Skip to main content
Chemical and Biological Technologies in Agriculture
Fig. 1 | Chemical and Biological Technologies in Agriculture

Fig. 1

From: The impact of the long-term application of mineral nitrogen and sewage sludge fertilizers on the quality of soil organic matter

Fig. 1

Relative average silage DM yields (1997–2020). Different letters describe statistically significant differences between treatments. Tukey’s HSD test (p < 0.05). Con Unfertilized control; N120 Mineral fertilization (120 kg N ha−1); N240 Mineral fertilization (240 kg N ha−1); S120 Sewage sludge (120 kg N ha−1); S240 Sewage sludge (240 kg N ha.−1)

Back to article page