Right, but it's not like nothing would grow on it if you took good Canadian topsoil into the tropics, is it? I assume that even if there is a substantial differ

Right, but it's not like nothing would grow on it if you took good Canadian topsoil into the tropics, is it? I assume that even if there is a substantial difference that renders soil that is conducive to plant growth in one climate less suitable for it in another, the correction of this difference should not take the same amount of time as it takes for the "correct topsoil for the climate" to form from nothing, and in fact probably should be much faster.