1. Baker DE, Suhr NH (1982). Atomic absorption and flame emission spectrometry. In A.L. Page, R. H. Miller and D. R. Keeneys. (eds.) Methods of Soil Analysis, Part 2. Agronomy Monograph No. 9. 2nd edition. ASA-SSSA, WI, pp. 13-26.
2. Barnett GM (1994). Phosphorus forms in animal manure. Bioresource Technology 49(2):139-147.
3. Brechelt A (2004). Manejo Ecolgico del Suelo. Red de Accin en Plaguicidas y sus Alternativas para Amrica Latina (RAP-AL). Santiago del Chile, Chile (in Spanish).
4. Chen JH, Lin YH (2010). Sodium chloride causes variation in organic acids and proteins in tomato root. African Journal of Biotechnology. 9(48):8161-8167.
5. FAO (2016b). The State of World Fisheries and Aquaculture: Contributing to food security and nutrition for all. Food and Agriculture Organization of the United Nations (FAO), Rome.