Actually, I should say “Use the fertilizer you’re already making.” While I believe compost is the best way to improve soil in most respects, growing food does remove nutrients from the soil. Compost can return some of these nutrients, and add nutrients if compost is “imported” as I do by bringing in leaves and manure from outside my yard. But, why not add a little fertilizer to help replace those nutrients? The good news is that you already have this fertilizer available and it’s free. You’re simply flushing it away, day after day. An Op-Ed piece in today’s New York Times talks about the need to change how we handle human waste (feces and urine) for environmental reasons. The article focuses on large scale waste issues. Here, I want to talk about small-scale human waste issues and how you can use them to your advantage.