From ashes to fly larvae, new ideas aim to revive farm soil

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As extreme weather and human activity degrade the world’s arable land, scientists and developers are looking at new and largely unproven methods to save soil for agriculture. | Reuters

Biochar, liquid clay and fly larvae droppings are all in limited commercial production. Development of such solutions has accelerated in recent years as soil degradation worsened, said Ole Kristian Sivertsen, chief executive of liquid clay company Desert Control, which made its first commercial sale in December.

“We have really started to focus on the soil in ways we traditionally wouldn’t have done,” Berninger said in an interview.Biochar is an artificial means of creating a carbon-rich product to boost soils, modeled after exceptionally fertile patches of Amazon rainforest called “Dark Earths” that were produced over time as a byproduct of cooking, animal decomposition and manure.

More research is needed, however, before scientists know how effectively biochar could regenerate different types of soils around the world, she said. In November, Desert Control signed a $182,000 contract with Limoneira Company, which will initially apply liquid clay to 4,000 trees on two of its citrus farms in the drought-stricken states of California and Arizona. Depending on results, Limoneira intends to expand application in the fourth quarter.“Cover crops and no-till are good practices but they are far from enough,” Sivertsen said.

 

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