Hema system : traditional conservation of plant life in Saudi Arabia
Other Title(s)
الأحمية كنظام تقليدي للحفاظ على الحياة النباتية بالمملكة العربية السعودية
Joint Authors
Zahran, Mahmud Abd al-Qawi
Yunus, Husayn Ahmad
Source
Journal of King Abdulaziz University : Sciences
Issue
Vol. 2, Issue 1 (31 Dec. 1990), pp.19-41, 23 p.
Publisher
King Abdulaziz University Scientific Publishing Center
Publication Date
1990-12-31
Country of Publication
Saudi Arabia
No. of Pages
23
Main Subjects
Topics
Abstract EN
Traditional conservation of plant life by the hema system has been successfully achieved in the SW mountainous region of Saudi Arabia.
The unwritten, but very respectable rules of the tribe are, in fact, the most effective factor that keeps on the running of the system since pre-Islamic era.
Three representative hemas, namely: Hema Bani Sar, Hema Thamala and Hema Sakhayet, have been studied ecologically.
The plant cover and soil characteristics in- and outside the hemas (Ahmia) vary considerably.
Overgrazing outside the hemas has bad effect not only on the plant life but also on the soil development.
Inside the hemas, the condition of the plants differ according to the state of grazing.
In the main channel and on the lower zones of the side-slopes of Hema Sakhayet and Hema Thamala, where grazing is allowed only for cattle, the aerial parts of the grazeable plants (mainly grassesa) re absent.
On the higher zones of the slopes,t he grassesa nd other plants grow well.
In Hema Bani Sar, where grazing is strictly prohibited for all livestock, the vegetation, in general, is relatively ricker and the soil shows no symptoms of erosion.
American Psychological Association (APA)
Zahran, Mahmud Abd al-Qawi& Yunus, Husayn Ahmad. 1990. Hema system : traditional conservation of plant life in Saudi Arabia. Journal of King Abdulaziz University : Sciences،Vol. 2, no. 1, pp.19-41.
https://search.emarefa.net/detail/BIM-400467
Modern Language Association (MLA)
Zahran, Mahmud Abd al-Qawi& Yunus, Husayn Ahmad. Hema system : traditional conservation of plant life in Saudi Arabia. Journal of King Abdulaziz University : Sciences Vol. 2, no. 1 (1990), pp.19-41.
https://search.emarefa.net/detail/BIM-400467
American Medical Association (AMA)
Zahran, Mahmud Abd al-Qawi& Yunus, Husayn Ahmad. Hema system : traditional conservation of plant life in Saudi Arabia. Journal of King Abdulaziz University : Sciences. 1990. Vol. 2, no. 1, pp.19-41.
https://search.emarefa.net/detail/BIM-400467
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 40
Record ID
BIM-400467