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Book 1981

Autor: Stelfox, J.G. Peden, Donald G.

Describes the organization, objectives and results of the aerial survey programme of the Kenyan Rangeland Ecological Monitoring Unit from 1976 to 1979, with particular reference to the methodology used, animal population estimates, esp. herbivores, and reliability of aerial survey data in terms o...

Enlace original: https://cgspace.cgiar.org/handle/10568/4221

Investigación en Agricultura
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Stelfox, J.G. ,  Peden, Donald G. ,  [The aerial survey programme of the Kenya rangeland ecological monitoring unit: 1976-79] ,  The aerial survey programme of the Kenya rangeland ecological monitoring unit: 1976-79
Journal Article 1986

Autor: Eshete, A.

Discribes a new sighting device that improves the accuracy of data collection during low-level aerial surveys. Shows the flight pattern used.

Enlace original: https://cgspace.cgiar.org/handle/10568/10924

Investigación en Agricultura
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Eshete, A. ,  [Un outil novateur pour les recensements aeriens] ,  Un outil novateur pour les recensements aeriens
Book Chapter 1986

Autor: Grimsdell, J.J.R. Bille, Jean-Claude Milligan, K.

Discusses six alternative methods for estimating livestock populations based on aerial surveys, mentioning two main factors which affect the resulting population estimates, particularly sampling fraction and the degree of aggregation or clumping of the population being sampled.

Enlace original: https://cgspace.cgiar.org/handle/10568/10828

Investigación en Agricultura
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Grimsdell, J.J.R. ,  Bille, Jean-Claude ,  Milligan, K. ,  [Autres methodes de recensement aerien du betail] ,  Autres methodes de recensement aerien du betail
Journal Article 1987

Autor: Bourn, D.M. Denda, I. Ridder, N.A. de Wagenaar, K.T. Wint, W.

Discusses, based on aerial surveys taken before and after the drought, the magnitude of population changes, both human & animal, that took place in west Central Niger during the drought and how the drought has affected different ethnic groups. Includes data on estimates of livestock population & ...

Enlace original: https://cgspace.cgiar.org/handle/10568/10923

Investigación en Agricultura
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Bourn, D.M. ,  Denda, I. ,  Ridder, N.A. de ,  Wagenaar, K.T. ,  Wint, W. ,  [Secheresse et exode pastoral au Niger] ,  Secheresse et exode pastoral au Niger
Book 1981

Autor: Jolly, G.M.

Reviews procedures for obtaining reliable information on animal populations, other ecological features and land use generally from low-flying aircraft by direct observation or conventional photography, with reference to types of sampling unit, and the relative merits of unstratified systematic an...

Enlace original: https://cgspace.cgiar.org/handle/10568/4214

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Jolly, G.M. ,  [A review of the sampling methods used in aerial survey] ,  A review of the sampling methods used in aerial survey
Journal Article 2001

Autor: Gerard, Bruno G. Hiernaux, Pierre H.Y. Muehlig-Versen, B. Buerkert, Andreas

Little is known about the residual effects of crop residue (CR) and phosphorus (P) application on the fallow vegetation following repeated cultivation of pearl millet [Pennisetum glaucum (L.) R. Br.] in the Sahel. The objective of this study, therefore, was (i) to measure residual effects of CR, ...

Enlace original: https://cgspace.cgiar.org/handle/10568/33108

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Gerard, Bruno G. ,  Hiernaux, Pierre H.Y. ,  Muehlig-Versen, B. ,  Buerkert, Andreas ,  [Destructive and non-destructive measurements of residual crop residue and phosphorus effects on growth and composition of herbaceous fallow species in the Sahel] ,  Destructive and non-destructive measurements of residual crop residue and phosphorus effects on growth and composition of herbaceous fallow species in the Sahel
Book 1981

Autor: Newsome, A.E. Dudzinski, M.L. Low, W.A.

Examines possible bias in aerial surveys of animals due to dispersion, using extensive data on cattle; and describes ways to adjust estimates.

Enlace original: https://cgspace.cgiar.org/handle/10568/4218

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Newsome, A.E. ,  Dudzinski, M.L. ,  Low, W.A. ,  [Measuring bias in aerial surveys due to dispersion of animals] ,  Measuring bias in aerial surveys due to dispersion of animals
Journal Article 1987

Autor: Bourn, D.M. Denda, I. Ridder, N.A. de Wagenaar, K.T. Wint, W.

Discusses, based on aerial surveys taken before and after the drought, the magnitude of population changes, both human & animal, that took place in west Central Niger during the drought and how the drought has affected different ethnic groups. Includes data on estimates of livestock population & ...

Enlace original: https://cgspace.cgiar.org/handle/10568/4507

Investigación en Agricultura
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Bourn, D.M. ,  Denda, I. ,  Ridder, N.A. de ,  Wagenaar, K.T. ,  Wint, W. ,  [Where have all the livestock gone?] ,  Where have all the livestock gone?
Book 1981

Autor: Watson, R.M. Tippet, C.I.

Discusses the role of light aircraft remote sensing methods using examples of different surveys carried out by the Resource Management and Research (RMR) firm in nine African countries and over international waters from 1968 to 1979.

Enlace original: https://cgspace.cgiar.org/handle/10568/4228

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Watson, R.M. ,  Tippet, C.I. ,  [Examples of low-level aerial surveys conducted in Africa from 1968 to 1979: One firm's experience] ,  Examples of low-level aerial surveys conducted in Africa from 1968 to 1979: One firm's experience

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