The Effect of Earthworm (Lumbricus terrestris L.) Population Density and Soil Water Content Interactions on Nitrous Oxide Emissions from Agricultural Soils

Table 3

Mean initial and final biomass in the low, medium, and high earthworm densities at 31% gravimetric soil moisture content.

	Density Treatment Biomass (g)
	Low^§	Medium	High
Initial	12.6 a^†	28.6 a	36.9 a
Final	27.1 b	44.4 b	74.2 b
SE	1.94	1.94	1.94
𝑃 value	.0007	.0003	.0001

^†Within columns, means followed by the same letter are not significantly different according to Tukey-Kramer means adjustment (0.05).
^§Low, medium, and high refer to densities of earthworms per 0.033 m²: 3, 6, and 9, respectively.