MARC details
| 000 -LEADER |
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| fixed length control field |
03503nab a22003977a 4500 |
| 001 - CONTROL NUMBER |
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| control field |
G365 |
| 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 |
20240919020901.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
210630s1976 xxk|||p|op||| 00| 0 eng d |
| 022 ## - INTERNATIONAL STANDARD SERIAL NUMBER |
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| International Standard Serial Number |
0021-8596 |
| 022 ## - INTERNATIONAL STANDARD SERIAL NUMBER |
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| International Standard Serial Number |
1469-5146 (Online) |
| 024 8# - OTHER STANDARD IDENTIFIER |
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| Standard number or code |
https://doi.org/10.1017/S0021859600026654 |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
MX-TxCIM |
| 041 0# - LANGUAGE CODE |
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| Language code of text/sound track or separate title |
eng |
| 043 ## - GEOGRAPHIC AREA CODE |
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| Geographic area code |
GB |
| 072 #0 - SUBJECT CATEGORY CODE |
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| Subject category code |
F01 |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
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| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
CIS-401 |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Fischer, R.A. |
| 9 (RLIN) |
7390 |
| 245 10 - TITLE STATEMENT |
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| Title |
Yield potential in a dwarf spring wheat and response to crop thinning |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
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| Place of publication, distribution, etc. |
United Kingdom : |
| Name of publisher, distributor, etc. |
Cambridge University Press, |
| Date of publication, distribution, etc. |
1976. |
| 340 ## - PHYSICAL MEDIUM |
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| Material base and configuration |
Printed |
| 500 ## - GENERAL NOTE |
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| General note |
Peer review |
| 500 ## - GENERAL NOTE |
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| General note |
Tables, references p. 122 |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
Experiments with wheat describing the effects of crop thinning on grain yield and its components are presented. These were carried out over 5 years in northwest Mexico, using a high-yielding dwarf spring-wheat variety (Triticum aestivum cv. ‘Yecora 70’) grown under irrigation and high fertility. It was shown that thinning largely relieved competition for light, thus increasing photosynthate levels in the plants remaining after thinning. The objective was to evaluate this simple technique as a guide to understanding when grain yield and its components were determined and, in particular, the extent to which post-anthesis photosynthate supply limited yield. There were major responses in grain yield with thinning between about 50 and 100 days after seeding, and in number of spikes and of grains with thinning between 50 and 90 days (50% anthesis was reached at 87 days). Number of spikelets per spike showed small responses to early thinning (before 50 days). Number of grains/spikelet and kernel weight snowed positive responses to thinning between 65 and 90 days, and 90 and 115 days, respectively. These results agreed with adjacent shading and CO2 fertilization studies but, because of certain difficulties in interpretation of responses, pre-anthesis thinning was not considered a very useful technique. Anthesis thinning was carried out on 21 separate crops: the kernel weight increase relative to the unthinned control ranged from 6 to 41%, averaging 20%. Anthesis thinning led to increases in stem weight during the first half of the grain filling period, followed by increases in grain growth rate in the latter half. The increase in final kernel weight was greater with higher temperature and lower radiation during grain filling; these variables explained 64% of the variation in kernel weight response. It is suggested that the kernel weight response does indicate the degree of photosynthate limitation during grain filling, showing reasonable agreement with adjacent shading and CO2 fertilization studies. It was concluded that anthesis thinning, because of its relative simplicity, is a useful technique. Implications for yield improvement in Yecora of the results provided by this technique are discussed. |
| 546 ## - LANGUAGE NOTE |
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| Language note |
Text in English |
| 591 ## - CATALOGING NOTES |
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| Affiliation |
CMP|MIC 5389-R|3 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
High-yielding varieties |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1147 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Irrigated farming |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Mexico |
| 9 (RLIN) |
46 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Thinning |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| 9 (RLIN) |
1313 |
| Topical term or geographic name as entry element |
Yields |
| Source of heading or term |
AGROVOC |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Laing, D.R. |
| 9 (RLIN) |
20721 |
| 773 0# - HOST ITEM ENTRY |
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| Title |
Journal of Agricultural Science, Cambridge |
| Note |
605202, 611435 |
| Related parts |
v. 87, no. 1, p. 113-122 |
| Place, publisher, and date of publication |
United Kingdom : Cambridge University Press, 1976. |
| Record control number |
G444500 |
| International Standard Serial Number |
0021-8596 |
| 856 4# - ELECTRONIC LOCATION AND ACCESS |
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| Link text |
Access only for CIMMYT Staff |
| Uniform Resource Identifier |
https://hdl.handle.net/20.500.12665/497 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Koha item type |
Article |
| Source of classification or shelving scheme |
Dewey Decimal Classification |
| Suppress in OPAC |
No |