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Topic IV - Sampling and processing of data


Phytosociological survey and pasture-range evaluation

The phytosociological survey
Realisation
Evaluation of pastures (range grazing)
Evaluation for management
Control of ecological changes
Conclusion

Environmental monitoring in Africa

Bibliography

Presenting the results of integrated surveys by computer mapping

1. Introduction - The need for planning-relevant information
2. The concept of cellular mapping
3. The concept of multi-source data
4. Extraction of planning-relevant information
5. Presentation of results
6. Computer-mapping and spectral pattern recognition

Modelling primary production

Introduction
Special problems in desert research and modelling
Modelling primary production

Potential primary production of unirrigated land in the Sahel

Introduction
Bibliography

Model studies on actual and potential herbage production in arid regions

Aims
Results
Concluding remarks

Mathematical analysis of surveys of vegetation in the Sahelian zone

A. processing of the surveys
B. Pluriannual variations

Review of the discussions

Review of discussions
1. Evaluations through mapping with computer assistance
2. Surveying the environment
3. Simulation models
4. Vegetation surveys
5. Collection data and sampling techniques

Under the Chairmanship of Dr. I. MOHAMED, Director of the Federal Livestock Department of Nigeria.

4.1. Sampling procedures, selection of sample sites, number, size of samples, specific requirements of complex and sparse vegetation. Format of records.

4.2. Ordination and analysis of data covering non-statistical and statistical methods; computer capabilities.

4.3. Data storage.

4.4. Mathematical modeling as a means of predicting change and translating primary data into far example stocking rates

Chairman: I. MOHAMED
Rapporteur: H.N. LE HOUEROU
Discussion leader: P. BOEKER

COMMUNICATIONS

K. VOLGER; J.C. BILLE; F. PENNING DE VRIES; H. VAN HEEMST; C. DE WIT; B. NORTON; B. LUNDHOLM; A. GASTON.


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