The higher the surplus, the more livestock can be established and maintained, thereby increasing the physical and economic well-being of the farmer and his family. A better diet could result in better stamina, better over-all health, and better, more efficient work. In addition, the more the surplus the more draft animals—horse and ox—could be supported and harnessed to work, and manure, the soil thereby easing the farmer's burden. Increased crop yields meant fewer hands were needed on farm, freeing them for industry and commerce. This, in turn, led to the formation and growth of cities.
Formation and growth of cities meant an increased demand for food stuffs by non-farmers, and their willingness to pay for it. This, in turn, led the farmer to (further) innovation, more intensive farming, the demand/creation of new and/or improved farming implements, and a quest for improved seed which improved crop yield. Farm families not only ate better, but could buy more manufactured goods.
For example, if three grains are harvested for each grain seeded, the resulting yield is 1:3) which is considered by agronomists as the minimum required to sustain human life. One of the three seeds must be set aside for the next planting season, the remaining two either consumed by the grower, or for livestock feed.
Historically speaking, a major increase in crop yield took place in the early eighteenth century with the end of the ancient, wasteful cycle of the three-course system of crop rotation whereby a third of the land lay fallow every year and hence taken out of human food, and animal feed, production.
It was to be replaced by the four-course system of crop rotation, devised in England in 1730 by Charles Townshend, 2nd Viscount Townshend or "Turnip" Townshend during the British Agricultural Revolution, as he was called by early detractors.
In the first year, wheat or oats were planted; in the second year, barley or oats; in the third year, clover, rye, rutabaga and/or kale were planted; in the fourth year, turnips were planted but not harvested. Instead, sheep were driven on to the turnip fields to eat the crop, trample the leavings under their feet into the soil, and by doing all this, fertilize the land with their droppings. In the fifth year (or first year of the new rotation), the cycle began once more with a planting of wheat or oats, resulting, on average, a thirty percent increased yield.
Long-term cereal yields in the United Kingdom indicate 500 kg/ha in Medieval times, jumping to 2000 kg/ha in the Industrial Revolution, and jumping again to 8000 kg/ha in the Green Revolution. Each technological advance increasing the crop yield also reduces the society's ecological footprint.
- Actual Production History
- Agricultural productivity
- Crop rotation
- Crop failure
- Green Revolution
- Second Green Revolution
- Sustainable agriculture
- Yield (wine)
- Pipes, Richard, Russia under the Old Regime (Charles Scribner's Sons, NY 1974) p.8
- Durant, Will, The History of Civilization: Vol. IX The Age of Voltaire p.47
- —Max Roser and Hannah Ritchie, Yields and Land Use in Agriculture, 2016