JOURNAL OF THE SOIL SCIENCE SOCIETY OF SRI LANKA

VOLUME 16.  
Rice Straw Silica – Solubility Characteristics and use as a Silicon Source in
Paddy Cultivation
W. M. A. D. B. Wickramasinghe
1
Exploring Tank – Village Farming System in the Dry Zone
P. B. Dharmasena
17
Spatio – temporal Variability of Potential Evapotranspiration in Sri Lanka and
its application in Agricultural Planning
M. A. K. Munasinghe and R. D. Chithranayana
29
Identification and Mapping of Spatio – temporal Variability of Growing Season
Characteristics in the Wet Zone of Sri Lanka
R. D. Chithranayana, M. A. K. Munasinghe and B. V. R. Punyawardena
43
Effect of Continuous Application of Organic Manure on Sweet Potato Yield and
Nutrient Build up of an Alluvial Soil
S. D. R. Wanniarachchi and H. D. Jayawickrama
55
Impact of Long – term Rice Cultivation on Potassium Availability in Alfisols
K. M. A. Kendaragama, K. M. Seneviratne Banda and P. T. Bandara 63
63
Calcium, Magnesium and Micronutrient Status of Citrus Growing Soils of
Lower Uva Region of Sri Lanka
J. D. H. Wijewardena
73
Heavy Metal Retention by Eppawela Rock Phosphate and Sri Lankan Dolomitic Limestone
S. P. Indraratne, A. G. A. Gayani and M. A. T. D. Marasingha
81

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