Water from rivers is the only source for irrigation in the fields
A. True
B. False

Hint: Irrigation is the process of applying water in fields at controlled amounts. In addition to it, there are many sources of water for irrigation in the fields.

Complete answer:
The process of applying controlled amounts of water to plants at needed intervals is called irrigation. Irrigation is used for many purposes which include agricultural crops, maintaining landscapes, and revegetating disturbed soils in dry areas and during periods of less than average rainfall. The river is not the only source of water for irrigation in the fields. There are many other sources of water which include underground water, surface water, and non-conventional sources. The groundwater source refers to the water from a spring or well. Surface water can be withdrawn from rivers, lakes, or reservoirs. Non-conventional source of water includes the treated wastewater, desalinated water, and drainage water. There are different types of irrigation methods. They are surface irrigation, micro-irrigation, sprinkler irrigation, and subirrigation.
So, the river is not the only source of water for irrigation in the fields. Therefore, the above statement is incorrect.
Hence, option B: false is the right answer.

Note: Various other uses of irrigation include cooling livestock, dust suppression, disposal of sewage, and mining. The agriculture which relies only on direct rainfall is called rain-fed. Spate irrigation is a special type of irrigation that uses surface water and it is also called floodwater harvesting. Rainwater harvesting is not usually considered as a form of irrigation because the term rainwater harvesting refers to the collection and concentration of runoff water from roofs or unused land.