Table 5.

Statistical analysis of the data from the laboratory protocols on the total nitrogen and phosphorus content in the pig manure-based end-products.

Pig Farm	Type of End-Product	Nitrogen Amount in the End-Products, mg/kg			Phosphorus Amount in the End-Products, mg/kg
		Average Experimental Data $\overline{x}$	$\overline{x}+\sigma$	$\overline{x}-\sigma$	Average Experimental Data $\overline{x}$	$\overline{x}+\sigma$	$\overline{x}-\sigma$
Pig farm 1	Solid organic fertiliser	2800	2814	2786	–	–	–
	Liquid organic fertiliser	2100	2117.5	2082.5	–	–	–
Pig farm 2	Solid organic fertiliser	3200	3227.3	3172.7	900	912.1	900
	Liquid organic fertiliser	2200	2209.8	2190.2	700	706.4	693.6
Pig farm 3	Solid organic fertiliser	2900	2911.8	2888.2	850	855.4	844.6
	Liquid organic fertiliser	2157	2164.2	2149.8	730	734.7	725.3
	Aqua ammonia	56,000	56,057.5	55,942.5	0	0	0
	Effluent for additional fertilisation of grass	860	868.1	851.9	290	295.3	284.7
Pig farm 4	Liquid organic fertiliser	2500	2521.8	2478.2	710	715.2	704.8
Pig farm 5	Solid organic fertiliser	3080	3093.4	3066.6	870	877.6	862.4
	Liquid organic fertilisers	2250	2259.9	2240.1	650	656.5	643.5
Pig farm 6	Liquid organic fertiliser	2290	2314.6	2275.4	–	–	–
Pig farm 7	Liquid organic fertiliser	2460	2475.7	2444.3	–	–	–
Pig farm 8	Liquid organic fertiliser	1970	1989.3	1950.7	640	648.5	631.5
Pig farm 9	Solid organic fertiliser	5400	5426.9	5373.1	–	–	–
	Effluent for additional fertilisation of grass	1500	1507.1	1492.9	–	–	–
Pig farm 10	Solid organic fertiliser	4600	4621.7	4578.3	–	–	–
	Liquid organic fertiliser	1900	1909.7	1890.3	–	–	–
Pig farm 11	Liquid organic fertiliser	2060	2066.4	2053.6	610	612.1	607.9
Pig farm 12	Liquid organic fertiliser	2240	2251.2	2228.8	635	639.5	630.5
Pig farm 13	Liquid organic fertiliser	2800	2816.2	2783.8	670	676.9	663.1
Pig farm 14	Solid organic fertiliser	2700	2714.8	2685.2	–	–	–
	Liquid organic fertiliser	2350	2359.3	2340.7	–	–	–
Pig farm 15	Liquid organic fertiliser	2300	2315.6	2284.4	740	747.2	732.8