On this basis, capitalist production creates an average industrial rate of profit. It has no basis for expansion into agricultural production, at this point. Firstly, the peasants provide for themselves via their own direct production. Secondly, capitalist production requires large-scale production, which requires large markets to sell into. Whilst peasants provide for their own needs for food etc., no such large market for agricultural commodities exists. It is only when the growth of capitalist production, in the towns, expands faster, itself spurred by the opening up of global trade, in the 16th and 17th century, that its demand for raw materials, particularly wool, means that existing agricultural production is inadequate. The landlords begin to clear some of their lands, turning them over to sheep etc.
As Marx sets out in Capital III, as markets expanded, the landlords moved from payment of feudal rent as Labour Rent, or Rent in Kind (i.e. handing over agricultural commodities) to Money Rent. As he sets out, Money Rent represents the dissolution of feudal rent itself. The landlords sought money to buy the expanding range of commodities both those produced by urban capitalists and those brought in from abroad by the expanding commercial bourgeoisie. Money rents require the peasants to devote more of their time to the production of commodities for sale in the market, and less to the production of products for their own consumption.
Commodity production and exchange expand once more, as a consequence. But, the cottage industry of the peasants is increasingly undermined by the centralised, larger-scale and more efficient capitalist production in the towns. Increasing numbers of peasants are ruined and must become wage labourers. They must now buy as commodities the the agricultural products they previously produced for themselves. The market expands, and the basis for buying up their land, consolidating it into larger capitalist farms is, thereby, established.
Some of those industrial capitalists who had made their fortunes in the towns and cities, themselves, now, begin to invest capital in agriculture and primary production, as the potential for consolidating large capitalist farms opens up. The process of land enclosures, imposed by law, accelerates this process. But, as set out earlier, capital does not have to invest in agricultural production. It will do so only if it can make at least the average industrial rate of profit, after the payment of any rent.