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Now showing items 31-40 of 113
The Availability Of Iron In Soil And Plants Treated With Organic And Inorganic Fertilizers In The Jordan Valley
(
Qatar University
, 1995 , Article)
This paper deals with the rcults of a study carried out on "Phoseolus vulgaris - Wed" as an indicator of chlorosis. The study took place between July 1990 and July 1992, and for two crop seasons each year. Six kinds of ...
Attenuation Of Bacillus Cereus Spores By Different Factors
(
Qatar University
, 1993 , Article)
The spore suspension of Bacillus cereus K] ]s was exposed to different concentrations of NaCl. NaNo3 and NaNC>2 as curing agents. The spores were able to tolerate 10% NaCl. Up to 4%, NaNC>3 had little or minor effects on ...
Production Of Extracellular Enzymes By Some Soil Yeasts
(
Qatar University
, 1997 , Article)
This study investigated the ability of soil yeasts, Geotrichum candidum, Geotrichum capitatum and Williopsis californica to produce extracellular enzymes (amylase, cellulase and protease) in vitro compared with that of a ...
Mycoflora and mycotoxins of sunflower(helianthus annuus l.) Seeds in egypt 1. Sugar fungi and natural occurrence of mycotoxins
(
Qatar University
, 1986 , Article)
Eighteen genera and sixty-three species, in addition to three varieties were isolated from thirty six samples of sunflower seeds collected from different places in Egypt. Aspergillus and Penicillium followed by Rhizopus ...
Plant growth, metabolism and adaptation in relation to stress conditions. Vi. Differential effects of sodium sulphate on growth and element content of phaseolus vulgaris and zea mays
(
Qatar University
, 1989 , Article)
Seeds of Phaseolus and Zea were germinated and then cultured either in Hoagland nutrient solution (1/4-strength) by itself or in combination with different concentrations of Na^SC^. Salinization induced, in general, varied ...
Nature Of The Aflatoxin B, - Induced Inhibition Of Photosynthesis In Chlorella Fusca (Chlorococcales, Chlorophyta)
(
Qatar University
, 1994 , Article)
Treatment with Aflatoxin E^ (AFBi) resulted in inhibition of photosynthetic oxygen evolution in Chlorella fusca Shih.et Krauss. Treatments also induced a marked reduction of both chlorophyll and carotenoid contents. ...
Effect of Fertilizer Application on Diversity and Production of Weeds in Crop-Less Fields
(
Qatar University
, 1993 , Article)
The present study aims at assessing the effect of fertilizer application (with monofactorial deficiency of nitrogen, phosphorus, potassium and lime) on the diversity and production of weeds in cultivated but crop-less ...
Record of a fruiticose lichen, Ramalina farinacea (L.) Ach. for Qatar
(
Qatar University
, 1997 , Article)
Lichens are thallophytic lower plants. Ramalina farinacea (L.) Ach., family Ramalinaceae, is the only fruticose lichen recorded in Qatar. It occurs on stony terrain bordering the coastline in association with other 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 ...
Mycoflora of cotton flowers and fungi associated with boll rot in egyptian cotton. I-saprophytic fungi
(
Qatar University
, 1987 , Article)
Isolation of fungi was made for nine weeks post flower opening for two consecutive years from young floral segments and capsule components, on glocuse and cellulose agar media.
The capsule components possesed fewer fungi ...