Tillage operations

These codes are obsolete

Now the user selects operations from the NRCS field operations table

Primary tillage operations

SCS Code	Description	Surface residue	Shallow residue	Group
10	Combination chisel-disc	65	20	10
11	Chisel-straight	70	20	7
101	Chisel 24" spacing	75	0	3
125	Chisel-straight 18" spacing w/legume	35	55	7
126	Chisel-straight 24" spacing w/legume	40	50	3
127	Chisel-twisted 18" spacing w/legume	25	65	8
128	Chisel-twisted 24" spacing w/legume	30	60	4
12	Chisel-twisted 18" spacing	50	40	8
102	Chisel-twisted 24" spacing	55	0	4
13	Chisel-following stubble	35	55	6
14	Disc plow-deep	40	30	7
15	Disc plow-shallow	60	35	8
16	Moldboard uphill furrow slice	40	30	1
17	Moldboard plow early slow or shallow	25	40	2
18	Moldboard plow-mod. depth & speed	10	20	4
19	Moldboard plow-late fast, deep	5	10	5
28	Moldboard any plow (follow flail)	5	20	5
21	Subsoil 48" spacing	85	5	9
106	Subsoil 36"spacing	85	0	4
22	Heavy disk with legume any depth	15	80	9
23	Regular sweep	80	10	10
24	Wide blade-sweep (towner or noble)	90	5	9
107	Landlord 30" spacing	70	0	19
108	Landlord 40" spacing	75	0	19
109	Paraplow	95	0	13
20	Regular offset disc	55	30	9
27	Regular offset with legume	15	80	11
103	Irrigated soil moist	25	-	-
104	Irrigated soil optimum	10	-	-
105	Irrigated soil dry	5	-

Secondary tillage operations
(first operation after moldboard)

SCS Code	Description	Surface residue	Shallow residue	Group
33	Disc harrow-light 1-10cm	60	35	11
26	Disc harrow w/legume	30	65	10
32	Field cultivator	85	15	10
25	Field cultivator *	95	5	18
130	Field cultivator w/legume	45	55	10
36	Rod weeder with sweeps or chisel	85	15	11
46	Rod weeder with sweeps or chisel *	95	5	18
37	Rod weeder plain	90	10	13
47	Rod weeder plain *	100	0	18
34	Rotary hoe or cultivator	75	20	14
31	Rotary tiller	30	50	17
38	Spike harrow-10 bar	80	20	13
48	Spike harrow-10 bar *	90	10	18
29	Skew treader backward	80	20	14
30	Skew treader foreward	70	30	16
43	Spike harrow-5 bar	90	10	14
56	Spike harrow-5 bar *	100	0	18
35	Spring tooth cultivator	85	10	12
45	Spring tooth cultivator *	95	0	18
110	Swedish harrow	90	0	14
49	Tandem-any spike or tine-3 bar	95	5	18
44	Tine harrow-5 bar	90	10	14
58	Tine harrow-5 bar *	100	0	18
39	Tine harrow-10 bar	85	15	14
57	Tine harrow-10 bar *	95	5	18
87	Seedbed marker	85	-	-

Planting operations (dry)

SCS Code	Description	Surface residue	Shallow residue	Group
50	Semi-deep furrow drill	85	10	10
51	Deep furrow drill	80	15	9
52	Hoe drill	80	15	9
53	Double disc drill-7 inch	90	5	11
54	Air seeder-chisel type	70	30	10
55	Air duck foot	60	40	10
59	Heavy double disc-legume	30	70	11
85	Aerial seeding	100	0	-
86	Brillion seeder	100	0	-

Planting operations (irrigated)
(* Following strip tillage)

SCS Code	Description	Surface residue	Shallow residue	Group
112	Corn planter	95	-	-
132	Corn planter *	90	-	-
113	Onion planter	75	-	-
133	Onion planter *	70	-	-
114	Potato planter	60	-	-
134	Potato planter *	55	-	-
115	Vegetable seed planter	90	-	-
135	Vegetable seed planter *	85	-	-

Planting no-till drill operations

SCS Code	Description	Surface residue	Shallow residue	Group
63	Chisel point or hoe opener	65	35	9
60	Light double disc drill	75	25	10
116	Light double disc irrig.33"	90	-	-
117	Light double disc 36" sp	95	0	18
61	Heavy double disc drill	60	40	11
59	Heavy double disc w/legume residue	30	-	-
64	Heavy double disc w/grain residue	45	55	11
118	Heavy double disc irrig. 33"	80	-	-
119	Heavy double disc irrig. 36"	85	0	18
120	Heavy double disc w/corn residue 36"	75	0	18
62	Heavy double disc w/scuffer	50	50	12
65	Heavy double disc w/grain residue	45	55	12
66	Heavy double disc w/legume residue	30	70	12
77	No till drill 1	90	10	18
78	No till drill 2	75	15	10

Residue manipulation operations

SCS Code	Description	Surface residue	Shallow residue	Group
80	Stubble flail,chop,bust	100	0	18
81	Stubble grazing	65	0	18
82	Stubble baling	35	0	18
83	Stubble burning	10	0	18
100	Corn stubble grazing	50	0	18