Efficacy and economics of weed management strategies in aerobic rice (Oryza sativa L.) (Record no. 141179)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02999nam a22002057a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20220401134308.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 160215b xxu||||| |||| 00| 0 eng d |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 630 |
| Item number | RES/EF |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Reshma R S |
| 245 ## - TITLE STATEMENT | |
| Title | Efficacy and economics of weed management strategies in aerobic rice (Oryza sativa L.) |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc. | Vellayani |
| Name of publisher, distributor, etc. | Department of Agronomy, College of Agriculture |
| Date of publication, distribution, etc. | 2014 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 120p. |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | MSc |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | The experiment entitled “Efficacy and economics of weed management strategies in aerobic rice (Oryza sativa L.)” was undertaken at the Instructional Farm, College of Agriculture, Vellayani, Thiruvanthapuram, during January, 2013 to May, 2014. The main objectives of the study were to assess the extent of yield loss due to weeds in aerobic rice, to assess the most suitable weed management strategy for aerobic rice and to study the economic feasibility. The field experiment, laid out in randomised block design, comprised seven weed management practices (variety – Aiswarya) compared against a control (variety – MAS 946-1), replicated thrice. The treatments were W1: hand weeding (HW) at 15, 30 and 45 DAS (days after sowing) ,W2 : mechanical weeding, W3 : mechanical weeding with power weeder, W4 : mulching with straw @ 4 t ha-1,W5 : oxyfluorfen @ 0.15 kg a.i ha-1 + HW at 20 DAS, W6 : pretilachlor @ 0.75 kg a.i ha-1 + HW at 20 DAS, W7 : weedy check and Control (C): MAS 946 – 1, maintained weed-free by HW at 15, 30 and 45 DAS. The results of the study were as follows: The treatment, W5 (oxyfluorfen @ 0.15 kg a.i ha-1 + hand weeding at 20 DAS) was superior or equally effective as W1 (hand weeding 15, 30, 45 DAS) with respect to growth attributes and dry matter production of rice. Yield attributes were significantly superior at W5 (oxyfluorfen @ 0.15 kg a.i ha-1 + hand weeding at 20 DAS). Grain yield was maximum (3889 kg ha-1) with W1 (hand weeding 15, 30, 45 DAS) and remained at par (3500 kg ha-1) with W5. Harvest index also was highest for W1 and remained at par with W5. In general, broad leaved weeds were more, compared to grasses and sedges. The total weed density, weed dry matter production and nutrient removal by weeds were lesser at W5, which recorded the highest weed control efficiency. The net income and benefit cost ratio of Aiswarya (1.62) was significantly higher at W5. The treatments when compared against control, revealed the superiority of the aerobic rice variety MAS 946-1 with significantly higher tiller count, grain yield and net income. Considering the growth, yield attributes, yield and economics, the pre-emergence application of oxyfluorfen @ 0.15 kg a.i ha-1 followed by hand weeding at 20 DAS was effective in managing the weed problem in rice (variety Aiswarya) raised under aerobic condition. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Agronomy |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Shalini Pillai P (Guide) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | http://krishikosh.egranth.ac.in/handle/1/5810025971 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | |
| Koha item type | Theses |
| Withdrawn status | Lost status | Damaged status | Not for loan | Collection code | Permanent Location | Current Location | Shelving location | Date acquired | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
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| Not For Loan | Reference Book | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 2014-11-22 | 630 RES/EF | 173321 | 2014-11-22 | 2014-11-22 | Theses |