70 acres is a good bit of plots there buddy. If your plots are accessible, I would check into chicken poop. I do know a guy. It might be cheaper. Lime stays in the ground for a while so you want have a big expense every year on that and fertilizer will change levels as well depending on what you plant and lose through soil leaching. Get that soil tested before sinking a lot of money in to it. 200# is a good starter.