(i) Commercial grain cultivation is practised in the interior parts of semi-arid lands of the mid latitudes. (ii) Com, barley, oats and rye are grown with the principal crop ‘wheat’. (iii) Entire operations of cultivation from ploughing to harvesting are mechanised as the size of the farms is very large. , (iv) There is low yield per acre but high yield per person. (v) Such agriculture is developed in European Steppes, the Canadian and American Prairies, the Pampas of Argentina, the Velds of South-Africa and Downs in Australia, and Canterbury plains of New Zealand.