Farmers have used guano as fertilizer for thousands of years, and it’s still considered one of the best natural soil enhancers today. It strengthens roots, speeds up growth, and even improves soil ...

It started even before the Incas. Ever since, Peruvians have cherished the 40 million sea birds whose droppings make high-grade fertilizer (guano) for Peruvian farmers. In Inca days, the penalty for ...