[Alef K., Nannipieri P. 1995. Enzyme activities. In: Methods in applied Soil Microbiology and Biochemistry (eds.: K. Alef, P. Nannipieri). Academic Press, London.]Search in Google Scholar
[Bandick A.K., Dick R.P. 1999. Field management effects on soil enzyme activities. Soil Biology andBiochemistry, 31, 1471- 1479.]Search in Google Scholar
[Beck T. 1984. Methods and applications of soil microbiological analyses at the Landsensanstalt fur Bodenkultur und Pfanzenban (LBB). In: Munich for the determination of some aspects of soil fertility. Fifth Symposium on Soil Biology (eds.: M.P. Nemes, S. Kiss, P. Papacostea, G. Stefanic, M. Rusan). Roman National Society of Soil Science, Bucharest, 13- 20.]Search in Google Scholar
[Brożek S. 2007. Soil quality numerical valorisation - a tool in forest site diagnosis (in Polish with English summary). Sylwan, 2, 35- 42.]Search in Google Scholar
[Bruchwald A., Kliczkowska A. 2000. Forming of pine stand quality class in Poland. In: Spatial variation in scots pine growth (in Polish). Fundation Development SGGW, 30−41.]Search in Google Scholar
[Bruchwald A., Dudzińska M., Wirowski M. 1996. The model of top height growth of oak stands (in Polish with English summary). Sylwan, 10, 35- 44.]Search in Google Scholar
[Carmean W. H. 1975. Forest site quality evaluation in the United States. Advances in Agronomy, 27, 209- 269.]Search in Google Scholar
[Dick R.P. 1994. Soil enzyme activities as indicators of soil quality. In: Defining soil quality for a sustainable environment (ed.: J.W. Doran). Soil Science Society of America, Special Publication 35. SSSAASA, Madison, 107- 124.]Search in Google Scholar
[Eivazi F., Tabatabai M.A. 1990. Factors affecting glucosidase and galactosidase activity in soils. Soil Biologyand Biochemistry, 22, 891- 897.]Search in Google Scholar
[Ford D.E. 1983. What do we need to know about forest productivity and how can we measure it? In: IUFRO Symposium on Forest Site and Continuous Productivity (eds.: R. Ballard, S.P. Gessel). USDA Forest Service, General Technical Report, PNW-163, 2- 12.]Search in Google Scholar
[Gil-Sotres F., Trasar-Cepeda C., Leiros M.C., Seoane S. 2005. Different approaches to evaluating soil quality using biochemical properties. Soil Biology andBiochemistry, 37, 877- 887.]Search in Google Scholar
[Haziev F.H. 1976. Fermentativnaâ aktivnost počv. Izd. Nauka, Moskwa.]Search in Google Scholar
[Januszek K. 1999. The enzymatic activity of selected forest soils of southern Polish in the light of field studies and laboratory (in Polish with English summary). Scientific books, AR Krakow, Books 250.]Search in Google Scholar
[Januszek K. 2011. The enzyme activity of the forest soils of southern Poland as a measure of soil quality. EJPAU, 14 (2), #01.]Search in Google Scholar
[Kandeler E., Eder G. 1993. Effect of cattle slurry in grassland on microbial biomass and on activities of various enzymes. Biology and Fertility of Soils, 16, 249- 254.]Search in Google Scholar
[Koper J., Piotrowska A. 2003. Application of biochemical index to define soil fertility depending on varied organic and mineral fertilization. EJPAU, 6 (1), #06.]Search in Google Scholar
[Kucharski J. 1997. Relationships between the enzymes activity and soil fertility. In: Microbes in the environment, occurrence, activity and importance (ed.: W. Barabasz). AR Krakow, 327- 347;]Search in Google Scholar
[Lasota J. 2005. Biochemical indicator of mountain forest soil fertility. Soil Science Annual, 56, 42- 52.]Search in Google Scholar
[Mysków W., Stachyra A., Zięba S., Masiak D. 1996. The biological activity of soil as an indicator of fertility. Soil Science Annual, 47, 89- 99.]Search in Google Scholar
[Nannipieri P. 1994. The potential use of soil enzymes as indicators of productivity, sustainability and pollution. In: Soil biota: management in sus tainable farming systems (eds.: C.E. Pankhurst, B.M. Doube, V.V.S.R. Gupta, P.R. Grace). CSIRO, Melbourne, 293- 355.]Search in Google Scholar
[Nannipieri P., Grego S., Ceccanti B. 1990. Ecological significance of the biological activity in soil. In: Soil Biochemistry (eds.: G.M. Bollag, G. Stotzky). Marcel Dekker, New York, 6, 293- 355.]Search in Google Scholar
[Nannipieri P., Kandeler E., Ruggiero P. 2002. Enzyme activities and microbiological and biochemical processes in soil. In: Enzymes in the Environment (eds.: R.G. Burns, R.P. Dick). Marcel Dekker, New York, 1- 34.]Search in Google Scholar
[Nortcliff S. 2002. Standardisation of soil quality attributes. Agriculture, Ecosystems and Environment, 88, 161- 168.]Search in Google Scholar
[Olszowska G., Zwoliński J., Matuszczyk I.,Syrek D., Zwolińska B., Pawlak U., Kwapis Z., Dudzińska M. 2005. The use of biological activity studies to determine a soil fertility indicator in pine stands on fresh coniferous and on mixed fresh coniferous forest sites (in Polish with English summary). LeśnePrace Badawcze, 3, 17- 37.]Search in Google Scholar
[Olszowska G., Zwoliński J., Matuszczyk I., Syrek D. 2007. Application of biochemical soils parameters in typological diagnostics of forest sites (in Polish with English summary). Leśne Prace Badawcze, 4, 83- 105.]Search in Google Scholar
[Pascual J.A., García C., Hernandez T. 1999. Lasting microbiological and biochemical effects of the addition of municipal solid waste to an arid soil. Biologyand Fertility of Soils, 30, 1- 6.]Search in Google Scholar
[Puglisi E., Del Re A.A.M., Rao M.A., Gianfreda L. 2006. Development and validation ofnumerical indexes integrating enzymatic activities of soils. SoilBiology and Biochemistry, 38, 1673- 1681.]Search in Google Scholar
[Rodriguez-Loinaz G. R., Onaindia M., Amezaga I. 2007. Relationship between vegetation diversity and soil functional diversity in native mixed-oak forests. Soil Biology and Biochemistry, 40, 49- 60.]Search in Google Scholar
[Saviozzi A., Levi-Minzi R., Cardelli R., Riffaldi R. 2001. A comparison of soil quality in adjacent cultivated forest and native grassland soils. Plant andSoil, 233, 251- 259.]Search in Google Scholar
[Schoenholtz S.H., Van Miegroet H., Burger J.A. 2000. A review of physical and chemical properties as indicators of forest soil quality: challenges and opportunities. Forest Ecology and Management, 138, 335- 356.]Search in Google Scholar
[Sinsabaugh R.L., Moorhead D.L., Linkins A.E. 1994. The enzymatic basis of plant litter decomposition: emergence of an ecological process. Applied SoilEcology, 1, 97- 111.]Search in Google Scholar
[Skinner M. F., Paynt W., Lowe A. T., Kimberley M.O., Graham J.D. 1999. Do genetic improvements in radiata pine seedlings confound their use as indicators of change in soil quality? Forest Ecology andManagement, 122, 107- 112.]Search in Google Scholar
[Skujinš J.J. 1978. History of abiontic soil enzyme research. In: Soil enzymes (ed.: R.G. Burns). Academic Press, London, 1- 49.]Search in Google Scholar
[Stefanic G., Eliade G., Chirnogeanu I. 1984. Researches concerning a biological index of soil fertility. In: Fifth symposium on soil biology (eds.: M.P. Nemes, S. Kiss, P. Papacostea, C. Stefanic, M. Rusam). Romanian National Society of soil Science, Bucharest, 35- 45.]Search in Google Scholar
[Trasar-Cepeda C., Leirós C., Gil-Sotres F. 2008. Hydrolytic enzyme activities in agricultural and forest soils. Some implications for their use as indicators of soil quality. Soil Biology Biochemistry, 40, 2146- 2155.]Search in Google Scholar
[Trasar-Cepeda C., Leiro´s M.C., Gil-Sotres F., Seoane S. 1998. Towards a biochemical quality index for soils: an expression relating several biological and biochemical properties. Biology and Fertility ofSoils, 26, 100- 106.]Search in Google Scholar
[Trasar-Cepeda C., Leiro´s M.C., Seoane S., Gil-Sotres F. 2000. Limitations of soil enzymes as indicators of soil pollution. Soil Biology and Biochemistry, 32, 1867- 1875.]Search in Google Scholar
[Turner B.L., Hopkins D.W., Haygarth P.M., Ostle N. 2002. β-Glucosidase activity in pasture soils. AppliedSoil Ecology, 20 (2), 157- 162.]Search in Google Scholar
[Yakovchenko V.I., Sikora L.J., Rauffman D.D. 1996. A biologically based indicator of soil quality. Biologyand Fertility of Soils, 21, 245- 251.]Search in Google Scholar
[Zornoza R., Mataix-Solera J., Guerrero C., Arcenegui V., García-Orenes F., Mataix-Beneyto J., Morugán A. 2007. Evaluation of soil quality using multiple lineal regressions based on physical, chemical and biochemical properties. Science of the Total Environment, 378, 233- 237.]Search in Google Scholar