Rock phosphate used for the production of phosphatic fertiliser is mined at

ANS:A - Amjhor (Jharkhand)

Amjhor is a locality in the state of Jharkhand, India. It is known for its deposits of various minerals, including iron ore, coal, and manganese. However, there is no significant record or information available regarding Amjhor being a major source of rock phosphate mining. Jharkhand is more renowned for its coal and iron ore reserves rather than phosphate deposits. While Jharkhand does have some geological formations that may contain phosphatic deposits, such as sedimentary rocks and lateritic soils, these are not typically exploited on a large scale for the production of phosphatic fertilizers. Instead, phosphatic fertilizers in India are primarily produced using rock phosphate mined from locations like Bailladella in Madhya Pradesh, which is one of the major sources of rock phosphate in the country. Therefore, while Amjhor may have some geological significance for other minerals, it is not widely recognized as a significant source of rock phosphate used in the production of phosphatic fertilizers.