FLOODED-BENCH IRRIGATION: EFFECT OF IRRIGATION FREQUENCY AND TYPE OF POTTING SOIL ON GROWTH OF CODIAEUM AND ON NUTRIENT ACCUMULATION IN THE SOIL
In all treatments the same nutrient solution was used. At the end of the experiment the total quantities of N, P, and K found in the potting soil of the treatments with the most frequent watering were higher than in those with the lowest frequency.
In the upper 4-cm layer of the soil column, which had a total height of 12 cm, an EC (in a 1:1.5 vol. extract) of 5.5 mS/cm was found; in the bottom 4-cm layer the EC was 0.8 mS/cm. This illustrates the strong salinization of the top layer of the potting soil.