Soil test calibration studies for formulation of phosphorus fertilizer recommendations for maize in Morogoro district, Tanzania. I. evaluation of soil test methods

References

• Allen , E.R. , Johnson , G.V. and Unruh , L.G. 1994 . “ Current approaches to soil testing methods: Problems and solutions ” . In Soil Testing: Prospects for Improving Nutrient Recommendations , Edited by: Havlin , J.I and Jacobsen , J.S. 203 – 220 . Madison , WI : Soil Science Society of America . SSSA Special Publication No. 40
   Google Scholar
• Barber , S.A. 1984 . “ Soil Nutrient Bioavailability: A Mechanistic Approach ” . 201 – 225 . New York , NY : John Wiley and Sons .
   Google Scholar
• Blancher , R.W. and Cardwell , A.C. 1964 . Phosphorus uptake by plants and readily extractable P in soils . Agron. J. , 56 : 218 – 221 .
   Google Scholar
• Bray , R.H. and Kurtz , L.T. 1945 . Determination of total, organic and available forms of phosphorus in soils . Soil Sci. , 59 : 39 – 54 .
   Web of Science ®Google Scholar
• Bremner , J.M. and Mulvaney , C.S. 1982 . “ Total nitrogen ” . In Methods of Soil Analysis. Part 2. Chemical and Microbiolgical Properties , Agronomy 9 Edited by: Page , A.L. 610 – 616 . Madison , WI : American Society of Agronomy .
   Google Scholar
• Cate , R.B. Jr. and Nelson , L.A. 1965 . A rapid method for correlation of soil test analysis with plant response data . North Carolina State Univ. Int. Soil Testing Series Tech. Bull. ,
   Google Scholar
• Cate , R.B. Jr. and Nelson , L.A. 1971 . A simple statistical procedure for partitioning soil test correlation data into two classes . Soil Sci. Soc. Am. Proc. , 35 : 658 – 659 .
   Web of Science ®Google Scholar
• Chapman , H.D. 1965 . “ Cation exchange capacity ” . In Methods of Soil Analysis , Agronomy 9 Edited by: Black , C.A. , Evans , D.D. , White , J.L. , Ensminger , E.E. and Clark , P.E. 891 – 901 . Madison , WI : American Society of Agronomy .
   Google Scholar
• Day , P.R. 1965 . “ Particle fraction and particle size analysis ” . In Methods of Soil Analysis , Agronomy 9 Edited by: Black , C.A. , Evans , D.D. , White , J.L. , Ensminger , E.E. and Clark , P.E. 562 – 567 . Madison , WI : American Society of Agronomy . Part 1
   Google Scholar
• Kamprath , E.J. and Watson , M.E. 1980 . “ Conventional soil and tissue tests for assessing the phosphorus status of soils ” . In Role of Phosphorus in Agriculture , Edited by: Khasawneh , F.E. , Sample , F.E. and Kamprath , E.J. 433 – 469 . Madison , WI : American Society of Agronomy, Crop Science Society of America .
   Google Scholar
• Labhsetwar , V.K. and Soltanpour , P.N. 1985 . A comparison of NH4HCC3‐DTPA, NH4HCO3‐, and NA2DTA soil tests for phosphours . Soil Sci. Soc. Am. J. , 49 : 1437 – 1440 .
   Web of Science ®Google Scholar
• Mehlich , A. 1984 . Mehlich 3 Soil test extractant: A modification of Mehlich 2 extractant . Commun. Soil Sci. Plant Anal. , 15 : 1409 – 1416 .
   Web of Science ®Google Scholar
• Mnkeni , P.N.S. A review of soil fertility and fertilizer use and research recommendations in Tanzania . Proceedings of the East and Southern African Fertilizer Management and Evaluation Network Workshop . Edited by: Sali , H. and Williams , L.B. pp. 161 – 195 . Muscle Shoals , AL : International Fertilizer Development Centre .
   Google Scholar
• Muriuki , S.K. and Barber , R.G. Studies on the measurement of available P in some Kenyan soils . Proceedings of the 4th Annual General Meeting of the Soil Science Society of East Africa . October 27–28 , Tanzania. Arusha .
   Google Scholar
• Nandra , S.S. 1974 . Evaluation of soil test methods for the estimation of available phosphorus in some Tanzanian soils. A greenhouse study . East Afr. Agric. For. J. , 40 : 24 – 30 .
   Google Scholar
• Nelson , D.W. and Sommers , L.E. 1982 . “ Total carbon, prganic carbon and organic matter ” . In Methods of Soil Analysis , Edited by: Page , A.L. 570 – 571 . Madison , WI : American Society of Agronomy .
   Google Scholar
• Nelson , L. A. and Anderson , R.L. 1977 . Partioning of Soil Test: Crop Response Probability . Am. Soc. Agron. Spec. Publ. , 29 : 18 – 38 .
   Google Scholar
• Ogot , P.O. 1970 . Evaluation of phosphorus soil test methods by greenhouse studies and laboratory tests . East Afr. Agric. For. J. , 35 : 336 – 339 .
   Google Scholar
• Olsen , S.R. and Sommers , L.E. 1982 . “ Phosphorus ” . In Methods of Soil Analysis , Chemical and Microbiological Properties Edited by: Page , A.L. 403 – 430 . Madison , WI : American Society of Agronomy . Part II
   Google Scholar
• Olsen , S.R. , Cole , C.V. and Watanabe , F.S. 1954 . Estimation of available phosphorus in soils by extraction with sodium bicarbonate , Washington, DC : U.S. Government Printing Office . U.S. Dept. Agric. Circ. 939
   Google Scholar
• Singh , B.R. , Uriyo , A.P. , Mnkeni , P.N.S. and Msaky , J.J.T. Evaluation of indices of N and P availability for the soils of Morogoro, Tanzania . Proc. Clamatrops (Conference on the Classification and Management of Tropical Soils) . Kuala Lumpur , Malaysia. pp. 273 – 278 .
   Google Scholar
• Smyth , T.J. and Cravo , M.S. 1990 . Critical phosphorus levels for com and cowpea in a Brazilian Amazon Oxisols . Agron. J. , 82 : 309 – 312 .
   Web of Science ®Google Scholar
• Soil Survey Staff . 1990 . Keys to soil taxonomy. Agency for International Development, United States Department of Agriculture Soil Management Support Services , Tech. Monograph No. 19 Blacksburg , VA : Virginia Polytechnique Institute and the State University .
   Google Scholar
• Soltanpour , P.N. and Schwab , A.P. 1977 . A new soil test for simultaneous extraction of macro‐and micronutrients in alkaline soils . Commun. Soil Sci. Plant Anal. , 8 : 195 – 207 .
   Web of Science ®Google Scholar
• Steel , R.G.D. and Torrie , J.H. 1984 . Principles and procedures of statistics. A biometrical approach , New York , NY : McGraw Hill Book Co. .
   Google Scholar
• Zubriski , J.C. 1971 . Relationship between forms of soil phosphorus, some indices of phosphorus availability and growth of Sudan grass in greenhouse trials . Agron. J. , 63 : 421 – 425 .
   Web of Science ®Google Scholar
• Corresponding author.
   Google Scholar