| Tag |
First Indicator |
Second Indicator |
Subfields |
| LEADER |
00000ctm a2200000Ka 4500 |
| 001 |
in00001522813 |
| 005 |
20220103134722.0 |
| 007 |
cr unu a |
| 008 |
000125s1999 xx ab b 000 0 eng d |
| 035 |
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|a (OCoLC)43342982
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| 040 |
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|a TXA
|c TXA
|d UtOrBLW
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| 049 |
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|a TXAM
|a TXAR
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| 099 |
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|a 1999
|a Thesis
|a W37
|
| 100 |
1 |
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|a Wesch, Richard Albert.
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| 245 |
1 |
4 |
|a The occurrence and diversity of tree legumes as influenced by soil properties in selected tropical forests in Costa Rica /
|c by Richard Albert Wesch.
|
| 264 |
|
1 |
|a [Place of publication not identified] :
|b [publisher not identified] ;
|c 1999.
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| 300 |
|
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|a xi, 187 leaves :
|b illustrations, map ;
|c 28 cm.
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| 336 |
|
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|a text
|b txt
|2 rdacontent
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| 337 |
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|a computer
|b c
|2 rdamedia
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| 338 |
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|a online resource
|b cr
|2 rdacarrier
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| 500 |
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|a "Major subject: Agronomy".
|
| 500 |
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|a Vita.
|
| 502 |
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|b M.S.
|c Texas A&M University
|d 1999.
|
| 504 |
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|a Includes bibliographical references (leaves 155-167).
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| 520 |
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|a Legumes play important roles in tropical forests due to their contribution to N₂-fixation and nutrient cycling. Our objectives were to determine which soil properties, if any, affect the occurrence and distribution of tree legumes in a tropical wet and a tropical dry forest in Costa Rica, to make small-scale inventories of the legume populations of these same forests and to study the soil ameliorative effects of legumes and non-legumes. Tree and soil surveys were undertaken in both forests for these purposes. Soil properties found to influence legume occurrence in the dry forest were texture and exchangeable Mg content. Exchangeable K, Ca and available P were influential on the occurrence of members of the Leguminosae subfamilies. In the wet forest, soil properties found to influence legume occurrence were levels of available P and exchangeable Al. In addition to these, other variables such as texture and exchangeable Ca and Mg were influential on the occurrence of the legume Pentaclethra macroloba, a very abundant species in this forest. Based on the Shannon index of diversity, legume species were most diverse in the dry forest followed by the ultisol soil and inceptisol soil sites in the wet forest. Differences in the soil under legumes and non-legumes in the dry tropical forest include levels of exchangeable Ca, soil pH and total Mo.
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| 530 |
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|a Also available online.
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| 530 |
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|a Issued also on microfiche from Lange Micrographics.
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| 650 |
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4 |
|a Major agronomy.
|
| 856 |
4 |
1 |
|u https://hdl.handle.net/1969.1/ETD-TAMU-1999-THESIS-W37
|z Link to OAKTrust copy
|t 0
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| 948 |
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|a cataloged
|b h
|c 2000/1/25
|d c
|e eneff
|f 9:00:50 am
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| 994 |
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|a E0
|b TXA
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| 999 |
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|a MARS
|
| 999 |
f |
f |
|s aa52f1a9-9ff5-3333-ac15-f0849ac50508
|i 6310baf1-67a6-3c63-85bb-e26270b13125
|t 0
|
| 952 |
f |
f |
|p noncirc
|a Texas A&M University
|b College Station
|c Cushing Memorial Library & Archives
|s cush tdrm
|d Cushing: Theses & Dissertations Microforms (Does not check out)
|t 0
|e 1999 Thesis W37
|h Other scheme
|i computer -- online resource
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| 952 |
f |
f |
|a Texas A&M University
|b College Station
|c Electronic Resources
|s www_evans
|d Available Online
|t 0
|e 1999 Thesis W37
|h Other scheme
|
| 998 |
f |
f |
|a 1999 Thesis W37
|t 0
|l Available Online
|
| 998 |
f |
f |
|a 1999 Thesis W37
|t 0
|l Cushing: Theses & Dissertations Microforms (Does not check out)
|