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  • The Art and Science of Agriculture - Education
    Agriculture is the art and science of cultivating the soil, growing crops and raising livestock
  • The Development of Agriculture - Education
    The development of agricultural about 12,000 years ago changed the way humans lived They switched from nomadic hunter-gatherer lifestyles to permanent settlements and farming
  • Types of Crops - Education
    A crop is a plant or plant product that can be grown and harvested for profit or subsistence By use, crops fall into six categories: food crops, feed crops, fiber crops, oil crops, ornamental crops, and industrial crops
  • Environmental Impacts of Agricultural Modifications
    Agricultural livestock are responsible for a large proportion of global greenhouse gas emissions, most notably methane In addition, cows overgrazing pastureland is a major problem regarding environmental sustainability In some places, cows and other livestock consume stretches of forage land so extensively that grasses are unable to regenerate
  • Runoff - National Geographic Society
    Runoff occurs when there is more water than land can absorb The excess liquid flows across the surface of the land and into nearby creeks, streams , or ponds Runoff can come from both natural processes and human activity The most familiar type of natural runoff is snowmelt Mountains that cannot absorb water from heavy snowfalls produce runoff that turns into streams, rivers, and lakes
  • Lofty Ambitions of the Inca - Education
    Lofty Ambitions of the Inca Rising from obscurity to the heights of power, a succession of Andean rulers subdued kingdoms, sculpted mountains, and forged a mighty empire
  • Crops - National Geographic Society
    Crops are plants, or products made from plants, that are grown and harvested for subsistence or for profit Crops are typically divided into six categories: food crops, feed crops, fiber crops, oil crops, ornamental crops, and industrial crops Ever since hunter-gatherer societies shifted to become agricultural societies during the Neolithic period about 10,000 years ago, crops have become the
  • Agricultural Communities - Education
    Agricultural communities developed approximately 10,000 years ago when humans began to domesticate plants and animals By domesticating species, many groups of people were able to build settled communities and transition from a nomadic hunter-gatherer lifestyle dependent on foraging and hunting for survival
  • The Shift to Agriculture - Education
    From its origins during the Neolithic era, to its cultivation at Mesopotamia, on through the Bronze Age, the Renaissance, the Industrial Revolution, and beyond, the evolution of agriculture has been and continues to be the main driving force of complex societies around the globe
  • Population Density - National Geographic Society
    Population density is the concentration of individuals within a species in a specific geographic locale Population density data can be used to quantify demographic information and to assess relationships among ecosystems, human health and infrastructure





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