Research Article

Effect of Nitrogen and Periphyton Extract on the Growth of Nostoc sphaericum in Cultures

Figure 6

Graphic profiles of the estimated marginal means (EMMs) for data of chlorophyll-a of N. sphaericum thalli. The differences plotted to support the proposed objectives for each experimental condition of nitrogen (solid or dotted lines) and periphyton extract (x-axis) are statistically significant ( ).
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