How did crop rotation increase production in the agricultural revolution?
a. by allowing farmers to leave fields fallow lass oftenb) by reducing how often farmers had to till the soilc) by limiting the damaging presence of nitrogen in the soild) by decreasing the growth of weeds in feilds?

a. by allowing farmers to leave fields fallow less often

Explanation:

The process of crop rotation increased productivity because it ensured that the land could remain productive for longer periods of time.  Before this, farmers had to let some fields lie fallow for some time in order for the soil to replenish nutrients and be able to yield adequate crops again.  Since not all plants require the same amount of nutrients and provide different benefits to the soil, rotating crops proved to be an excellent way of maintaining good properties in the earth and, thus, increasing productivity during the Agricultural Revolution.

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explanation:

b) that he was not a free man