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Crop Fertilization Based on North Carolina Soil Tests
Table 1.3  Manganese availability indices (Mn-AI) forcrops less sensitive to manganese*
Soil pH Manganese Index from Soil Test Report
5
10
15
20
25
30
35
40
45
50
5.4
29
32
35
38
41
44
47
50
53
56
5.5
28
31
34
37
40
43
46
49
52
55
5.6
26
29
32
35
38
41
44
47
50
53
5.7
25
28
31
34
37
40
42
45
48
52
5.8
23
26
29
32
35
38
41
44
47
50
5.9
22
25
28
31
34
37
40
43
46
49
6.0
20
23
26
29
32
35
38
41
44
47
6.1
19
22
25
28
31
34
37
40
43
46
6.2
17
20
23
26
29
32
35
38
41
44
6.3
15
18
21
24
27
30
33
36
39
42
6.4
14
17
20
23
26
29
32
35
38
41
6.5
12
15
18
21
24
27
30
33
36
39
6.6
11
14
17
20
23
26
29
32
35
38
6.7
9
12
15
18
21
24
27
30
33
36
6.8
8
11
14
17
20
23
26
29
32
35
6.9
6
9
12
15
18
21
24
27
30
33
7.0
5
8
11
14
17
20
23
26
29
32
* Mn-AI is calculated based on equation B  [108.2 + 0.6 Mn-I15.2 pH]  and rounded to the nearest whole number. The critical Mn-AI = 25. Crops less sensitive to manganese include asparagus, beets, blueberries, Christmas trees, corn, forage grasses and legumes, pearl millet, milo, okra, irish potatoes, raspberry, rhubarb, rice, sorghum, sunflower, sweetpotatoes, and commercial nursery and flower crops.
return icon.Hardy DH, Tucker MR, Stokes CE. 2014. Crop fertilization based on North Carolina soil tests. Raleigh (NC): North Carolina Department of Agriculture and Consumer Services, Agronomic Division. Circular No. 1.

Last Update January 10, 2014

 

NCDA&CS Agronomic Services Division, Colleen M. Hudak-Wise, Ph.D., Director
Mailing Address: 1040 Mail Service Center, Raleigh NC 27699-1040
Physical Address: 4300 Reedy Creek Road, Raleigh NC 27607-6465
Phone: (919) 733-2655; FAX: (919) 733-2837



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