“STUDY OF THE INFLUENCE OF NITRIC ACID ENRICHMENT OF PHOSPHORITES OF THE CENTRAL KYZYLKUM ON THE PROCESS OF OBTAINING PHOSPHORUS-CONTAINING FERTILIZERS BASED ON THEM”. International Journal of Advance Scientific Research, vol. 3, no. 06, June 2023, pp. 302-1, https://doi.org/10.37547/ijasr-03-06-50.