Descrizione fisica: xx, 148 p. : ill. ; 30 cm.
Note generali: FAO fertilizer and plant nutrition bulletin ; 13
"TC/M/Y5053E/1/1.04/1600"--P. [4] of cover.
Includes bibliographical references (p. [127]-148).
Introduction -- World phosphate deposits -- Characterization of phosphate rocks -- Evaluation of phosphate rocks for direct application -- Factors affecting the agronomic effectiveness of phosphate rocks, with a case-study analysis -- Soil testing for phosphate rock application -- Decision-support systems for the use of phosphate rocks -- Secondary nutrients, micronutrients, liming effect and hazardous elements associated with phosphate rock use -- Ways of improving the agronomic effectiveness of
phosphate rocks -- Economic factors in the adoption and utilization of phosphate rocks -- Legislation and quality control of phosphate rocks for direct application -- Epilogue.
Extensive research on the agronomic potential and actual effectiveness of phosphate rocks (PRs) as sources of phosphorus has been carried out in Africa, Asia, Latin America and elsewhere. A wealth of information is available, but it is scattered among meeting proceedings, technical reports and scientific and other publications. This bulletin gives comprehensive coverage of the key topics regarding the utilization of PRs in agriculture, including the latest information on PR research, and provides guidelines for the direct application of PR (DAPR) to the acid soils of the tropics and subtropics. The selected topics include: world PR deposits; characterization of PR sources; evaluation methodologies of PR sources for direct application; analysis of the biophysical and farming factors that affect the agronomic effectiveness of PR sources, together with an analysis of the socio-economic factors that influence the use and adoption of PR technologies as a capital investment to trigger
agricultural intensification; development and use of decision-support systems for DAPR; soil P testing for PR application; available technologies for enhancing the agronomic effectiveness of indigenous PR sources; environmental issues; legislation guidelines; and future research areas and priorities.--Publisher's description.
Available both in print and online.
ISBN: 9251050309
Serie: FAO fertilizer and plant nutrition bulletin ; 13
Altri nomi: Roy, R. N.
Food and Agriculture Organization of the United Nations. Land and Water Development Division
International Atomic Energy Agency
Soggetti: Phosphate rock
Phosphatic fertilizers
Phosphorus in agriculture
Classificazione: 631.85
