Page 183 - Ilmu Tanah

170 The Chemistry and Fertility of Soils under Tropical Weeds

Salam, A.K., N. Sriyani, S.K. Dewi, and F. Santoso. 2019. Weed-root induced release of
potassium in tropical soils. (In review).
nd
Salam, A.K. 2019. Ilmu Tanah Fundamental. 2 Ed. Bandar Lampung: Global Madani Press.
(In Indonesian).
Samuel, A.L. and A.O. Ebenezer. 2014. Mineralization rates of soil forms of nitrogen,
phosphorus, and potassium as affected by organomineral fertilizer in sandy loam. Adv.
Agric., Article ID 149209, 5 p.
Sanders, J.R. 1982. The effect of pH upon the copper and cupric ion concentrations in soil
solution. J. Soil Sci., 33:679-689.
Santelmann, P.W. 1987. Herbicide bioassay. pp. 79-87. In B. Truelove (Ed.). Research
Method in Weed Science. Southern Weed Science Society of America.
Sarapatka, B., L. Dudova, and M. Krskova. 2004. Effect of pH and phosphate supply on acid
phosphatase activity in cereal roots. Biologia, 59(1):127-131.
Satchell, J.E. and K. Martin. 1984. Phosphatase activity in earthworm faeces. Soil Biol.
Biochem., 16:191-194.
Satchell, J.E., K. Martin, and R. Krisnamoorthy. 1984. Stimulation of microbial phosphatase
production by earthworm activity. Soil Biol. Biochem., 16:195.
Schroder, J.L., H. Zhang, K. Girma, W.R. Raun, C.J. Penn, and M.E. Payton. 2011. Soil
acidification from long-term use of nitrogen fertilizers on winter wheat. Soil Sci. Soc.
Am. J., 75:957-964.
Schuhmacher, M., J.L. Domingo, J.M. Llobet, and J. Corbella. 1994. Cadmium, chromium,
copper, and zinc in rice and ricefield soil from Southern Catalonia, Spain. Bull. Environ.
Contam. Toxicol., 53:54-60.
Sembodo, D. R. J. 2010. Gulma dan Pengelolaannya. Graha Ilmu, Yogyakarta. (In
Indonesian).
Sembodo, D. R. J., N. Sriyani, and Afandi. 2012. Kajian pemanfaatan gulma in situ sebagai
sumber bahan organik yang berpotensi untuk memperbaiki kualitas lahan kritis. J.
Gulma Tumbuhan Invasif Trop. 3(1): 21-27. (In Indonesian).
Sembodo, D.R.J., N. Sriyani, Afandi, and M. Senge. 2017. Utilization of in situ weeds as
organic materials to improve quality of critical land. (In review)..
Shang, H.L., Y.L. Bi, S.P. Peng, and W.W. Xie. 2015. Mechanism of potassium release from
different silicate minerals by releasing K bacteria in Northwest Arid Land, China. Acta
Mineralogica Sinica 35, 337-343.
Singer, M.J. and D. Munns. 1987. Soils An Introduction. MacMillan Publ. Co., New York.
Singh, B. and G.S. Sekhon. 1977. Adsorption, desorption, and solubility relationship of lead
and cadmium in some alkaline soils. J. Soil Sci., 28;271-275.
Siregar, C. A. and S. Tjitrosoedirdjo. 1999. Acacia nilotica invasion in Baluran National Park
East Java Indonesia. pp. 101-109. In S. Tjitrosoedirdjo and I. C. Stuckle (Eds.).
Integrated Weed Management in Managed and Natural Ecosystem, Biotrop Special
Publication No. 61.
Song, F., X. Han, X. Zhu, and S.J. Herbert. 2012. Response to water stress of soil enzymes and
root exudates from drought and non-drought tolerant corn hybrids at different growth
stages. Can. J. Soil Sci., 92: 501–507.
Song, S.K. and P.M. Huang. 1988. Dynamic of potassium release from potassium-bearing
minerals as influenced by oxalic and citric acids. Soil Sci. Soc. Am. J., 52:383-390.
Speir, T.W., R. Lee, E.A. Pansier, and A. Cairns. 1980. A comparison of sulphatase, urease,
and protease activities in planted and in fallow soils. Soil Biol. Biochem., 12:281-291.

Abdul Kadir Salam and Nanik Sriyani – 2019