Legislation and Quality Control of Phosphate Rocks for Direct Application

Author	Sen H. Chien
Date of acession	2024-03-15T07:35:04Z
Date of availability	2024-03-15T07:35:04Z
Date of issue	2004
Abstract	Legislation plays a crucial role in ensuring the quality and safety of phosphate rocks (PR) used for direct application as fertilizers. This chapter reviews the existing legislation in various countries regarding PR for direct application, focusing on total P2O5 content, solubility, and particle size. Examples from countries like Malaysia, Brazil, India, and New Zealand are discussed. Issues associated with legislation, such as the relevance of total P2O5 content to agronomic effectiveness and the effects of solubility, particle size, and free carbonates on PR reactivity, are explored. Guidelines for legislation on PR for direct application are proposed, emphasizing the importance of considering agronomic effectiveness, solubility measurement methods, particle size requirements, and other factors affecting PR quality.
Citation	Chien, S.H. 2004. “Chapter 11. Legislation and Quality Control of Phosphate Rocks for Direct Application,” IN Use of Phosphate Rocks for Sustainable Agriculture, F. Zapata and R.N. Roy (Eds.), pp. 117-123, FAO Fertilizer and Plant Nutrition Bulletin 13, Rome.
URL	https://hub.ifdc.org/handle/20.500.14297/2906
Language	en
Subject	Legislation
Subject	Fertilizers
Subject	Quality control
Title	Legislation and Quality Control of Phosphate Rocks for Direct Application
Type	Book chapter

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Name:: use_of_phosphate_rocks_for_sustainable_agricultur-wageningen_university_and_research_481326 (7)-139-145.pdf
Size:: 123.97 KB
Format:: Adobe Portable Document Format
Description:

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