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Karakteristik Unsur Hara dan Produktivitas Primer Fitoplankton Pada Perairan Tipe Tertutup dan Terbuka di Danau Bekas galian Pasir;
The aimed of this research were to investigated characteristics element and value of primary productivity in Lake in district Gekbrong as result of activity of phytoplankton photosynthesis and its relation with the value of physic and chemical factors of water. The sampling location determined depends on various activities in each sampling location. Primary Production was measured by the Oxygen Method were two bottles with a given concentration of phytoplankton are suspended at the depth from which the samples were obtained. The other analysis would be conducted to measurement the physic and chemical factors of water, such as the temperature, pH, Dissolved Oxygen, Secchi Disk visibility, total Fe, NO2
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