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Effect of Composted Organic Matter on Boron Uptake by Plants

^a Gilat Experimental Station, Agricultural Research Organization Mobile Post Negev, Israel
^b Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
^c The Seagram Center for Soil and Water Sciences, Faculty of Agricultural, Food and Environmental Quality Sciences, P.O. Box 12, The Hebrew Univ. of Jerusalem, Rehovot 76100, Israel

View larger version (31K): [in a new window]   Fig. 1. Adjusted B concentration in soil solution at a water content of 30% (w/w) after 2 d of equilibration (A) and after harvest of the plants (B) vs. the COM content of the soil–sand–COM mixture at four levels of B application (B concentration was measured in the saturated paste extract and adjusted to a water content of 30% using Eq. [2]).

View larger version (20K): [in a new window]   Fig. 2. A comparison between adjusted B concentration in the soil solution (adjusted to a water content of 30%) after 2 d of equilibration and B concentration calculated using Eq. [1], [2], and [3] and the adsorption coefficients given in Table 1. The calculation was performed for the same pH, solution-to-soil ratio, and total added B as in the plant growth experiment.

View larger version (23K): [in a new window]   Fig. 3. Boron concentration in pepper leaves vs. COM content in the soil–sand–COM mixture at four levels of B application.

View larger version (21K): [in a new window]   Fig. 4. Boron concentration in pepper leaves vs. B concentration in the soil solution adjusted for a water content of 30%, after 2 d of equilibration, and B concentration evaluated using Eq. [1], [2], and [3] and adsorption coefficients given in Table 2. The calculation was performed for the same pH, solution to soil ratio, and total B as in the plant growth experiment (the line is based on the evaluated values).