Introduction:
Rajasthan is a state in northern India known for its diverse agricultural production. Pulses are an important crop grown in the state, and various districts contribute to their production. In this response, we will discuss the district in Rajasthan that is the largest producer of Pulses.

Answer:
The district in Rajasthan that is the largest producer of Pulses is Hanumangarh. Hanumangarh is located in the northern part of the state and is known for its agricultural productivity.

Reasons for Hanumangarh being the largest producer of Pulses:
- Favorable Climatic Conditions: Hanumangarh district experiences a semi-arid climate with hot summers and cold winters. This climatic condition is suitable for the cultivation of Pulses, which require a warm and dry climate.

- Availability of Irrigation Facilities: The district has a well-developed irrigation system, which ensures a consistent supply of water to the agricultural fields. Pulses require adequate irrigation, especially during the flowering and pod filling stages, and the availability of water in Hanumangarh contributes to higher yields.

- Rich Agricultural Land: Hanumangarh has fertile agricultural land, which is suitable for the cultivation of Pulses. The soil in the district is predominantly alluvial, which is ideal for the growth of Pulses. The farmers in Hanumangarh have been able to utilize this fertile land to maximize the production of Pulses.

- Adoption of Modern Farming Techniques: Hanumangarh has witnessed the adoption of modern farming techniques by the farmers. They have embraced mechanization, improved seed varieties, and scientific farming practices. This has led to increased productivity and better quality of Pulses.

- Government Support: The government has provided various schemes and subsidies to promote the cultivation of Pulses in Hanumangarh. This support has encouraged the farmers to invest in Pulses cultivation and has contributed to increased production.

Conclusion:
Hanumangarh district in Rajasthan is the largest producer of Pulses due to its favorable climatic conditions, availability of irrigation facilities, rich agricultural land, adoption of modern farming techniques, and government support. The district's farmers have been able to maximize the productivity of Pulses and contribute significantly to the state's agricultural economy.