USA HISTORY

Detailed explanation-1: -This was in part due to their increasing domestication of plants. Humans are thought to have gathered plants and their seeds as early as 23, 000 years ago, and to have started farming cereal grains like barley as early as 11, 000 years ago. Afterward, they moved on to protein-rich foods like peas and lentils.

Detailed explanation-2: -The Agricultural Revolution brought about experimentation with new crops and new methods of crop rotation. These new farming techniques gave soil time to replenish nutrients leading to stronger crops and better agricultural output. Advancements in irrigation and drainage further increased productivity.

Detailed explanation-3: -The Neolithic or agricultural revolution resulted in a demographic transition and major increases in population (Table 6.1) and population density (Table 6.3). The population of hunter–gatherers rose at a very low rate constrained by the carrying capacity of the land (see Chapter 4, Fig. 4.1).

Detailed explanation-4: -The Neolithic Revolution, or the (First) Agricultural Revolution, was the wide-scale transition of many human cultures during the Neolithic period from a lifestyle of hunting and gathering to one of agriculture and settlement, making an increasingly large population possible.