Incorrect. A plumber can spend 10 minutes to fix a leak, but the same plumber can spend 4 hours on apparently the same leak but a slightly trickier one. The sam

Incorrect. A plumber can spend 10 minutes to fix a leak, but the same plumber can spend 4 hours on apparently the same leak but a slightly trickier one. The same for farm - how much of the output depends on workers and how much on the environment and other factors?