Ecology and Utilization of Desert Shrub Rangelands in Iraq by D.C.P. Thalen

By D.C.P. Thalen

A. Scope of the examine five B. heritage 6 C. barren region shru b rangelands 7 1. Definition 7 2. international distribution of wasteland shrub plants eight three. source price of wasteland shrubs 12 D. Iraq, a short advent to the rustic 14 1. setting 14 2. inhabitants 17 three. Land use 18 four. plants 19 I. advent I. A. Scope of the examine The degradation of renewable normal assets within the arid components of South West Asia has develop into a question of significant crisis. in the neighborhood the consequences of careless utili­ zation of the land and its assets have been felt in the past. it really is, besides the fact that, in basic terms fairly lately that the gravity of the placement is being more often than not and completely realised. it truly is now good understood that motion is needed to save lots of what's left and doubtless to revive what was there. Such motion calls for association and coordination, yet in particular wisdom of the current kingdom of the assets and the effect of usage procedures. a part of this information is already on hand. the issues aren't restrained to this a part of the world's arid lands, yet exist both good somewhere else. specifically over the past a long time an ever expanding variety of stories were released facing elements of arid area examine. challenge analyses have been via compila­ tions of data particularly fields (White 1956; Hills 1966; Mc Ginnies et al. 1967, 1969, 1971;KauI1970;Clawsonetal.

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G. Medicinal Plants (Al-Rawi & Chakravarti 1964) and Weeds (Hassawy et al. 1968). II. c. 2. Vegetation descriptions and ecological studies A number of scientists listed in the previous section has not only collected and identified specimens, but also given descriptions of vegetation in relation to environment, brief and general (Nabelek 1923) or lengthy and detailed (HandelMazzetti 1914b). The last authors account is the first comprehensive vegetation description of the desert areas of Iraq. He distinguished in the plains of Mesopotamia (versus the mountains of Kurdistan) deserts in the south and steppes in the north.

A. l. Field data collection III. A. a. Inventory of the desert rangeland vegetation Between April 1970 and June 1973 about 40 fieldtrips ranging from three days to two weeks in duration provided field observations and other inventory data. The desert areas were systematically traversed and broadly surveyed along routes selected from available small scale maps. Repeated visits were often necessary to cover the seasonal aspects. Fifteen one-day trips were especially made for production measurements.

Cm) Jan. Febr. Mar. Apr. May. June July Aug. Sept. Oct. Nov. Dec. 00 Time of the day Figure IV-3. Soil temperatures at different depths, recorded over 48 hrs in mid-summer (6 8 August 1972) in a sandy soil in the Ukhaidir - Abu Dibbis area. decrease with increasing depths. This can also be seen from Fig. IV - 3. This figure shows the result of 48 hours continuous hourly measurements in a dry sandy soil during the hot summer season. 2°C. O°C all in the first SO cm. SoC all in the first 30 cm (UNESCO 1975).

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