The Tropical Agriculturist The Agricultural Journal of Ceylon November 1929

The lower drainage in 1928 notwithstanding the higher rainfall is doubtless due to the settling down and the greater degree of compactness of the soil in the pots. [...] Regarding the variation in drainage from individual pots it will be noted from table i that in the case of the non-cropped pots the drainage from the muriate of potash and superphosphate pots is still highest and that the sulphate of potash pot but not the control as in 1927 has the lowest drainage percentage. [...] The growth of the crop in the sulphate of ammonia pot has not been very successful probably owing to the effect of the continued application of this manure-in increasing the acidity of the soil. [...] The amounts of fertilising costituents in the drainage waters from the uncropped pots are much greater than those from the cropped pots and in the case of the former there is almost a direct proportionality between the quantities of fertilising constituents in the drainage waters and the amounts of the latter and of the rainfall. [...] The results of leaching trials started in 1927 and continued during 1928 generally confirm the conclusions obtained from the 1927 data especially with regard to the relationship between drainage and rainfall the amounts of fertilising constituents in271 the drainage waters and the quantities of the latter and the prsence of large amounts of nitrate nitrogen and lime in the drainage waters fr