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Chemical and Biological Technologies in Agriculture
Fig. 9 | Chemical and Biological Technologies in Agriculture

Fig. 9

From: Microwave pyrolyzed sewage sludge: influence on soil microbiology, nutrient status, and plant biomass

Fig. 9

A Fresh and B dry aboveground (AGB) lettuce biomass and content of leaf pigments in lettuce cultivated on different substrate treatments—C chlorophyll a, D chlorophyll b, F carotenoids and E the chlorophyll (a/b) ratio. Mean ± standard deviation (error bars) calculated from independent values (n = 4), different letters express the statistical differences at significance level p ≤ 0.05

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