Fig. 7From: Carbon-enriched organic amendments differently affect the soil chemical, biological properties and plant biomass in a cultivation time-dependent mannerPCA biplot analyses of results after a 12 weeks and b 24 weeks of experiment. Average values (n = 4) are displayed, error bars are standard error of mean. The different letters of variant values indicate a statistical difference between them at the level p ≤ 0.05Back to article page