The British Agricultural Revolution, or Second Agricultural Revolution, was the unprecedented increase in agricultural production in Britain due to developments in labor and land productivity between the mid-17th and late 19th centuries. The main cause of change seems to have been the rapidly growing population (from around 6 million in 1700 to 11 million in 1801), especially in the towns, which generated an increased demand for food. This was particularly important during the Napoleonic Wars since Napoleon's Continental System prevented all trade with Europe; Britain had to produce more food, or starve.
The 18th century saw the replacement of the three-field system of wheat–barley–fallow bythe four-course crop rotation system (wheat–turnips–barley–clover), which was designed to ensure that no land would need to lie fallow between periods of cultivation because if crops are rotated correctly they absorb different kinds and quantities of nutrients from the soil.
As a result, The second agricultural revolution allow farmers to leave fields fallow less often, letter A.
Answer:
A; by allowing farmers to leave fields fallow less often
Explanation:
