Abstract
A sand culture experiment was carried out to study the Ca-B interaction growing radish (cv. French breakfast) as
a test crop under green house conditions. Calcium was applied at the rate of 80, 200, and 500 mg Ca L-1
as
CaCI2
• 2H2
0 and boron was applied at the rate of 0.05, 0.25, 1.0 and 5.0 mg B L'1
as H3B03 in different
combinations along with a basal dose of modified complete nutrient solution based on the Long Ashton Formula.
The experiment was laid out in a randomized complete block design with 4
3
factorial arrangement and replicated
three times. Results revealed that maximum fresh and dry matter yields were recorded at 500 mg Ca and 1 mg B
L-1
, corresponding to Ca/B ratio of 500:1 in the nutrient solution. The concentration of Ca and B in radish plants
increased with increasing the respective levels of these elements in the nutrient solution, but the total uptake of
these two elements showed a close similarity to growth response of radish plants, indicated total uptake was a
useful but alternative way in determining the effect of Ca-B on the response of plant's content of these two
elements. Moreover, with decreasing the CaiB ratio in nutrient solution the ratio in tops and roots linearly
decreases and showed significantly positive correlations, while, an optimum CaiB ratio in plant tops and roots
were found to be 241 and 188, respectively. The values for both plant parts found to be normal in predicting the
maximum yield of radish plants.
