The First Agricultural Revolution 14000 years ago was when the domestication of plants and animals. It was when humans transitioned from hunting to farming. It also was used for domestic farming. They used burn and slash method to experiment.
The second Agricultural Revolution 17 and 18 century when they went beyond agriculture to help feed thousands of people. With more technologies it helped for bigger farms less wasting of seeds and better planting rows to help distinguish weeds and plants.
The third revolution(the green revolution) 1970s and 1980swas when they enhanced products to make more in the same amount of land. Better crops to live in tougher climates. It also solved the hunger problems in some regions around the world. There are some questions about it like soil degradtion