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Potassium exhange characteristics and clay mineral composition of major agricultural soils in West Java / Sri Djuniwati Wipartono.

By:

Wipartono, Sri Djuniwati [author]

Contributor(s):

San Valentin, Genaro O [adviser]

Material type: Text

TextLanguage: English Publication details: Los Baños, Laguna : 1986. Cavite State University- Main Campus,Description: 33 pages : illustrations ; 28 cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

631.4 W74 1986

Online resources:

Click here to view thesis abstract and table of contents

Abstract: WIPARTONO, SRI DJUNIWATI. University of the Philippines at Los Banos, May 1986. Potassium Exchange Characteristics and Clay Mineral Composition of Major Agricultural Soils in West Java. Major Professor: Dr. Genaro 0. San Valentin The study was conducted to determine clay mineral composition and potassium status and exchange characteristics of major agricultural soils in West Java, Potassium availability indices including HCl-extractable K, NH, OAc-extractable K, NaTPB extractable K and Q/I parameter were studied using five soils from Padalarang, Cipatat, Cisarua, Sukabumi and Pelabuhan Ratu, West Java, Indonesia. The soils differed from each other with respect to mineralogical and chemical characteristics of the soils. The mineralogical composition of the clay fraction of the five soils contained kaolinite, however, the soil from Padalarang and Pelabuhan Ratu both have smectite as dominant constituent of the clay fraction. Likewise, soil from Cipatat, Cisarua and Sukabumi appeared to contain undetermined quantities of amorphous mineral. According to the chemical characteristic of the soils, Padalarang had the highest total K, HCl-extractable K, NaTPB extractable K, and highest in Gapon selectivity coefficient (Kg). For the Q/I parameter, Padalarang also exhibited the highest value of A K° and pack although it contained lower value of ark, However, Cipatat, the most weathered of the five soils whose clay particle largely kaolinite exhibited the lowest total K, HCl-extractable K, NH,OAc-extractable K values and the lowest (together with Cisarua). NaTPB-extractable K, Likewise, Cipatat had the lowest ark » AK, K, and pack values. These observations are expected because of the colloidal properties of kaolinite. The effect of K applied to the soils generally showed that retention of K from KyS0,, was greater than from KCl, Consequently, and it was more obvious in certain soils that K uptake by 2 weeks old corn was greater in KCl than those in K,S0, treated samples. The correlation of the various pair, K parameters revealed the following significant correlations: K uptake vs NH,OAc~ extractable K, K uptake vs K,, total K vs HCl-extractable K, total K vs AK®°, total K vs K,, total K vs PBCK, HCl extractable K vs NH,OAc-extractable K, HCl-extractable K vs AK, HCl-ex- tractable K vs pack, NH,OAc-extractable K vs K,, NaTPB extractable K vs A K°, NaTPB extractable K vs PBCK and A K° vs pack.

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Holdings ( 1 )
Title notes ( 4 )

Holdings
Item type	Current library	Collection	Call number	Materials specified	URL	Status	Notes	Date due	Barcode
Theses / Manuscripts	Ladislao N. Diwa Memorial Library Theses Section	Non-fiction	631.4 W74 1986 (Browse shelf(Opens below))		Link to resource	Room use only	T-1313		00002257

Thesis (M.S. - - Soil Science) University of the Philippines, College, Laguna.

Includes bibliographical references.

WIPARTONO, SRI DJUNIWATI. University of the Philippines at Los Banos, May 1986. Potassium Exchange Characteristics and Clay Mineral Composition of Major Agricultural Soils in West Java. Major Professor: Dr. Genaro 0. San Valentin

The study was conducted to determine clay mineral composition and potassium status and exchange characteristics of major agricultural soils in West Java, Potassium availability indices including HCl-extractable K, NH, OAc-extractable K, NaTPB extractable K and Q/I parameter were studied using five soils from Padalarang, Cipatat, Cisarua, Sukabumi and Pelabuhan Ratu, West Java, Indonesia.

The soils differed from each other with respect to mineralogical and chemical characteristics of the soils. The mineralogical composition of the clay fraction of the five soils contained kaolinite, however, the soil from Padalarang and Pelabuhan Ratu both have smectite as dominant constituent of the clay fraction. Likewise, soil from Cipatat, Cisarua and Sukabumi appeared to contain undetermined quantities of amorphous mineral.

According to the chemical characteristic of the soils, Padalarang had the highest total K, HCl-extractable K, NaTPB extractable K, and highest in Gapon selectivity coefficient (Kg). For the Q/I parameter, Padalarang also exhibited the highest value of A K° and pack although it contained lower value of ark, However, Cipatat, the most weathered of the five soils whose clay particle largely kaolinite exhibited the lowest total K, HCl-extractable K, NH,OAc-extractable K values and the lowest (together with Cisarua). NaTPB-extractable K, Likewise, Cipatat had the lowest ark » AK, K, and pack values. These observations are expected because of the colloidal properties of kaolinite.

The effect of K applied to the soils generally showed that retention of K from KyS0,, was greater than from KCl, Consequently, and it was more obvious in certain soils that K uptake by 2 weeks old corn was greater in KCl than those in K,S0, treated samples.

The correlation of the various pair, K parameters revealed the following significant correlations: K uptake vs NH,OAc~ extractable K, K uptake vs K,, total K vs HCl-extractable K, total K vs AK®°, total K vs K,, total K vs PBCK, HCl extractable K vs NH,OAc-extractable K, HCl-extractable K vs AK, HCl-ex-

tractable K vs pack, NH,OAc-extractable K vs K,, NaTPB extractable K vs A K°, NaTPB extractable K vs PBCK and A K° vs pack.

Submitted to the University Library 01/07/1994 T-1313