Spatial Variability of Soil Fertility Characteristics at the Kalinga Ela in Sewagama Agrarian Service Center in the Parakrama Samudra Irrigation Scheme in Polonnaruwa
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Spatial Variability of Soil Fertility Characteristics at the Kalinga Ela in Sewagama Agrarian Service Center in the Parakrama Samudra Irrigation Scheme in Polonnaruwa