Applicability of phosphate buffer extractable organic nitrogen as an indicator of available nitrogen in the sandy soils of the Sahel zone of Niger, West Africa

REFERENCES

• Alexander , M . 1961 . “ Mineralization and immobilization of nitrogen ” . In Introduction to Soil Microbiology , Edited by: Alexander , M . 248 – 292 . New York : John Wiley & Sons .
   Google Scholar
• Alkan , M , Demirbaş , Ö , Doˇan , M and Arslan , O . 2006 . Surface properties of bovine serum albumin-adsorbed oxides: adsorption, adsorption kinetics and electrokinetic properties . Microporous Mesoporous Mater , 96 : 331 – 340 .
   Web of Science ®Google Scholar
• Aoyama , M . 2006 . Properties of neutral phosphate buffer extractable organic matter in soils revealed using size exclusion chromatography and fractionation with polyvinylpyrrolidone . Soil Sci. Plant Nutr , 52 : 378 – 386 .
   Web of Science ®Google Scholar
• Appel , T and Mengel , K . 1990 . Importance of organic nitrogen fractions in sandy soils, obtained by electro-ultrafiltration or CaCl2extraction, for nitrogen mineralization and nitrogen uptake of rape . Biol. Fertil. Soils , 10 : 97 – 101 .
   Web of Science ®Google Scholar
• Appel , T and Mengel , K . 1993 . Nitrogen fractions in sandy soils in relation to plant nitrogen uptake and organic matter incorporation . Soil Biol. Biochem , 25 : 685 – 691 .
   Web of Science ®Google Scholar
• Bradford , MM . 1976 . A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding . Anal. Biochem , 72 : 248 – 254 .
   PubMed Web of Science ®Google Scholar
• Dunn , MJ . 1989 . “ Determination of total protein concentration ” . In Protein Purification Methods: a Practical Approach , Edited by: Harris , ELV and Angal , S . 10 – 16 . New York : Oxford University Press .
   Google Scholar
• Food and Agriculture Organization . 2006 . World Reference Base for Soil Resources 2006. A Framework for International Classification, Correlation and Communication , Rome : Food and Agriculture Organization .
   Google Scholar
• FoodAgriculture Organization2007FAO Statistical DatabasesAvailable from /(November 2007) http://www.fao.org (http://www.fao.org)
   Google Scholar
• Fujii , H , Ando , H , Sato , Y and Nakanishi , M . 1990 . Evaluation of chemical methods for estimation of soil nitrogen mineralization potential . Jpn. J. Soil Sci. Plant Nutr , 61 : 92 – 93 . (in Japanese)
   Google Scholar
• Gallagher , PA and Bartholomew , WV . 1964 . Comparison of nitrate production and other procedures in determining nitrogen availability in southeastern coastal plain soils . Agron. J , 56 : 179 – 184 .
   Google Scholar
• Gasser , JKR and Kalembasa , SJ . 1976 . Soil nitrogen IX. The effects of leys and organic manures on the available-N in clay and sandy soils . J. Soil Sci , 27 : 237 – 249 .
   Google Scholar
• Heinrigs , P and Perret , C . November 2006 . “ The ecologically vulnerable zone of Sahelian countries (PDF) ” . November , Available from URL: http://www.oecd.org/pages/. ECOWAS-SWAC/OECD, 2007
   Google Scholar
• Hiernaux , P and Ayantunde , A . 2004 . The Fakara: A Semi-arid Agro-ecosystem Under Stress; Report of Research Activities; First Phase (July 2002–June 2004) of the DMP-GEF Program (GEF/2711-02–4516) , Niamey : International Livestock Research Institute .
   Google Scholar
• Higuchi , M . 1981 . Characterization of immobilized nitrogen and organic nitrogen extracted with various buffer solutions . Jpn. J. Soil Sci. Plant Nutr , 52 : 481 – 489 . (in Japanese)
   Google Scholar
• Higuchi , M . 1982a . Characterization of soil organic nitrogen extracted with phosphate buffer . Jpn. J. Soil Sci. Plant Nutr , 53 : 1 – 5 . (in Japanese)
   Google Scholar
• Higuchi , M . 1982b . Estimation of available N in the soil under the long-term input of organic matter . Jpn. J. Soil Sci. Plant Nutr , 53 : 214 – 218 . (in Japanese)
   Google Scholar
• Hioki , M , Takahashi , S and Ito , S . 2003 . Applicability of UV absorption and Bradford methods to estimation of organic nitrogen extracted by neutral phosphate buffered solution . Res. Bull. Aichi Agric. Res. Ctr , 35 : 39 – 42 . (in Japanese with English summary)
   Google Scholar
• Houba , VJG , Novozamsky , I , Huybregts , AWM and Van Der Lee , JJ . 1986 . Comparison of soil extractions by 0.01 M CaCl2, by EUF and by some conventional extraction procedures . Plant Soil , 96 : 433 – 437 .
   Web of Science ®Google Scholar
• Jenkinson , DS . 1968 . Chemical test for potentially available nitrogen in soil . J. Sci. Food Agric , 19 : 160 – 168 .
   PubMed Web of Science ®Google Scholar
• Keeney , DR . 1982 . “ Nitrogen: availability indices ” . In Methods of Soil Analysis. Part 2: Chemical and Microbiological Properties , 2nd edn , Edited by: Page , AL , Miller , RH and Keeney , DR . 711 – 733 . Madison : American Society of Agronomy .
   Google Scholar
• Keeney , DR and Bremner , JM . 1966 . Comparison and evaluation of laboratory methods of obtaining an index of soil nitrogen availability . Agron. J , 58 : 498 – 503 .
   Web of Science ®Google Scholar
• Keeney , DR and Nelson , DW . 1982 . “ Nitrogen-inorganic forms ” . In Methods of Soil Analysis. Part 2: Chemical and Microbiological Properties , 2nd edn , Edited by: Page , AL , Miller , RH and Keeney , DR . 643 – 698 . Madison : American Society of Agronomy .
   Google Scholar
• Kretzschmar , R , Hesterberg , D and Sticher , H . 1997 . Effects of adsorbed humic acid on surface charge and flocculation of kaolinite . Soil Sci. Soc. Am. J , 61 : 101 – 108 .
   Web of Science ®Google Scholar
• Lathwell , DJ , Dubey , HD and Fox , RH . 1972 . Nitrogen-supplying power of some tropical soils of Puerto Rico and methods of its evaluation . Agron. J , 64 : 763 – 766 .
   Google Scholar
• Marumoto , T , Hurukawa , K , Yoshida , S , Kai , H , Yamada , Y and Harada , T . 1974 . Effects of microbial body and microbial cell wall on decomposable organic matter in soils (No. 1) . Jpn. J. Soil Sci. Plant Nutr , 45 : 23 – 28 . (in Japanese)
   Google Scholar
• Matsumoto , S , Ae , N and Yamagata , M . 2000a . Extraction of mineralizable organic nitrogen from soils by a neutral phosphate buffer solution . Soil Biol. Biochem , 32 : 1293 – 1299 .
   Web of Science ®Google Scholar
• Matsumoto , S , Ae , N and Yamagata , M . 2000b . The status and origin of available nitrogen in soils . Soil Sci. Plant Nutr , 46 : 139 – 149 .
   Web of Science ®Google Scholar
• Mengel , K . 1996 . Turnover of organic nitrogen in soils and its availability to crops . Plant Soil , 181 : 83 – 93 .
   Web of Science ®Google Scholar
• Miyazawa , K and Murayama , T . 2007 . Heterogeneity of neutral phosphate buffer extractable soil organic matter . Soil Sci. Plant Nutr , 53 : 1 – 6 .
   Web of Science ®Google Scholar
• Ogawa , Y , Kato , H and Ishikawa , M . 1989 . A simple analytical method for index of soil nitrogen availability by extracting in phosphate buffer solution . Jpn. J. Soil Sci. Plant Nutr , 60 : 160 – 163 . (in Japanese)
   Google Scholar
• Ogawa , Y , Yamane , T and Kato , H . 1992 . Application of simplified method to estimate the amount of available nitrogen in the soil . Agric. Hortic , 67 : 377 – 381 . (in Japanese)
   Google Scholar
• Ryan , JA , Sims , JL and Peaslee , DE . 1971 . Laboratory methods for estimating plant available nitrogen in soil . Agron. J , 63 : 48 – 51 .
   Web of Science ®Google Scholar
• Saito , M . 1988 . Estimation of nitrogen availability indices based on UV absorption of soil extracts . Jpn. J. Soil Sci. Plant Nutr , 59 : 493 – 495 . (in Japanese)
   Google Scholar
• Schlecht , E and Buerkert , A . 2004 . Organic inputs and farmers’ management strategies in millet fields of western Niger . Geoderma , 121 : 271 – 289 .
   Web of Science ®Google Scholar
• Schulten , HR and Schnizer , M . 1998 . The chemistry of soil organic nitrogen: a review . Biol. Fertil. Soils , 26 : 1 – 15 .
   Web of Science ®Google Scholar
• Sowden , FJ , Chen , Y and Schnitzer , M . 1977 . The nitrogen distribution in soils formed under widely differing climatic conditions . Geochim. Cosmochim. Acta , 41 : 1524 – 1526 .
   Web of Science ®Google Scholar
• Stanford , G and Demar , WH . 1970 . Extraction of soil organic nitrogen by autoclaving in water. 3. Diffusible ammonia, an index of soil nitrogen availability . Soil Sci , 109 : 190 – 196 .
   Google Scholar
• Thomas , JR , Heilman , MD and Lyles , L . 1974 . Predicting nitrogen fertilizer requirements after land leveling . Agron. J , 66 : 371 – 374 .
   Google Scholar
• Wezel , A and Haigis , J . 2002 . Fallow cultivation system and farmers’ resource management in Niger, West Africa . Land Degrad. Develop , 13 : 221 – 231 .
   Google Scholar
• Yanai , M , Uwasawa , M , Konno , T and Shimizu , Y . 1998a . Relationship between amounts of extracted soil nitrogen with phosphate-buffered solution and those of available nitrogen released under waterlogged conditions: efficiency of dividing soil samples into several groups by taxonomical group, soil chemical properties, and history of soil management . Jpn. J. Soil Sci. Plant Nutr , 69 : 365 – 370 . (in Japanese with English summary)
   Google Scholar
• Yanai , M , Uwasawa , M , Konno , T and Shimizu , Y . 1998b . Relationship between absorbance of soil-extracted solution with phosphate-buffered solution and amount of available soil nitrogen released under waterlogged conditions . Jpn. J. Soil Sci. Plant Nutr , 69 : 371 – 378 . (in Japanese with English summary)
   Google Scholar