Table 4.

Raw data of soil permanganate oxidizable carbon (POX-C) concentrations and stocks at the 0 to 6.7 cm depth in years 0 and 6, and the 0 to 30 cm depth in year 8 from the Salinas Organic Cropping Systems experiment in Salinas, California This data from five of the eight systems with optimal seeding rates for weed suppression was included the related paper in PLoS ONE [1]. A Microsoft Excel version of the table is available in the supplementary material (Supplementary Table 3).

Overview of the data1										Labile Carbon2
Block (i.e. replicate)	Year	Symbol color & shape in PLoS ONE article figures3	System ID in Data in Brief article4	System ID & description used in associated article in PLoS ONE5	Compost added6	Winer cover cropping frequency7	Cover crop type8	Cover crop seeding rate8	Sample Depth	POX-C Concentration	POX-C Stock
									cm	mg kg−1	Mg ha−1
1	0		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 6.5	316	0.293
2	0		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 6.5	327	0.303
3	0		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 6.5	321	0.298
4	0		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 6.5	324	0.301
1	0		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 6.5	316	0.293
2	0		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 6.5	321	0.298
3	0		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 6.5	341	0.316
4	0		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 6.5	322	0.299
1	0	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 6.5	NA	NA
2	0	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 6.5	NA	NA
3	0	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 6.5	NA	NA
4	0	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 6.5	NA	NA
1	0		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 6.5	319	0.296
2	0		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 6.5	364	0.338
3	0		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 6.5	363	0.337
4	0		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 6.5	362	0.336
1	0		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 6.5	252	0.234
2	0		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 6.5	318	0.295
3	0		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 6.5	317	0.295
4	0		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 6.5	354	0.329
1	0	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 6.5	NA	NA
2	0	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 6.5	NA	NA
3	0	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 6.5	NA	NA
4	0	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 6.5	NA	NA
1	0		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 6.5	403	0.37
2	0		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 6.5	365	0.34
3	0		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 6.5	413	0.38
4	0		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 6.5	390	0.36
1	0	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 6.5	NA	NA
2	0	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 6.5	NA	NA
3	0	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 6.5	NA	NA
4	0	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 6.5	NA	NA
1	6		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 6.5	349	0.324
2	6		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 6.5	369	0.343
3	6		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 6.5	342	0.318
4	6		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 6.5	360	0.334
1	6		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 6.5	366	0.339
2	6		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 6.5	498	0.462
3	6		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 6.5	417	0.388
4	6		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 6.5	479	0.445
1	6	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 6.5	NA	NA
2	6	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 6.5	NA	NA
3	6	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 6.5	NA	NA
4	6	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 6.5	NA	NA
1	6		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 6.5	551	0.512
2	6		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 6.5	552	0.513
3	6		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 6.5	609	0.566
4	6		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 6.5	546	0.507
1	6		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 6.5	523	0.486
2	6		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 6.5	574	0.533
3	6		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 6.5	594	0.551
4	6		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 6.5	611	0.568
1	6	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 6.5	NA	NA
2	6	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 6.5	NA	NA
3	6	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 6.5	NA	NA
4	6	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 6.5	NA	NA
1	6		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 6.5	601	0.558
2	6		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 6.5	551	0.512
3	6		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 6.5	497	0.461
4	6		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 6.5	589	0.546
1	6	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 6.5	NA	NA
2	6	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 6.5	NA	NA
3	6	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 6.5	NA	NA
4	6	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 6.5	NA	NA
1	8		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 30	393	1.63
2	8		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 30	426	1.77
3	8		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 30	365	1.52
4	8		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 30	351	1.46
1	8		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 30	356	1.48
2	8		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 30	516	2.15
3	8		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 30	486	2.02
4	8		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 30	443	1.84
1	8	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 30	NA	NA
2	8	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 30	NA	NA
3	8	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 30	NA	NA
4	8	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 30	NA	NA
1	8		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 30	578	2.40
2	8		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 30	565	2.35
3	8		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 30	592	2.46
4	8		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 30	534	2.22
1	8		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 30	492	2.04
2	8		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 30	576	2.39
3	8		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 30	573	2.38
4	8		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 30	528	2.20
1	8	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 30	NA	NA
2	8	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 30	NA	NA
3	8	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 30	NA	NA
4	8	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 30	NA	NA
1	8		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 30	578	2.40
2	8		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 30	558	2.32
3	8		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 30	562	2.34
4	8		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 30	598	2.49
1	8	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 30	NA	NA
2	8	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 30	NA	NA
3	8	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 30	NA	NA
4	8	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 30	NA	NA
1	Change over 6 yrs		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 6.5	34	0.031
2	Change over 6 yrs		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 6.5	43	0.039
3	Change over 6 yrs		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 6.5	21	0.020
4	Change over 6 yrs		1*	1-No Compost + Legume-rye 4th Year	No	Every 4th winter	Leg-rye	3x	0 to 6.5	36	0.033
1	Change over 6 yrs		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 6.5	50	0.046
2	Change over 6 yrs		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 6.5	177	0.164
3	Change over 6 yrs		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 6.5	77	0.071
4	Change over 6 yrs		2*	2-Compost + Legume-rye 4th Year	Yes	Every 4th winter	Leg-rye	3x	0 to 6.5	157	0.146
1	Change over 6 yrs	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 6.5	NA	NA
2	Change over 6 yrs	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 6.5	NA	NA
3	Change over 6 yrs	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 6.5	NA	NA
4	Change over 6 yrs	NA	3*	NA	Yes	Every winter	Leg-rye	1x	0 to 6.5	NA	NA
1	Change over 6 yrs		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 6.5	233	0.216
2	Change over 6 yrs		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 6.5	188	0.175
3	Change over 6 yrs		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 6.5	247	0.229
4	Change over 6 yrs		4*	3-Compost + Legume-rye annually	Yes	Every winter	Leg-rye	3x	0 to 6.5	184	0.171
1	Change over 6 yrs		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 6.5	271	0.251
2	Change over 6 yrs		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 6.5	257	0.238
3	Change over 6 yrs		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 6.5	276	0.257
4	Change over 6 yrs		5*	4-Compost + Mustard annually	Yes	Every winter	Mustard	1x	0 to 6.5	257	0.239
1	Change over 6 yrs	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 6.5	NA	NA
2	Change over 6 yrs	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 6.5	NA	NA
3	Change over 6 yrs	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 6.5	NA	NA
4	Change over 6 yrs	NA	6*	NA	Yes	Every winter	Mustard	3x	0 to 6.5	NA	NA
1	Change over 6 yrs		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 6.5	198	0.184
2	Change over 6 yrs		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 6.5	186	0.173
3	Change over 6 yrs		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 6.5	83	0.077
4	Change over 6 yrs		7*	5-Compost + Rye annually	Yes	Every winter	Rye	1x	0 to 6.5	199	0.184
1	Change over 6 yrs	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 6.5	NA	NA
2	Change over 6 yrs	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 6.5	NA	NA
3	Change over 6 yrs	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 6.5	NA	NA
4	Change over 6 yrs	NA	8*	NA	Yes	Every winter	Rye	3x	0 to 6.5	NA	NA

¹The data provided in this table is from the Salinas Organic Cropping Systems (SOCS) study in Salinas, California. This includes soil POX-C concentrations and stocks at time 0, years 6 and 8, and the change over first 6 years for the 5 systems with optimal seeding rates for weed suppression included in the related article in PLoS ONE [1]. The experimental design was a randomized complete block with 4 blocks (i.e., replicates). These data are provided to give readers an opportunity use the data for future meta-analyses, or analysis of confidence intervals, effect sizes, etc. in the Explanatory Software for Confidence Intervals (ESCI) produced by Geoff Cumming. ESCI is freely available at https://thenewstatistics.com/itns/esci/

²To account for changes in soil bulk density over time POX-C stocks were calculated using the Maximum Equivalent Soil Mass Method [7].

³The symbols, shapes, and colors used in the PLoS ONE article. Note that in this article the data for only 5 systems were included, but in this Data in Brief article, the data for all 8 systems is included. NA= not applicable because the system was not included in the PLoS ONE article.

⁴In this Data in Brief article, these numbers (1–8) were uses for the 8 systems.

⁵In the PLoS ONE article only 5 systems with seeding rates that provided optimal weed suppression were included. NA= not applicable because these 3 systems were not included in the PLoS ONE article.

⁶The application rate for compost, which was applied prior to each vegetable crop, was 7.6 Mg ha⁻¹ on an oven dry weight basis. The compost was made from urban yard waste.

⁷Winter cover cropping period was from October or November to February or March.

⁸See Table 1 for details on the cover crop types and seeding rates.