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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Synecological effects of cattle grazing riparian ecosystems /

Kauffman, John Boone. January 1982 (has links)
Thesis (M.S.)--Oregon State University, 1982. / Typescript (photocopy). One ill. folded in pocket. Includes bibliographical references (leaves 207-218). Also available on the World Wide Web.
2

Assessment of veld utilisation practices and veld condition in the Little Karoo /

Cupido, Clement F. January 2005 (has links)
Thesis (MScBosb)--University of Stellenbosch, 2005. / Bibliography. Also available via the Internet.
3

EVALUATION OF WINTER FEEDING SYSTEMS FOR CROP YIELD AND AGRONOMY, BEEF COW PERFORMANCE, METABOLISM AND ECONOMICS

2015 September 1900 (has links)
Two experiments were conducted during the winters of 2012-13 (yr 1) and 2013-14 (yr 2), to evaluate 3 winter feeding systems: (i) field grazing standing whole plant corn (SC) cv. ‘DKC 26-25’ (yr 1, CP = 9.5%, TDN = 66.1%; yr 2, CP = 9%, TDN = 69.8%), (ii) field grazing swathed barley hay (SB) cv. ‘Ranger’ (yr 1, CP = 13.2%, TDN = 56.8%; yr 2, CP = 10%, TDN = 61.9% and (iii) barley hay bales fed in drylot pens (DL) cv. ‘Ranger’ (yr 1, CP = 13.1%, TDN = 53.2%; yr 2, CP = 8.2%, TDN = 55.2%). Forages were allocated on a 3-4 d interval in SC and SB systems. The specific objectives were to compare crop yield and agronomy, beef cow performance, reproductive efficiency and system costs in experiment 1 (EXP 1); and ruminal pH, SCFA and ammonia concentration in experiment 2 (EXP 2). In EXP 1, 60 dry, pregnant Black Angus cows (yr 1, 644 kg ± 72 kg; yr 2, 672 kg ± 66 kg) at mid-gestation, stratified by body weight (BW) were allocated to 1 of 3 replicated (n=2) winter grazing treatments for 77 d in yr 1 and 78 d in yr 2. Increases in rib fat were greater (P = 0.02) for SC cows compared to SB cows (1.6 vs 0.3 mm, respectively). Estimated DMI was lower (P < 0.01) for SC cows (9.1 kg/d) compared to SB and BH cows (14.3 and 13.0 kg/d, respectively) which did not differ (P > 0.05) from each other. Calves born to cows grazing SC were heavier (P ˂ 0.01) at birth compared to calves from SB and BH cows (43, 40 and 40 kg, respectively). Changes in cow BW and average daily gain (ADG) were lower (P < 0.01) and negative in year 2 (BW change, 23.8 and -4.9 kg; ADG, 0.3 and -0.1 kg for yr 1 and 2, respectively). The number of calves born in first 21 d was 44% higher (P < 0.01) in yr 1 compared to yr 2. Economic analysis revealed that total costs were greatest for BH ($2.75/cow/d) compared to SC and SB ($2.06 and $2.00 cow/d, respectively) systems. In EXP 2, 9 cannulated beef heifers were cycled through the 3 winter systems concurrently within EXP 1, in a replicated 3 × 3 Latin square design, for 63 d to evaluate effect of forage type and day of allocation on rumen fermentation. Results from EXP 2 indicated an increase (P < 0.01) in minimum pH of cannulated heifers from d 1 to d 3 of forage allocation in SC and SB systems. Lower (P < 0.01) minimum and mean pH and increased duration and area (P < 0.01) under pH 5.8 were observed in yr 2 in SC and yr 1 in SB. In yr 2, total SCFA, acetate and propionate concentration increased (P < 0.01) in SB heifers, but butyrate concentration increased (P < 0.05) in SC heifers compared to yr 1. Ruminal fermentation was unaffected (P > 0.05) by day of forage allocation and yr of study in BH system. Results from EXP 1 and EXP 2 suggest that both SC and SB systems are cost effective alternatives to BH system, and do not negatively affect cow reproductive performance following winter grazing. However, yearly differences in weather and seeding date of forages can have a profound effect on nutrient composition of forages, and can cause variations in cow performance and rumen metabolism during the period of extensive winter grazing.
4

Les aspects socio-economiques des champs fourragers du projet promotion élevage Atacora cas des sous-préfectures de Kouande et Ouassa-Pehunco /

Gibigaye Adam, Boukary. Nagnimi Idrissou, Bio Imorou. January 1991 (has links)
"Mémoire de maitrise"--Université nationale du Bénin, 1991. / Includes bibliographical references (leaves 64-65).
5

Influence of livestock grazing within piospheres under free range and controlled conditions in Botswana

Mphinyane, Wanda Nchidzi. January 2001 (has links)
Thesis (Ph. D.)(Plant Production)--University of Pretoria, 2001.
6

Productivity and diseases of Saanen, indigenous and crossbred goats on zero grazing

Donkin, Edward Francis. January 1997 (has links)
Thesis (Ph. D.)--Medical University of Southern Africa, 1997. / Includes bibliographical references.
7

An investigation into the feeding behaviour and diet selection of the domestic horse

Cairns, Marie Clare January 2002 (has links)
No description available.
8

The effect of breed of dairy cow on oestrous behaviour, fertility and animal performance

Crawford, A. D. January 2002 (has links)
No description available.
9

Timber growing versus grazing on the non-forested areas of the McDonald forest /

Baker, Lyle Albert. January 1941 (has links)
Thesis (M.F.)--Oregon State College, 1941. / Typescript. Includes bibliographical references (leaves [52-55]). Also available on the World Wide Web.
10

Group tenure in the administration of public lands

Loomer, C. W. January 1947 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1947. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 178-185).

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