Page 180 - Ilmu Tanah

The Chemistry and Fertility of Soils under Tropical Weeds 167

Montiel-Rozas, M.M., E. Madejon, and P. Madejon.. 2016. Effect of heavy metals and
organic matter on root exudates (low molecular weight organic acids) of herbaceous
species: An assessment in sand and soil conditions under different levels of
contamination. Environ. Pollut., 216:273-281.
Moyo, C.C., D.E. Kissel, and M.L. Cabrera. 1989. Temperature effects on soil urease activity.
Soil Biol. Biochem., 21:935-938.
Najafi-Ghiri, M. and H.R. Jabari. 2013. Effect of soil minerals on potassium release from soil
fractions by different extractants. J. Arid Land Res. Manag., 27:111-127.
Nakas, J.P., W.D. Gould, and D.A. Klein. 1987. Origin and expression of phospatase activity
in a semi-arid grassland soil. Soil Biol. Biochem., 19(1):13-18.
Nannipieri, P., B.Ceccanti, S. Cervelli, and E. Matarese. 1980. Extraction of phosphatase,
urease, protease, organic carbon, and nitrogen from soil. Soil Sci. Soc. Am. J., 44:1011-
1016.
Naseby, D.C. and J.M. Lynch. 1997. Rhizosphere soil enzymes as indicators of pertubations
caused by enzyme substrate addition and innoculation of a genetically modified strain
of Pseudomonas fluorescens on wheat seed. Soil Biol. Biochem., 29(9-10):1353-1362.
Nasution, U. 1986. Origin and range of enzymes in soils. pp.51-80. In R.G. Burns (Ed.). Soil
Enzymes. Academic Press, London, New York, San Fransisco.
Navas, M.L. 1991. Using plant population biology in weed research: a strategy to improve
weed management. Weed Res., 31: 171-179.
Nicholson, F.A., K.C. Jones, and A.E. Johnston. 1994. Effect of phosphate fertilizers and
atmospheric deposition on long-term changes in the cadmium content of soil and crops.
Environ. Sci. Technol., 28:2170-2175.
Nihorimbere, V., M. Ongena, M. Smargiassi, and P. Thonart. 2011. Beneficial effect of the
rizhospehere microbial community for plant growth and health. Biotechnologie,
Agronomie, Societe et Environnement, 15:327-337.
Oki, Y., T. Adachi, and M. Senge. 1999. Sustainable management of hilly areas by plant
cover. Proc. Int. Symp. ‘Can Biological Production Harmonize with Environment?’ –
Reports from Research Sites in Asia – Asian National Environmental Science Center, The
University of Tokyo, Oct 19-20, 1999, Tokyo. pp.215-218.
Ontia, N. 2018. Pengaruh Gulma Arachis pintoi dan Penissetum purpureum terhadap pH, C-
Organik, dan K-Tersedia tanah 20 tahun setelah tercemar logam berat dan dikapur.
B.S. Thesis. Faculty of Agricuture University of Lampung. Bandar Lampung. (In
Indonesian).
Osunkoya, O.O., F.E. Othman, and R.S. Kahar. 2005. Growth and competition between
seedlings of an invasive plantation tree, Acacia mangium, and those of a native Borneo
heath-forest species, Melastoma beccarianum. Ecol. Res, 20: 205 – 214.
Parfitt, R.L., D.J. Giltrap, and J.S. Whitton. 1995. Contribution of organic matter and clay
minerals to the cation exchange capacity of soils. Commun. Soil Sci. Plant Anal.,
26:1343-1355.
Park, S.C., T.C. Smith, and M.S. Bisesi. 1992. Activities of phosphomonoesterase and
phosphodiesterase from Lumbriscus terrestris. Soil Biol. Biochem., 24:873-876.
Peterson, J.K. and H.F. Harrison, Jr. 1995. Sweet potato allelopathic substance inhibits
growth of purple nutsedge (Cyperus rotundus). Weed Technol., 9(2): 277 –280.
Pujiyanto, Sudarsono, A. Rachim, S. Sabiham, A. Sastiono, and J.B. Baon. 2003. Pengaruh
bahan organik dan jenis tanaman penutup tanah terhadap bentuk bahan organik tanah,

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