ON the roadside of Paciran-Sukodadi, Banjaranyar village, Paciran, Lamongan, a limestone grinder was roaring noisily. A number of workers were pouring ground limestone into plastic sacks.

Tons of dolomite and phosphate powders are produced by a business unit of Pondok Pesantren Sunan Drajat (Islamic boarding school). “We can produce 300 tons of dolomite fertilizer daily,” said Abdul Ghofur, head of the school.

In addition to dolomite, Ghofu