1. A lot of rainfall
2. Good irrigation facilities
3. A long growing period
4. Alluvial soils
Explanation: In agriculture, multiple cropping is the practice of growing two or more crops in the same piece of land during the single growing season. It is a form of poly culture. It can take the form of double cropping, in which a second crop is planted after the first has been harvested, or relay cropping in which the second crop is started amidst the first crop before it has been harvested. Related practice, companion planting, is sometimes used in gardening and intensive cultivation of vegetables and fruits. One example of multi cropping is tomatoes+onions+marigold; the marigolds repel some tomato pests.