Waterfowl damage to Canadian grain : current problem and research needs / by Lawson G. Sugden. : CW69-1/24E-PDF
"Waterfowl damage to crops in Alberta, Saskatchewan and Manitoba first became severe in the 1940's when the practice of swathing grain became prevalent. Mallards (Anas platyrhynchos) cause the most damage, which is sustained primarily by barley and wheat. Loss of grain is most severe in wet autumns that delay the harvest and tends to be chronic near large wetlands that harbour ducks in autumn"--Abstract.
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publications.gc.ca/pub?id=9.855508&sl=1
| Ministère/Organisme | Canada. Environment Canada. Canadian Wildlife Service. |
|---|---|
| Titre | Waterfowl damage to Canadian grain : current problem and research needs / by Lawson G. Sugden. |
| Titre de la série | Occasional paper ; no. 24 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. Includes abstract in French. |
| Information sur la publication | Ottawa : Canadian Wildlife Service, c1976. |
| Auteur / Contributeur | Sugden, Lawson G. |
| Description | 25 p. |
| Numéro de catalogue |
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| Descripteurs | Aquatic birds Crops Pests Waterfowl |