briefly explain what is the connection between improvement of cultivation and higher yield
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In agriculture, crop yield (also known as "agricultural output") refers to both the measure of the yield of a crop per unit area of land cultivation, and the seedgeneration of the plant itself (e.g. if three grains are harvested for each grain seeded, the resulting yield is 1:3). That figure, 1:3, 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 one for human consumption and the other for livestock feed[citation needed]. 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. This, in turn, resulted in better stamina, better over-all health, and better, more efficient work. In addition, the more the surplus the more draft animals—horse and oxen—could be supported and harnessed to work, and manure, the soil thereby easing the farmer's burden. Increased crop yields meant few hands were needed on farm, freeing them for industry and commerce. This, in turn, led to the formation and growth of cities.
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