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Genesis and fertility of alfisols an...

Mella, Welhelmus Isak Imanuel.

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Genesis and fertility of alfisols and mollisols formed on raised coral reef in West Timor, Indonesia.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Genesis and fertility of alfisols and mollisols formed on raised coral reef in West Timor, Indonesia./
Author:	Mella, Welhelmus Isak Imanuel.
Description:	230 p.
Notes:	Source: Dissertation Abstracts International, Volume: 65-03, Section: B, page: 1092.
Contained By:	Dissertation Abstracts International65-03B.
Subject:	Agriculture, Soil Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ90556
ISBN:	061290556X

Genesis and fertility of alfisols and mollisols formed on raised coral reef in West Timor, Indonesia.
Mella, Welhelmus Isak Imanuel.

Genesis and fertility of alfisols and mollisols formed on raised coral reef in West Timor, Indonesia. - 230 p.

Source: Dissertation Abstracts International, Volume: 65-03, Section: B, page: 1092.

Thesis (Ph.D.)--The University of Saskatchewan (Canada), 2004.

Soils forming on or associated with limestone can be derived from the concentration of non-carbonate impurities and wind (eolian) and water transported materials. The objectives of this investigation were to: (1) study the chemical, physical, and mineralogical properties of red Alfisols and black Mollisols and the underlying coral reef limestone to determine the genesis of these soils in West Timor, Indonesia and (2) evaluate their fertility.

ISBN: 061290556XSubjects--Topical Terms:

1017824
Agriculture, Soil Science.

Genesis and fertility of alfisols and mollisols formed on raised coral reef in West Timor, Indonesia.
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100 1 $a Mella, Welhelmus Isak Imanuel. $3 1931659
245 1 0 $a Genesis and fertility of alfisols and mollisols formed on raised coral reef in West Timor, Indonesia.
300 $a 230 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-03, Section: B, page: 1092.
500 $a Adviser: A. R. Mermut.
502 $a Thesis (Ph.D.)--The University of Saskatchewan (Canada), 2004.
520 $a Soils forming on or associated with limestone can be derived from the concentration of non-carbonate impurities and wind (eolian) and water transported materials. The objectives of this investigation were to: (1) study the chemical, physical, and mineralogical properties of red Alfisols and black Mollisols and the underlying coral reef limestone to determine the genesis of these soils in West Timor, Indonesia and (2) evaluate their fertility.
520 $a Forty seven soil profiles (12 cultivated and 12 uncultivated Alfisols; 13 cultivated and 10 uncultivated Mollisols) were included in this study. Chemical and mineralogical properties, organic C content and functional groups, total N and S, available N, P, K, Fe, Zn, Cu, and nutrient status of corn leaves were determined.
520 $a Alfisols contained higher amounts of crystalline and poorly crystalline Fe-oxides than the Mollisols. Alfisols were slightly acidic; while Mollisols were neutral to slightly alkaline. Alfisols were dominated by kaolinite, Mollisols by smectite. The clay fractions of Mollisols contained more silica and less aluminum and iron than that of Alfisols.
520 $a Mollisols were located on steeper slopes (5--10%) and were thinner, whereas Alfisols were thicker and occupied more level landscape positions (<5%). Therefore, Mollisols exhibited somewhat more erosion and constant rejuvenation. These properties confirmed that Alfisols were pedologically more advanced in their development than the Mollisols.
520 $a On average, the dissolution of coral limestones yielded 1.7% insoluble residue, with a clay mineral composition similar to that of Mollisols. The above supports the idea that Alfisols and Mollisols had developed from the weathering of limestone with addition of external eolian dust deposit, especially in the case of Alfisols. Evidence of microorganisms, especially fungi, playing a role in the weathering of the limestones was found through microscopic studies.
520 $a On average, Mollisols were richer in basic cations, nutrients, and organic C than Alfisols, more distinct in the A horizon. However, the functional groups of their organic C, as determined from the 13C CP/MAS NMR spectra, were similar. Cultivation reduced the organic C in both soils, especially in the A horizons. Despite these facts, the Mollisols can be regarded as soils with good potential for sustainable agriculture in West Timor, Indonesia.
590 $a School code: 0780.
650 4 $a Agriculture, Soil Science. $3 1017824
690 $a 0481
710 2 0 $a The University of Saskatchewan (Canada). $3 1025078
773 0 $t Dissertation Abstracts International $g 65-03B.
790 1 0 $a Mermut, A. R., $e advisor
790 $a 0780
791 $a Ph.D.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ90556