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Welch, J.E. and L.J. Lund. 1989. Zinc movement in sewage-sludge treated soil as influenced
by soil properties, irrigation water quality, and soil moisture level. Soil Sci., 147:208-
214.
Widowati, W., A. Sastiono, and R.J. Rumampuk. 2008. Efek Toksik Logam: Pencegahan dan
Penanggulangan Pencemaran. Penerbit Andi, Yogyakarta. (In Indonesian).
Wiharso, D. 1998. Prediksi suhu tanah dari suhu udara guna menentukan regim temperatur
tanah (Studi kasus daerah Terbanggi Besar Lampung Tengah). J. Tanah Trop., 6:165-
170. (In Indonesian).
Witter, E., W.E. Giller, and S.P. McGrath. 1994. Long-term effects of metal contamination
on soil microorganisms. Soil Biol. Biochem., 26:421-422.
Workman, S.M. and W.L. Lindsay. 1990. Estimating divalent cadmium activities measured in
arid-zone soils using competitive chelation. Soil Sci. Soc. Am. J., 54:987-993.
Wu, Y., L. Lu, B. Wang, X. Lin, J. Zhu, Z. Cai, X. Yan, and Z. Jia. 2011. Long-term field
fertilization significantly alters community structure of ammonia-oxidizing bacteria
rather than archaea in a paddy soil. Soil Sci. Soc. Am. J., 75:1431-1439.
Wu, X.D., L. Zhao, H.B. Fang, J. Chen, Q.Q. Pang, Z.W. Wang, M.J. Chen, and Y.J. Ding. 2012.
Soil enzyme activities in permafrost regions of the western Qinghai-Tibetan Plateau.
Soil Sci. Soc. Am. J., 76:1280-1289.
Xie, R.J. and A.F. McKenzie. 1990. Zinc sorption, desorption, and fractions in three
autoclaved soils treated with pyrophosphate. Soil Sci. Soc. Am. J., 54:71-77.
Yang, J., R.W. Blanchar, R.D. Hammer, and A.L. Thomson. 1996. Soybean growth and
rhizosphere pH as influenced by A Horizon thickness. Soil Sci. Soc. Am. J., 60:1901-
1907.
Yeh, C.-Y., H.-Y. Chiou, R.-Y. Chen, K.-H. Yeh, W.-L. Jeng, and B.-C. Han. 1996. Monitoring
lead pollution near a storage battery recycling plant in Taiwan Republic of China.
Arch. Environ. Contam. Toxicol., 30:227-234.
Yusnaini, A. Niswati, M.A.S. Arif, M. Matsumoto, and M. Nonaka. 2002. Earthworm
population in deforested lands in hilly area of Sumberjaya West Lampung. J. Tanah
Trop., 14:141-146
Yusnaini, S., A.K. Salam, and M. Nonaka. 2007. Activities of soil enzymes in corn field
enriched with manure. J. ISSAAS 13(1):18-25.
Zhang, H., K.H. Hartge, and H. Ringe. 1997. Effectiveness of organic matter incorporation in
reducing soil compactibility. Soil Sci. Soc. Am. J., 61:239-245.
Zhao, X. and L. Zhou. 1991. Effect of the urease inhibitor, hydroquinone on soil enzyme
activities. Soil Biol. Biochem., 23(11):1089-1091.
Zhou, X., Z. He, Z. Liang, P.J. Stoffella, J. Fan, Y. Yang, and C.A. Powell. 2011. Long-term use
of copper-containing fungicide affects microbial properties of citrus grove soils. Soil
Sci. Soc. Am. J., 75:898-906.

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