Table 4. Observed nutrient and moisture content of human excreta composted by two methods in a simulated double vault latrine system over 139 days with linear regression to predict values at 153 and 181 days.

	Sampling day						Average (≤139 days)	Predicted	P-value
	1	27	55	83	111	139
Ash								(181 days)
Total Nitrogen (%)	1.937	1.770	1.647	1.587	1.527	1.497	1.6611	1.3172	0.000
Total Phosphorus (%)	3.537	3.314	3.174	3.152	3.124	3.105	3.2341	2.9182	0.000
Total Potassium (%)	2.704	2.427	2.412	2.388	2.370	2.360	2.4431	2.2282	0.002
Moisture (%)	61.39	56.47	48.31	39.63	28.60	18.54	42.1551	6.8302	0.000
Ash + 10% Lime								(153 days)
Total Nitrogen (%)	1.820	1.643	1.550	1.477	1.413	1.377	1.547	1.2903	0.000
Total Phosphorus (%)	1.838	1.696	1.628	1.614	1.608	1.604	1.6653	N/A	0.565
Total Potassium (%)	2.054	1.865	1.849	1.835	1.822	1.816	1.8743	N/A	0.477
Moisture (%)	53.40	48.81	40.38	32.83	21.43	11.96	34.802	9.1633	0.000

¹Model inputs for Scenario A (≤ 139 day storage without lime)

²Model inputs for Scenario C (181 day storage without lime)

³Model inputs for Scenario B (153 day storage with 10% lime)