Effect of Clay Content in Soil on Boron Uptake and Yield of Wheat1
- R. Keren,
- F. T. Bingham and
- J. D. Rhoades2
The effect of total B content in soil on B uptake by wheat (Triticum aestivum L.) and its effects on yield were studied for three soil-sand mixtures at soil-to-soil + sand ratios of 1:3, 2:3, and 1. The results indicate that the higher the clay content of a soil, the lower is the B activity in solution for any given amount of B added. It was suggested that the soil adsorption sites act as a pool to which B can be stored or removed depending on the change in solution B concentration in soil. The B uptake by the plants is higher as the sand content increases, for any total amount of B added. However, the experimental results from all three soil-sand mixtures lie on the same line when the B content in the shoot is plotted against B activity in soil solution (r2 = 0.9695). The dry matter of the plants was decreased with both an increase in total amount of B added and an increase in the sand content for any given amount of total B. As found for B uptake, the relative dry matter weight and the relative yield values lie on the same linear line when they are plotted against B activity in soil solution from all three soil systems. This indicates that the yield responds to B activity in soil solution only.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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