Journal
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
Volume 50, Issue 8, Pages 1044-1062Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00103624.2019.1603307
Keywords
Boron; testing methodology; soil fertility; plant nutrition; fruit
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Funding
- Research Fund of the University of Uludag, Bursa, Turkey [KUAP(Z)-2013/90]
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This study was conducted to investigate the various boron fractions in olive tree grown soils. The correlations between boron fractions in leaves, fruits and soil properties were examined. For this purpose cv Gemlik olive (Olea europaea L.) orchards were visited. Soil samples from 0-30 cm and 30-60 cm deep, the leaf and fruit samples were collected. The greatest proportion of total soil boron is present in residual form (85-88%). It is followed by organically bound B (2.84-4.50%), specifically adsorbed on soil colloid surfaces (0.93-1.31%), oxides (manganese oxyhydroxides, amorphous Fe and Al oxides, crystalline Fe and Al oxides) bound B (7.27-8.31%). The smallest one readily soluble (extracting plant available) boron values were composed of only 0.40-0.50% of total boron ranging. To determine readily soluble boron five different extraction solutions were in the order Hot water > 0.01 M CaCl2 > 1 M NH4OAc > 0.1 M KCl > 0.005 M DTPA. Fruit boron concentration and soil boron fractions showed close correlations than leaf boron concentration.
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