Hassanin,A.H.E.; Manal, A.AbdAlla;Ghada,A.Abdel-kader and Salwa,S.El-Sayied. ( 2012). Background levels of total and available Boron content in some soils of Egypt.J. of App. Sci., volum 27(3):195-216 2012.
Abstract: The investigation is mainly carried out to through light on the background levels of total and available boron content in some Egyptian soils. Nineteen soil profiles were collected to represent the sandy, Nile alluvial, lacustrine and calcareous soils of Egypt. Data reveal that the total boron content varied from 11.8 to 25.1; 44.7 to 65.5; 71.4 to 97.3 and 40.5 to 52.3 µg g-1 in the sandy, Nile alluvial, lacustrine and calcareous soils, respectively. Boron content can be arranged according to the soil types in the order: Lacustrine > Nile alluvial > calcareous > sandy soils
Also, hot water soluble boron (HWB) recorded a wide variation in their contents. Their amounts are varied between 0.9 to 3.2; 0.5 to 1.2; 1.4 to 5.2 and 0.3 to 0.7 µg g-1 in the sandy, Nile alluvial, lacustrine and calcareous soils, respectively. Comparing the obtained level of HWB with critical levels for sensitive crops, the studied soils of lacustrine and Wadi El-Natrun soils contain high concentration of available boron which are unsafe levels of boron casing death of crops and plants. For the factors affecting total and HWB in the studied soil types, the correlation coefficients were calculated. The values reveal that the total and available boron contents are almost dependent on soil parent material and its main properties. The statistical measurements, i.e. weighted mean (W), trend (T) and specific range (R) of total boron were computed and interpreted in terms of soil genesis and formation.
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