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Soil Testing Service

Soil testing was done by the Master Gardeners at the Garden Center and records were kept of those tests. The following chart lists the soil test readings from 2/27/95 to 8/24/95. These records are representative of the readings over the almost 20 year period that testing was done and are included here to demonstrate the fact that most of our soils are alkaline, we rarely need potassium and phosphorus and the soils are low in organic matter unless large amounts of amendments have been added.

Optimum readings for good soil nutrition are N =27 to 100. P=40 to 100. K=54 to 150 or higher. % Organic Matter=2.0 or higher. Total Soluble salts= below 400

nitrogen	phosphorus	potassium	pH		%OM	Total Soluble Salts
48	200	500		8.09	3.6	28
50	110	680		7.96	2.8	33
70	116	500		7.64	7	53
78	200	1000		7.56	6.9	90
100	170	900		7.56	7	80
83	120	300		7.99	2.2	46
52	110	480		8.31	2.7	46
62	100	350		8.14	2	42
68	48	370		8.33	1.2	50
120	76	500		6.9	5.3	85
120	200	820		7.87	4.6	120
115	200	900		8.32	6	120
94	89	370		7.68	4.1	58
94	110	380		7.9	0	62
65	200	600		7.25	1.2	45
120	200	1200		8.04	0.83	275
68	30	375		7.58	1.25	18
69	115	390		7.72	3.3	32
53	68	280		7.71	0.87	20
120	200	1200		8.12	5.1	115
72	200	1200		7.98	5.2	140
120	200	870		7.18	3.95	320
39	200	680		7.55	2	120
0	175	600		7.53	2.7	52
28	175	1150		7.47	3.2	70
13	175	320		7.91	0.8	60
5	200	1200		7.65	5.5	52
38	200	1200		7.97	6.5	160
0	120	200		8.54	0.6	56
18	180	850		7.88	3.7	110
38	200	375		7.12	2.49	100
11	80	450		7.52	0.48	50
120	200	1200		6.91	6	250
9	200	380		5.92	4.5	45
8	180	690		7.77	1.49	45
80	130	1000		7.39	1.6	420
32	112	970		7.61	1.7	170
17	200	500		7.91	2.9	48
120	200	1200		7.24	4.4	680
24	200	820		7.85	6	120
8	na	na		8.49	na	100
8	50	380		8.35	5	30
25	200	1000		7.75	3.25	40
0	195	650		8.47	0	44
120	200	1200		6.46	6.5	780
9	110	250		7.93	4.8	46
10	120	250		7.77	1.1	44
120	100	350		7.41	0.95	440
8	75	150		8.45	0.35	30
0	40	150		8.08	3.8	46
90	200	1100		8.32	5.4	58
120	200	1200		8.42	5.6	540
12	180	700		7.67	5	30
120	110	1200		7.55	2.7	74
5	58	1200		8.19	1.65	30
12	52	600		8.12	3.9	24
120	150	1200		6.73	5.1	340
40	80	850		7.49	2.8	88
90	140	1200		7.08	5.3	50
120	155	1200		6.85	3.9	300
120	110	900		6.79	6.5	110
120	200	1200		5.86	2.25	400
0	150	1150		7.9	2.3	30
120	200	1200		8.15	6	640
43	200	1200		781	6	78
118	200	1200		8.63	4.6	550
5	105	725		8.14	2.05	18
120	200	1200		7.64	na	na
10	200	1000		8.8	0.95	285
48	200	1200		8.7	3.5	180
18	na	na		7.8	2.4	79
90	175	1050		7.5	5.9	200
2	45	275		7.7	0.15	160

Prepared from data files compiled by Ruth Bronson, Lifetime Master Gardener, Master Composter. October 27, 1995

Note: Maximum readings for potassium with our equipment without interpolation of test results is 1200. Maximum reading for phosphorus is 200. Soil test that show na indicate that that test was not requested and was not done.

02/01/2009
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