Biodynamic compost effects on soil parameters in a 27-year long-term field experiment

Chemical and Biological Technologies in Agriculture

Table 1 Soil texture and soil chemical parameters as affected by different farmyard cattle manure applications over 27 years. Long-term field experiment Wiesengut

Treatment	Sand	Silt	Clay	Soil pH	Extractable P	Extractable K
Treatment	(%)			(H₂O)	(µg g⁻¹ soil)
Control	43.9	45.6	10.4	6.63	34 b	104 b
FYM	45.6	44.3	10.1	6.70	45 a	171 ab
FYM + Achillea	47.1	42.9	10.0	6.60	38 ab	134 ab
FYM + all preparations	46.1	43.8	10.8	6.69	45 a	197 a
CV (± %)	7.3	7.8	13	2.1	16	34

CV = mean coefficient of variation between replicate plots (n = 6); different letters within a column represent a significant difference (p < 0.05; Tukey test)