I haven't mastered brain surgery or women, yet! Click my profile and you'll see why I know about diesels and lawns. At the research station where I work we have a couple acres of 4'x8' turf grass plots. Each one of these over 1000 plots is different in some way, planting methods & dates, seed types & rates, fertilizer, water, mowing, etc. Some folks may not think lawns apply to agriculture but with the urbanization of much of our farmland lawns are becoming one of the predominate crops grown in this country. Over 15,000 acres per day of Ag land is lost to houses in the US.
People gripe about farm subsidies but without them American farmers couldn't compete with cheap foreign labor and lack of laws, they would go under. Many are even with help. Sure we could import our food from China and Latin America but what happens when they get POed at us and decide to cut off our food supply? We'd be up that well known creek.