This study was carried out at the Agricultural Scientific Research center In Sweida -
GCSAR to study the effect of potassium sulfate and organic manure on some of soil
characteristic in addition to tree growth vigor and fruit traits of Starking del
icious apple
cultivar. The results revealed significant effect in reducing the (pH) of the soil in the three
treatments; potassium sulfate fertilization, organic manure fertilization and application of
potassium sulfate and organic manure together which were (6.608), (6.708) and (6.558),
respectively, in the comparison with the control (6.768). In addition, significant differences
were shown in the (EC) between the former treatments (0.1532 ds / m), (0.1692 ds / m) and
(0.0937 ds / m) compared to the control (0.2217 ds / m). Concerning growth vigor and fuit
traits, the results showed a significant increase in the average of shoot length in the
previous treatments (66.43, 77.33 and 71.37 cm, respectively), compared to the control
(59.37 cm), while showed a significant increase in leaf area in organic manure treatment
and potassium sulfate with organic manure together (35.54 and 37.21 cm 2, respectively),
compared to the control (30.54 cm 2). The results of analysis of variance in fruit firmness
showed higher significant variation of potassium treatment (8.477 kg / cm 2) than the
other treatments which, also revealed significant increase of total soluble solids
(16.82%,15.2% and15.37%,respectively) compared to the control (14.23%), and a
significant increase in total sugars and in percentage of treatable acidity. Consequently, the
result showed that the addition of soil fertilizers treatment contributed to improve some of
soil characters, tree growth vigor and some of the quantitative and qualitative traits of
apple fruits.
The aim of this study was to determine some physical, chemical and microbiological density (fungi – bacteria) of a Pine forest soil in the coastal region (Al-Ballotiah forest, Banias) where Quercus calliprinus is the main dominant plant.
Three soi
l profiles were taken and their morphological characteristics were determined, the thickness of accumulated organic matter and GPS data were also recorded.
For physical and chemical analysis, samples from each profile horizon were taken and air- dried, whereas for the microbial diversity analysis, samples were taken twice in autumn and spring; and transported and stored at 4C.
The results showed that the studied soil belongs to Mollisols, Entisols with A-AC-C1-C2 profile types. Our results also showed that the soil depth was (153-150 cm) and rich in calcium carbonate.
Soil pH is alkali, where the pH ranged between (7.91-9.13) that increased bacterial activity and density in organic litter and mineral soil, which was related with the organic matter ratio. This ratio decreased significantly with soil depth that affected the microorganisms density which behave in the same manner. However, an increasing of microorganisms density was detected in spring especially in first horizon.
The aim of current research was to study some diagnostic characteristics
/morphological, physical, chemical/and the origin structureofforest soils in Syrian coastal
region. In addition to estimation of microbial activity of some microbial groups/ba
cteria,
fungi, actinomycete/ to establish a general view of these soils.
Two complete sections were prepared in the considered soils /Safita-Tartous/
andsamples were taken after the soils sections description for diagnostic characterization.
The results showed that the soil pH was between neutral and tiny basic and because
of the richnessof the studied soil by calcium carbonate. However, the highest percentage of
organic matter in all sections were concentrated in the surface horizon and was decreasing
with depth. Our results also showed that the microbial activity was positively correlated
with the content of the organic matter and negatively with the depth, so the total number of
bacteria and fungi was decreasing in the under surface horizon. A
muddymetamorphosedhorizon (Bm) was formed in the two sections.
The present study aimed to evaluate the ecological and phytosociological
status of panicum turgidum under the environmental conditions of the eastern
province of Kingdom of Saudi Arabia. 48 stands (each of 25 m2, i.e. 1x25 m)
were randomly selecte
d from three locations (Riyadh, Ogair and Damam)
which represent the optimum habitat of P. turgidum. The obtained results
showed that the dominated plant species associated with P. turgidum were
Cyperus conglomertus, Eragrostis barrelieri, Haloxylon persicum, Haloxylon
salicornicum, Heliotropium bocciferum, Launaea mucronata, Leptadenia
pyrotechnica, Monsonia nevia and Plantago ovata. P. turgidum, and is
recommended as an important grazing vegetation in deep sand soil. Soil salinity
(ECe), soil PH, CaCO3, organic matter, soil texture (Sand %) and soil moisture
(FC) were the most limiting soil properties affecting P. turgidum distribution
naturally at the studied area.
