MARC details
| 000 -LEADER |
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| fixed length control field |
03451nam a22003977a 4500 |
| 001 - CONTROL NUMBER |
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| control field |
G65054 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
MX-TxCIM |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20190401213003.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
121211s ||||f| 0 p|p||0|| | |
| 020 ## - INTERNATIONAL STANDARD BOOK NUMBER |
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| International Standard Book Number |
968-6923-93-4 |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
MX-TxCIM |
| 072 #0 - SUBJECT CATEGORY CODE |
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| Subject category code |
F60 |
| 072 #0 - SUBJECT CATEGORY CODE |
|---|
| Subject category code |
P10 |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER |
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| Classification number |
633.153 |
| Item number |
EDM |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
|---|
| Personal name |
White, J.W. |
| Affiliation |
Developing Drought- and Low N-Tolerant Maize; Proceedings of a Symposium; El Batan, Tex. (Mexico); 25-29 Mar 1996 |
| 9 (RLIN) |
1789 |
| 110 2# - MAIN ENTRY--CORPORATE NAME |
|---|
| Corporate name or jurisdiction name as entry element |
Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico) |
| 245 00 - TITLE STATEMENT |
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| Title |
Characterizing patterns of water deficit and nitrogen stress in maize growing regions of the tropics |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
|---|
| Place of publication, distribution, etc. |
Mexico, DF (Mexico) |
| Name of publisher, distributor, etc. |
CIMMYT : |
| Date of publication, distribution, etc. |
1997 |
| 340 ## - PHYSICAL MEDIUM |
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| Material base and configuration |
Printed |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
Water and nitrogen deficits frequently reduce maize production in tropical regions, but it is difficult to assign precise values to their impact or to subdivide regions experiencing water deficit into well-defined categories. Nonetheless, there are clear benefits to obtaining such information. Assessments of impact are crucial to priority setting, while classification of patterns of water deficit can improve targeting of research both in crop improvement and crop management. Simple classifications using subjective evaluations or analyses of monthly weather data are useful, but there is strong demand for more quantitative approaches. Process-based crop growth models show much promise for integrating effects of diverse environmental and agronomic factors, but such models are very data intensive. This paper examines three facets of use of models for characterizing patterns of water deficit and nitrogen stress for maize growing regions of the tropics. The water deficit index (WDI) of the CERES-Maize model was found to show promise as an indicator of seasonal variation in water deficit. Similarly, the nitrogen stress index (NSI) of the model appears useful for nitrogen deficit. The model predicted that water deficits show much stronger seasonal variation than nitrogen stress and that varying N-fertilization levels has relatively little impact on variation in WDI. Thus, WDI shows strong spatial and temporal variation, while NSI shows mainly spatial variation. The daily weather data required by simulation models are seldom available for large numbers of sites, so researchers have developed "weather generators" that create simulated weather data based on monthly means, which are easily interpolated over geographic regions. Although the two generators examined, WGEN and SIMMETEO, provided weather data that gave mean yields similar to those obtained from observed weather data, they did not capture expected associations between date of onset of growing seasons and total seasonal precipitation. Thus, data from weather generators may not be suitable for lese with models simulating detailed mechanisms of adaptation to water deficit. |
| 546 ## - LANGUAGE NOTE |
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| Language note |
English |
| 591 ## - CATALOGING NOTES |
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| Affiliation |
9801|AGRIS 9702|anterior|R97-98PROCE|FINAL9798 |
| 595 ## - COLLECTION |
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| Collection |
CIMMYT Publications Collection |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| 9 (RLIN) |
1081 |
| Topical term or geographic name as entry element |
Drought stress |
| Miscellaneous information |
AGROVOC |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Nitrogen |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Plant physiology |
| 9 (RLIN) |
1210 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Plant production |
| 9 (RLIN) |
1212 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Tropical zones |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Water depletion |
| 653 0# - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
CIMMYT |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| 9 (RLIN) |
1314 |
| Topical term or geographic name as entry element |
Zea mays |
| Miscellaneous information |
AGROVOC |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Edmeades, G.O.|Banziger, M.|Mickelson, H.R.|Peña-Valdivia, C.B. |
| Relator term |
eds. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Elings, A., |
| Relator term |
coaut. |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Koha item type |
Conference proceedings |