MARC details
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03775nam a2200313 a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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20240206095659.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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070524s19uu xx 00 eng d |
| 040 ## - CATALOGING SOURCE |
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| Transcribing agency |
CvSU Main Campus Library |
| 041 0# - LANGUAGE CODE |
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| Language code of text/sound track or separate title |
eng |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER |
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| Classification number |
631.4 |
| Item number |
B29 1988 |
| 100 #0 - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Basilio, Pearl R. |
| Relator term |
author |
| 9 (RLIN) |
42332 |
| 245 10 - TITLE STATEMENT |
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| Title |
Pottasum status and exchange characteristics of some lowland soils in Luzon / |
| Statement of responsibility, etc. |
Pearl R. Basilio. |
| 260 0# - PUBLICATION, DISTRIBUTION, ETC. |
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| Place of publication, distribution, etc. |
Los Baños, Laguna, |
| Date of publication, distribution, etc. |
1988. |
| Name of publisher, distributor, etc. |
Cavite State University- Main Campus, |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
85 pages : |
| Other physical details |
illustrations ; |
| Dimensions |
28 cm. |
| 336 ## - CONTENT TYPE |
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| Source |
rdacontent |
| Content type term |
text |
| 337 ## - MEDIA TYPE |
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| Source |
rdamedia |
| Media type term |
unmediated |
| 338 ## - CARRIER TYPE |
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| Source |
rdacarrier |
| Carrier type term |
volume |
| 500 ## - GENERAL NOTE |
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| General note |
Thesis (M.S. - - Soil Science) University of the Philippines, College, Laguna. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc. note |
Includes bibliographical references. |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
BASILIO, PEARL R., University of the Philippines at Los Banos, October, 1988. Potassium Status and Exchange Characteristics of Some Lowland Soils in Luzon. Major Professor: Dr. Genaro 0. San Valentin<br/><br/>The study was conducted to evaluate the potassium (K) status and exchange characteristics of ten soils representing important lowland areas in Luzon. An inventory of the K content of the soils was made using the following extracting solutions: hydrogen fluoride (HF) for total K, sodium tetraphenylboron (NaTPB) for nonexchangeable K and ammonium acetate (MNH,0Ac) for exchangeable K. Quantity/Intensity (Q/I) parameters derived from the Q/I curves were tested against K availability indices to assess its value in characterizing K status. Q/I data described K status by reJating the intensity (1) of K to the amount (Q) of labile K in the soil.<br/><br/>A greenhouse experiment was conducted to determine the influence of K addition and K uptake on the Q/I parameters of selected lowland soils and at the same time assess their K supplying capacity. A high soil to plant ratio was used to exhaust available K supply in a_ short period. Right of the soils studied contained 2:1 expanding type of clay minerals Bantog and Tarlac were dominated by vermiculite. X-ray diffraction patterns of the sand fractions of all the soils showed the presence of quartz and feldspars. The soils varied in their chemical characteristics which include pH, cation exchange capacity, organic matter content, changeable K, NaTPB-extractable K, ark., Z\K9 and<br/>pEck,<br/><br/>The exchangeable K contents (NH4OAc extractable K) of eight soils were found to be below the satisfactory level of exchangeable K for rice. Only San Manuel T and Rantog had an exchangeable K level higher than 0.2 me/100g. Significant correlations were found between exchangeable K and aRK, (x = 0.77) and /\K° (r = -0.96). Sodium tetraphenylboron extractions gave higher values for K than NH4QAc extractions since it was able to extract even the "difficulty available" K.<br/><br/>Although the soils contained low exchangeable K, most of the soils with the exception of La Paz, Tarlac, and Buenavista, have high buffering capacities (PEC). Significant correlation between pack and clay content (x = 0.81) and CEC (r = 0.87) were recorded.<br/><br/>The Q/I relations of the soils used in the greenhouse experiment (Maligaya I and San Marnasl I) redetermined after K addition and after the soils have been depleted of K by crop uptake were transposed vertically in the direction expect<br/> |
| 541 ## - IMMEDIATE SOURCE OF ACQUISITION NOTE |
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| Method of acquisition |
Submitted to the University Library |
| Date of acquisition |
01/07/1994 |
| Accession number |
T-1362 |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Soils |
| 9 (RLIN) |
3106 |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Potassium |
| 9 (RLIN) |
42333 |
| 690 ## - LOCAL SUBJECT ADDED ENTRY--TOPICAL TERM (OCLC, RLIN) |
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| 9 (RLIN) |
1421 |
| Course or Program |
Master of Science |
| Major |
Soil Science |
| 700 ## - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
San Valentin, Genaro O. |
| 9 (RLIN) |
42334 |
| Relator term |
adviser |
| 856 ## - ELECTRONIC LOCATION AND ACCESS |
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| Port |
80 |
| Link text |
Click here to view thesis abstract and table of contents |
| Electronic File |
<a href="http://library.cvsu.edu.ph/cgi-bin/koha/opac-retrieve-file.pl?id=8673a57274a482f8ab7834a76c2bf2b2">http://library.cvsu.edu.ph/cgi-bin/koha/opac-retrieve-file.pl?id=8673a57274a482f8ab7834a76c2bf2b2</a> |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Dewey Decimal Classification |
| Koha item type |
Theses / Manuscripts |
