MARC details
| 000 -LEADER |
|---|
| fixed length control field |
01576nab a22003737a 4500 |
| 001 - CONTROL NUMBER |
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| control field |
G33942 |
| 003 - CONTROL NUMBER IDENTIFIER |
|---|
| control field |
MX-TxCIM |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
|---|
| fixed length control field |
121211b |||p||p||||||| |z||| | |
| 040 ## - CATALOGING SOURCE |
|---|
| Original cataloging agency |
MX-TxCIM |
| 041 0# - LANGUAGE CODE |
|---|
| Language code of text/sound track or separate title |
En |
| 043 ## - GEOGRAPHIC AREA CODE |
|---|
| Geographic area code |
US |
| 072 #0 - SUBJECT CATEGORY CODE |
|---|
| Subject category code |
F30 |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
|---|
| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
REP-3988 |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
|---|
| Personal name |
Plucknett, D.L. |
| 245 00 - TITLE STATEMENT |
|---|
| Title |
Sustaining agricultural yields |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
|---|
| Date of publication, distribution, etc. |
1986 |
| 340 ## - PHYSICAL MEDIUM |
|---|
| Material base and configuration |
Printed |
| 500 ## - GENERAL NOTE |
|---|
| General note |
Graphs, references p. 44-45 |
| 520 ## - SUMMARY, ETC. |
|---|
| Summary, etc. |
The principles and scope of maintenance research are examined and the role of plant breeding in this research is considered. Maintenance research is seen as particularly important in maintaining the yield gains obtained from improved varieties, in combating evolutionary changes in crop pests, particularly in the tropics where reproduction occurs throughout the year, and in incorporating a range of resistance genes (rather than a single gene) into crops to produce a more durable resistence. Examples of breeding to maintain yields, for example through improved pest resistance, are taken from a range of crop breeding programs in a |
| 546 ## - LANGUAGE NOTE |
|---|
| Language note |
English |
| 595 ## - COLLECTION |
|---|
| Collection |
Reprints Collection |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Crop yield |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1066 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Genetic stability |
| 9 (RLIN) |
1128 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Germplasm conservation |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Research |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Research policies |
| 9 (RLIN) |
1236 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Varieties |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1303 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Yield components |
| 9 (RLIN) |
1312 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Yield factors |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Plant breeding |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1203 |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Smith, N.J.H., |
| Relator term |
coaut. |
| 773 0# - HOST ITEM ENTRY |
|---|
| Title |
Bioscience |
| Note |
601480 |
| Related parts |
v. 36, no. 1, p. 40-45 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Koha item type |
Article |