References
- Cantarella , H. and de Abreu , M. F. 2004 . “ Evaluation of the performance of laboratories in 2003 ” . In 19th Annual Meeting of IAC Soil Proficiency Testing Program for Laboratories of Soil Analysis Campinas, , Brazil : Instituto Agronomico . (in Portuguese)
- Cantarella , H. , van Raij , B. and Quaggio , J. A. 1998 . Soil and plant analysis for lime and fertilizer recommendations in Brazil . Communications in Soil Science and Plant Analysis , 29 : 1691 – 1706 .
- Cools , N. , Delanote , V. , Scheldeman , X. , Quataert , P. , de Vos , B. and Roskams , P. 2004 . Quality assurance and quality control in forest soil analyses: A comparison between European soil laboratories . Accreditation and Quality Assurance , 9 : 688 – 694 .
- Klesta , E. J. and Bartz , J. K. 1996 . “ Quality assurance and quality control ” . In Methods of Soil Analysis, Part 3: Chemical Methods Edited by: Bartels , J. M. and Bigham , J. M. 18 – 48 . Madison, Wisconsin : Soil Science Society of America .
- Peck , T. R. and Soltanpour , P. N. 1990 . “ The principles of soil testing ” . In Soil Testing and Plant Analysis , 3rd ed. Edited by: Westerman , R. L. 1 – 9 . Madison, Wisconsin : Soil Science Society of America .
- Peltovuori , T. 1999 . Precision of commercial soil testing practice for phosphorus fertilizer recommendations in Finland . Agricultural and Food Science in Finland , 8 : 299 – 308 .
- Quaggio , J. A. , Cantarella , H. and van Raij , B. 1994 . Evolution of the analytical quality of soil testing laboratories integrated in a sample exchange program . Communications in Soil Science and Plant Analysis , 25 : 1007 – 1014 .
- Quaggio , J. A. , Cantarella , H. and van Raij , B. 1998 . Phosphorus and potassium soil test and nitrogen leaf analysis as a base for citrus fertilization . Nutrient Cycling in Agroecosystems , 52 : 67 – 74 .
- Raij , B. van , Feitosa , C. T. , Cantarella , H. , Camargo , A. P. , Dechen , A. R. , Alves , S. , de Sordi , G. , Veiga , A. A. , Petinelli , A. and Nery , C. 1981 . Soil analysis to discriminate corn response to fertilizer . Bragantia , 40 : 50 – 75 . (in Portuguese)
- Raij , B. van , Feitosa , C. T. and Quaggio , J. A. 1983 . “ Soil testing as a basis of phosphorus recommendations for maize ” . In Proceedings of the International Congress on Phosphorus Compounds 297 – 307 . Brussels : Institut Mondial du Phosphate (IMPHOS) .
- Raij , B.van , Cantarella , H. , Quaggio , J. A. and Furlani , A. M.C. 1996 . Recommendations of Fertilizer and Lime for the State of São Paulo Campinas, , Brazil : Instituto Agronomico . (in Portuguese)
- Raij , B.van , Cantarella , H. and Quaggio , J. A. 1994 . Soil testing and plant analysis in Brazil . Communications in Soil Science Plant Analysis , 25 : 739 – 751 .
- Raij , B. van , Quaggio , J. A. and da Silva , N. M. 1986 . Extraction of phosphorus, potassium, calcium and magnesium from soils by an ion‐exchange resin procedure . Communications in Soil Science and Plant Analysis , 17 : 544 – 566 .
- Raij , B. van , de Andrade , J. C. , Cantarella , H. and Quaggio , J. A. 2001 . Chemical Analysis for Evaluation of the Fertility of Tropical Soils Campinas, , Brazil : Instituto Agronomico . (in Portuguese)
- Rayment , G. E. 1993 . Soil analysis—a review . Australian Journal of Experimental Agriculture , 33 : 1015 – 1028 .
- Wiethölter , S. 1997 . “ Quality control of soil analysis of ROLAS and its effects on lime and fertilizer recommendations ” . In 29th Annual Meeting of the Official Network of Soil and Plant Analysis Laboratories of the States of Rio G. do Sul and Santa Catarina Guaíba, , Brazil : ROLAS . (in Portuguese)
- Wolf , A. M. , Jones , J. B. and Hood , T. 1996 . Proficiency testing for improving analytical performance in soil testing laboratories: A summary of results from the council's soil and plant analysis proficiency testing programs . Communications in Soil Science and Plant Analysis , 27 : 1611 – 1622 .