Well because the labour in say this country is over productive, this has an awful lot of categories attached to each unit of labour, that's why labour is very productive, is that you for each unit of labour employed there might be ten units of capital, I E there are chemicals  etcetera, the reason why erm this  this pressure on the land in say Africa, Africa, even though the density of population was much less and that there's virtually no capital there, right, so in order to produce the food, you know the labour has to till the soil by hand and spread the seed by hand