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Agronomic Services — Soil Testing

Mehlich Buffer Acidity
Table 3. Acidity and lime equivalent for each unit change in buffer pH
Buffer pH
Acidity
(meq/100 cm³)
Lime Equivalent
(kg/hectare)
Lime Equivalent
(lb/acre)
Lime Equivalent
(90% CCE)
6.6
0.0
0
0
0
6.5
0.4
400
357
397
6.4
0.8
800
713
792
6.3
1.2
1200
1069
1188
6.2
1.6
1600
1426
1584
6.1
2.0
2000
1782
1980
6.0
2.4
2400
2138
2376
5.9
2.8
2800
2495
2772
5.8
3.2
3200
2851
3167
5.7
3.6
3600
3208
3564
5.6
4.0
4000
3564
3960
5.5
4.4
4400
3920
4356
5.4
4.8
4800
4277
4752
5.3
5.2
5200
4633
5148
5.2
5.6
5600
4990
5544
5.1
6.0
6000
5346
5940
5.0
6.4
6400
5702
6336
4.9
6.8
6800
6059
6732
4.8
7.2
7200
6415
7128
4.7
7.6
7600
6772
7524
4.6
8.0
8000
7128
7920
4.5
8.4
8400
7404
8227
4.4
8.8
8800
7841
8712
4.3
9.2
9200
8197
9108
4.2
9.6
9600
8554
9504
4.1
10.0
10,000
8910
9900
4.0
10.4
10,400
9266
10,295

 


Last Update April 24, 2013

 

 

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