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Now showing items 31-40 of 77
Edaphic properties and soil cyanobacteria of South Western Saudi Arabia.
(
Qatar University
, 1997 , Article)
Three sites at each of five localities, in the South Western Region of Saudi Arabia were surveyed during 1992, for their soil physico-chemical properties, and cyanobacterial communities. The soils were moderately calcareous, ...
The Antibiotic Activity Of Some Aquatic Plants And Algal Extracts From Jordan
(
Qatar University
, 1991 , Article)
The antimicrobial activity of the extracts of three fresh water green algae, four marine green algae, two brown marine algae and five red marine algae from the Jordanian part of the Aqaba Gulf, together with four aquatic ...
Zinc Tolerance and Accumulation in Aspergillus oryzae Penicillium citrinum and Rhizopus stolonifer isolated from Saudi Arabian Soil
(
Qatar University
, 1997 , Article)
Aspergillus oryzae, Penicillium citrinum and Rhizopus stolonifer isolated from Taif soil, Saudi Arabia could survive in a liquid medium containing up to 500 ug/ml Zn. Aspergillus oryzae and Penicillium citrinum were more ...
Sulphur Oxidation In Saudi Arabian Agricultural Soils
(
Qatar University
, 1996 , Article)
Laboratory studies were conducted to determine the oxidation of elemental sulphur in eight localities of Saudi Arabian soils. The effect of sulphur application on related properties of calcareous soils in Saudi Arabia was ...
Microbial utilization of some agricultural And agro-industrial waste products for the Production of single cell protein (scp).
(
Qatar University
, 1993 , Article)
The dried residues of com crop (com straw) were hydrolysed by 0.5 NH2SO4. Saccharomyces cerevisiae has been allowed to grow on media containing different concentrations of the com straw hydrolysate (CSH). The optimal ...
Calcium Carbonate Content, Some Chemical And Physical Properties Of The Sudan Gezira Soils And Their Implications
(
Qatar University
, 1991 , Article)
Eight soil pcdons representing a range of aridisols, vertisols and recent alluvium were studied for various chemical and physical properties. Generally the soils were clayey except the recent alluvium which was loamy but ...
The relationship between heavy metal concentration and soil mycoflora in the Gizan region, Saudi Arabia
(
Qatar University
, 1997 , Article)
Soil samples were collected from different places from the Gizan region, Saudi Arabia, and analyzed mechanically and chemically for mineral content. The soils were highly alkaline and sandy in texture in all cases. The ...
Plant Population Density Effects On Yield Of Sorghum Grown In A Dry-Land Farming System
(
Qatar University
, 1996 , Article)
Plant population studies in arid regions are very sparse and not well documented. A prerequisite in growing a successful sorghum (Sorghum bicolor [L.] Moench) crop is to obtain an adequate plant population. The response ...
Changes In Biomass Gain, Protein Content And Hormonal Levels In Wheat Kernels In Response To Soil Drench With Sodium Salicylate
(
Qatar University
, 1992 , Article)
Drenching of soil with sodim salycylate (800,4000 and 8000mg/l) increased grain f. wt. and d. wt. Protein content was increased in grains at days 23 and 60 with 800 mg/1 salicylate. With higher doses "4000 and 8000mg/l ...
Growth and production of tropane alkaloids by cell suspension cutures of hyoscyamus albus L.
(
Qatar University
, 1990 , Article)
Cell suspension of Hyoscyamus albus L. were investigated for growth and production of tropane alkaloids in three different media. The effects of sucrose concentration and initial pH were also studied. 2,4- Dichlorophenoxyacetic ...