AI SearchThe effects of depth of water on growth, yield and weed competition in rice (Record no. 35080)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04041nas|a2200433 i 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260818095229.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 021226s2001 th uzm rtt 00| a1eng d |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b11871957 |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Thesis no. AS-01-13 |
| 100 0# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Le Thi Hoa Sen |
| 245 14 - TITLE STATEMENT | |
| Title | The effects of depth of water on growth, yield and weed competition in rice |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Bangkok : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 2001 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 47 leaves |
| 490 1# - SERIES STATEMENT | |
| Series statement | Thesis ; |
| Volume/sequential designation | no. AS-01-13 |
| 500 ## - GENERAL NOTE | |
| General note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of environment, Resource and Development |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Sc.) - Asian Institute of Technology, 2001 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | Weeds constitute a group of plants growing where they are not wanted. In lowland rice, grasses, sedges and broad leaves grow and compete with rice for light, nutrient, space and water. Weed infestation primarily constrains rice production by reducing grain yield. In order to control weeds in rice, several weed control methods were discovered. However, rice growers still face many difficulties in solving weed problems. Water management is an indigenous method for controlling weeds in rice. This study was therefore conducted to find out an effective weed management practice to assist rice growers. The preliminary laboratory study confirmed that the depth of water at 0 cm and 2 cm were favorable for rice seed germination and emergence. The water depth above 2 cm reduced germination of rice seeds. In submerged conditions, rice population was reduced, and establishment was little late The highest number of tillers was produced at water depth between 4 and 6, while the lowest at 0 and 2cm. The latter caused heavy weed growth and casualties to rice plants. Removal of weeds at 35 DAS caused significant increases in growth and yield of rice. Number of grains per panicle remained unchanged above 4 cm. There was a reduction of number of productive grains per panicle at 0 and 2 cm. However, removal of weeds at 35DAS reduced the casualties. The 100-grain weight remained unchanged at the depth of water above 4 cm and in the two control treatments. The highest hundred-grain weight was shown at 6 and 8cm. Grain yield of rice increased with increasing the depth of water from 0 to 4 cm, but yield was not significantly different at water depths from 4 to 8 cm without removal of weeds at 35 DAS. When weeds were removed at 35 DAS, there were no yield differences with increasing water depth from 0 to 8 cm. Although yield parameters showed their highest values at different water depths, the optimum conditions for the combined effect on increasing the final grain yield were found between 4 to 6 cm depths. |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Rice |
| General subdivision | Weed control |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Water in agriculture |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Rice |
| General subdivision | Irrigation |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Ranamukhaarachchi, S.L., |
| Relator term | Chairperson |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Zoebisch, Michael A., |
| Relator term | Examination Committee |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Shivakoti, Ganesh P., |
| Relator term | Examination Committee |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Swedish International Development Agency (Sida), |
| Relator term | Scholarship donor |
| 810 2# - SERIES ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Asian Institute of Technology. |
| Title of a work | Thesis ; |
| Volume/sequential designation | no. AS-01-13 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href="http://203.159.5.9/ait-thesis/detail.php?q=B07816">http://203.159.5.9/ait-thesis/detail.php?q=B07816</a> |
| 907 ## - LOCAL DATA ELEMENT G, LDG (RLIN) | |
| a | .b11871957 |
| b | mnait |
| c | u |
| 902 ## - LOCAL DATA ELEMENT B, LDB (RLIN) | |
| a | 240403 |
| 998 ## - LOCAL CONTROL INFORMATION (RLIN) | |
| Operator's initials, OID (RLIN) | 0 |
| Cataloger's initials, CIN (RLIN) | 021226 |
| First date, FD (RLIN) | m |
| -- | a |
| -- | u |
| -- | 4 |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnarc |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 20-AIT Publication |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 40-Archives |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120378855 |
| CREATED | CREATED : 2001-07-29 |
| RECORD Id | RECORD # : i12310554 |
| LPATRON | LPATRON : 1026986 |
| LCHKIN | LCHKIN : 2017-12-07 |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 4 |
| -- | TOT CHKOUT : 8 |
| -- | TOT RENEW : 3 |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120696512 |
| CREATED | CREATED : 2001-07-29 |
| RECORD Id | RECORD # : i12310566 |
| LPATRON | LPATRON : 1017213 |
| LCHKIN | LCHKIN : 2005-10-07 |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 1 |
| -- | TOT CHKOUT : 6 |
| -- | TOT RENEW : 17 |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120359574 |
| CREATED | CREATED : 2016-09-06 |
| RECORD Id | RECORD # : i13028480 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 0 |
| -- | TOT RENEW : 0 |
| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Cost, normal purchase price | Total checkouts | Full call number | Barcode | Date last seen | Copy number | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 18/08/2026 | 50.00 | AIT Thesis no. AS-01-13 | 30050120378855 | 18/08/2026 | 1 | 18/08/2026 | 20-AIT Publication | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 18/08/2026 | 50.00 | AIT Thesis no. AS-01-13 | 30050120696512 | 18/08/2026 | 2 | 18/08/2026 | 20-AIT Publication | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 18/08/2026 | AIT Thesis no. AS-01-13 | 30050120359574 | 18/08/2026 | 1 | 18/08/2026 | 40-Archives |