Abdel Karim Hassan Awad ELKARIM, Sadık USTA

Ankara-Polatlı Tarım İşletmesi topraklarında yarayışlı azotun belirlenmesinde kullanılabilecek uygun kimyasal ekstraksiyon yöntemlerinin saptanması

In pursuit of evaluating the suitability of methods for determining the ability of soils to supply available nitrogen under different soil conditions, two biological aerobic and anaerobic incubation procedures and six chemical extraction methods were applied to 31 samples of soil collected from the Central Anatolian area. The selected area for the study represents the criteria of arid and semi-arid regions. Statistically significant correlation coefficients were found between the biological methods and the five chemical methods that were evaluated out of the six. Only the alkaline KMn$O_{4}$ method did not give a significant correlation cofficient. The results of the phosphate-borate buffer method gave the highest correlation with the results of the biological methods. Although the method of hot 2 M KCl had a good correlation with biological methods, the r values obtained by this method were lower than those that obtained by the phosphate-borate buffer method. When the six chemical extraction methods were compared with each other, it was seen that the highest correlations were established between the acid KMn$O_{4}$ method and each of the total hydrolyzable ammonium and total hydrolyzable nitrogen methods. However, the lowest relations were found between the results obtained by the alkaline KMn$O_{4}$ method and the other chemical extraction methods. It was concluded that phosphate-borate buffer and acid KMn$O_{4}$ methods were the most suitable for Central Anatolian soils and other similar soil types. The total hydrolyzable $NH_{4}$-N value gave a high correlation with the biological method.

Evaluation of some chemical extraction methods used as indices of soil nitrogen availabilty in Polatlı State Farm soils in Ankara province

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Bremner, J.M. 1965a. Inorganic forms of nitrogen. (Eds. C.A. Black et al.) Methods of Soil Analysis, Part 2. American Society of Agronomy Am. Soc. of Agron, Madison, Wisconsin, USA, pp. 1179-1206.
Bremner, J. M. 1965b. Nitrogen availability indexes. (Eds. C.A. Black et al.) Methods of Soil Analysis, Part 2. American Society of Agronomy Am. Soc. of Agron, Madison, Wisconsin, USA, pp. 1324-1345.
Cornforth, I.W. and D. Walmsley. 1971. Methods of measuring available nutrients in West Indian soils. Plant Soil 35:389-399.
Day, P.R. 1965. Particle fractionation and particle size analysis. (Eds. C.A. Black et al.) Methods of Soil Analysis, Part 2. American Society of Agronomy Am. Soc. of Agron, Madison, Wisconsin, USA, pp. 546-466.
Gezgin, S. and S. Karakaplan. 1994. Konya-Çumra Ovası topraklarında bitkiye faydalı azot miktarının tayininde kullanılabilecek yöntemler üzerinde bir araştırma. Tr. J. of Agric. Fores., 18: 235-241.
Gianello, C. and J.M. Bremner. 1986. Comparison of chemical methods of assessing potentially available organic nitrogen in soil. Commun. Soil Sci. Plant Anal. 17(2):215-236.
Jalil, A., C.A.I. Champel, J. Schoenau, J.L. Henry, Y.W. Jame and G. P. Lafond. 1996. Assessment of two chemical extraction methods as indices of available nitrogen. Soil Sci. Soc. Am. J. 60: 1954-1960.
Jenkinson, D.S. 1968. Chemical tests for potentially available nitrogen in soil. J. Sci. Food Agric. 19:160-168.
Kacar, B. and A. Arat, 1973. Gediz Ovası topraklarında faydalanılabilir azot miktarının tayininde kullanılacak metodlar üzerinde bir araştırma. TÜBİTAK IV. Bilim Kongresi 5-8 Kasım, Ankara, p.1-16,
Keeney, D. R. and J. M. Bremner. 1967. Determination of isotope ratio analysis of different forms of nitrogen in soils. VI. Mineralizable nitrogen. Soil Sci. Soc. Am. Proc.31: 34-39.
Keeney, D.R. 1982. Nitrogen Availability Indices. In: Methods of Soil Analysis, Part 2: Chemical and Microbiological Properties. (Eds. C. A. Black et al.) American Society of Agronomy Madison,Wisconsin, USA. pp:711-733.
Korkmaz, A. and C. Gülser. 1995. Samsun yöresi topraklarının azot sağlama kapasitelerinin NaHCO3 ekstraktında UV absorbans yöntemiyle belirlenmesi. Tr. J. Agric. Fores. 19: 319-326.
Nelson, D.W. and L.E. Sommers. 1982. Total Carbon, Organic Carbon and Organic Matter. In: Methods of Soil Analysis, Part 2 Chemical and Microbiological Properties (A.L. Page, ed) p 539-580. Soil Sci. Soc. Am. Inc., 677 South Segoe Road, Madison, Wisconsin 53711 USA.
Nelson, R.E. 1982. Carbonate and Gypsum. In: Methods of Soil Analysis, Part 2, Chemical and Microbiological Properties (Ed. A.L. Page,) Soil Sci. Soc. Am. Inc., 677 South Segoe Road, Madison, Wisconsin 53711 USA. pp 181-197.
Osborne, G.F. and R. R. Storrier. 1976. Influence of different sources of N fertilizer on the value of soil N tests. Aust. J. Exp. Agric. Anim. Husb. 16:881-886.
Smith, K.A. and S. Li. 1993. Estimation of potentially mineralizable nitrogen in soil by KCI extraction. I. Comparison with pot experiments. Plant Soil. 157: 167-174.
Stanford, G. 1978. Evaluation of ammonium release by alkaline permanganate as an index of soil nitrogen availability. Soil Sci. 126:244-253.
Stanford, G. and S.J. Smith. 1978. Oxidative release of potentially mineralizable soil nitrogen by acid permanganate extraction. Soil Sci. 126: 210-218.
Stevenson F.J. 1982. Nitrogen-Organic forms. (Eds. C.A. Black et al.). Methods of Soil Analysis, Part 2. Agronomy 10: American Society of Agronomy Madison,Wisconsin, USA. pp: 625-641.
Waring, S.A. and J.M. Bremner. 1964. Ammonium production in soil under waterlogged conditions as an index of N availability. Nature 201: 951-952.