If Muharram, a farmer from Pao Pao village in South Sulawesi, had doubts about the benefits of organic farming, they were gone by his first harvest. The 32-year-old was able to harvest six tons of paddy from his one-hectare farm. Before, he was only to harvest four.

"I started using organic fertilizer in 2014. At first I applied it three times on the crops during a single season," he said.

Since that first harvest, however, he has only had to apply f