where soy had been planted.
More than a dozen soy and subsistence farmers who spoke to Reuters said the main draw was the nearby Cargill terminal from where soy is shipped worldwide because it reduces costs for logistics. Cargill did not respond to requests for comment.
The boom helped Brazil overtake the United States in 2020 as the world's largest soy exporter.
About two thirds of it ships to China, whose largest buyer, Cofco, has signed up to the Moratorium and said earlier this year that it was committed to it. Nearly all of it is used to fatten animals for meat production.
Still, Song estimated an additional 6 million hectares of the rainforest would have been lost to soy in Brazil without the Moratorium and related conservation efforts, considering the pace of expansion elsewhere. Neighboring Bolivia, he said, had become a deforestation hot spot.
Brazilian farmers have always opposed the Moratorium and complained that even a small amount of deforestation can lead traders to block purchases from entire farms, a policy that Abiove is considering changing.
Thousands of properties that cover some 10% of soy's footprint in the region are currently blocked.
Adelino Avelino Noimann, the vice president of the soy farmers association in Para state, where Santarem is located, said the soy boom was creating opportunities in a poor country.
"It's not fair that other countries in Europe could deforest and grow, and now we are held back by laws that are not even ours," said Noimann.
LEGAL ATTACKS
Farming groups allied with right-wing politicians, once a fringe movement, have launched lawsuits and legislative attacks on the Moratorium in the capital Brasilia, and half a dozen major agricultural states,
seeking to weaken its provisions.
At the end of April, a justice from Brazil's Supreme Court said it would allow the country's biggest farming state, Mato Grosso, to
withdraw tax incentives from signatories of the Moratorium.
The ruling still needs to be confirmed by the full court.
Andre Nassar, the president of Abiove, the soy industry body that oversees the Moratorium, has already hinted that it could weaken rules to appease farmers.
"The solution is not ending the Moratorium or keeping it as it is," Nassar told senators in April. "Something needs to be done."
Global traders including ADM, Bunge, Cargill, Cofco and Louis Dreyfus Company had all signed up back in 2006.
Abiove and the grain traders it represents have declined to publicly discuss details but environmental group Greenpeace, which is part of some discussions, said last year that behind closed doors there was
a push from traders to weaken it.
Environmentalists like Andre Guimaraes, an executive director at IPAM, another nonprofit that monitors the agreement, said that even with its faults it was important.
"We still see the expansion of soy in the Amazon," he said. "But it could be worse." Other environmentalists said it should be reinforced by closing loopholes.
Abundant water and nutrient-rich soil are the main reasons farmers from other parts of the country, including the soy heartland Mato Grosso, have moved to Para.
"Here, we can have as many as three harvests," said Edno Valmor Cortezia, the president of the local farmers union, adding that farmers there can grow soy, corn and wheat on the same plot in a single year.
In the municipality Belterra near Santarem, soy expansion stopped short only at a local cemetery and school.
Raimundo Edilberto Sousa Freitas, the principal, showed Reuters court records and supporting evidence for two instances when 80 children and teachers had symptoms of pesticide intoxication last year.
One farmer was later fined, the records showed, but the crop continues to claim more of the area every year.
Occasionally, a few imposing trees that are protected by law are left in sprawling fields of soy, the last reminder of the lush biome that was once there.
Source: Reuters