what is double cropping?

Answer 1

double cropping (¦dəb·əl ′kräp·iŋ)
(agriculture) A form of multiple cropping in which two crops are grown on a field at different times of the year.

multiple cropping (′məl·tə·pəl ′kräp·iŋ)
(agriculture) A system of growing several food crops on the same field in one year.

Multiple cropping
Planting two or more species in the same field in the same year. Preserved through history to maintain biological, economic, and nutritional diversity, multiple-species systems still are used by the majority of the world's farmers, especially in developing countries. Where farm size is small and the lack of capital has made it difficult to mechanize and expand, farm families that need a low-risk source of food and income often use multiple cropping. These systems maintain a green and growing crop canopy over the soil through much of the year, the total season depending on rainfall and temperature. Systems with more than one crop frequently make better use of total sunlight, water, and available nutrients than is possible with a single crop. The family has a more diverse supply of food and more than one source of income, with both spread over much of the year.

Multiple-cropping patterns are described by the number of crops per year and the intensity of crop overlap. Double cropping or triple cropping signifies systems with two or three crops planted sequentially with no overlap in growth cycle. Intercropping indicates that two or more crops are planted at the same time, or at least planted so that significant parts of their growth cycles overlap. Relay cropping describes the planting of a second crop after the first crop has flowered; in this system there still may be some competition for water or nutrients. When a crop is harvested and allowed to regrow from the crowns or root systems, the term ratoon cropping is used. Sugarcane, alfalfa, and sudangrass are commonly produced in this way, while the potential exists for such tropical cereals as sorghum and rice. Mixed cropping, strip cropping, associated cropping, and alternative cropping represent variations of these systems. See also Agriculture; Agronomy.
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Answer 2

2 Stacks of corn. Ha ha ha