A major challenge to agriculture in Manipur is:

Limited land availability
Lack of irrigation facilities
Soil erosion
All of the above

The correct answer is: d) All of the above.

Manipur is a landlocked state in northeastern India. It is bordered by Nagaland to the north, Assam to the west, Mizoram to the south, and Myanmar to the east. The state has a population of over 2.8 million people.

Agriculture is the main occupation in Manipur. The state is known for its production of rice, maize, sugarcane, and vegetables. However, the state faces a number of challenges to agriculture, including limited land availability, lack of irrigation facilities, and soil erosion.

Limited land availability is a major challenge to agriculture in Manipur. The state has a population density of over 400 people per square kilometer, which is one of the highest in India. This means that there is a lot of pressure on land for other uses, such as housing and industry. As a result, there is less land available for agriculture.

Lack of irrigation facilities is another major challenge to agriculture in Manipur. The state receives an average annual rainfall of over 2,000 millimeters. However, the rainfall is not evenly distributed throughout the year. There is a long dry season from November to April, during which time crops need to be irrigated. However, the state does not have a well-developed irrigation system. As a result, farmers often have to rely on rain-fed agriculture, which is not always reliable.

Soil erosion is another major challenge to agriculture in Manipur. The state is located in a mountainous region, and the soil is often loose and prone to erosion. This is a particular problem in the hills, where the land is often steep and there is a lot of rainfall. As a result, the soil can be easily washed away by the rain.

All of these challenges make it difficult for farmers in Manipur to produce enough food to meet the needs of the population. The state government is working to address these challenges, but it is a difficult task.