Publication Date
1993
Description
Seven field trials were conducted, in soils of volcanic origin, to evaluate the agronomic effectiveness of partially acidulated phosphate rocks (PAPRs), as influenced by type of acidulant, degree of acidulation, fineness of grinding and reactivity of phosphate rock, and hardness of the granules, Pasture dry matter production results indicated that sulphuric PAPRs of 30% and SO% acidulation prepared from unground North Carolina rock were less effective than superphosphate. When reactive rocks were finely ground, 20% phosphoric acidulated product was generally as effective as superphosphate, and there was no apparent difference between the products prepared from North Carolina and a less reactive Khouribga rock. PAPR granules of unusually high crushing strength were inferior to supe!Jlhosphate.
Citation
Rajan, S.S S.; Ledgard, S F.; and Thorrold, B S., "Field Evaluation of Partially Acidulated Phosphate Rocks as Fertilizers for Permanent Pastures" (2024). IGC Proceedings (1993-2023). 14.
https://uknowledge.uky.edu/igc/1993/session40/14
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Field Evaluation of Partially Acidulated Phosphate Rocks as Fertilizers for Permanent Pastures
Seven field trials were conducted, in soils of volcanic origin, to evaluate the agronomic effectiveness of partially acidulated phosphate rocks (PAPRs), as influenced by type of acidulant, degree of acidulation, fineness of grinding and reactivity of phosphate rock, and hardness of the granules, Pasture dry matter production results indicated that sulphuric PAPRs of 30% and SO% acidulation prepared from unground North Carolina rock were less effective than superphosphate. When reactive rocks were finely ground, 20% phosphoric acidulated product was generally as effective as superphosphate, and there was no apparent difference between the products prepared from North Carolina and a less reactive Khouribga rock. PAPR granules of unusually high crushing strength were inferior to supe!Jlhosphate.
