National Accreditation Board for Testing and Calibration Laboratories

(A Constituent Board of Quality Council of India)

Soil Testing Laboratory Program

NABL Soil Testing Laboratories Program
S. No. Discipline - Group - Sub Group Test Parameter Range Test Method(s) CRM / RM
1 CHEMICAL – Soil & Rock – Agriculture Soil pH 1 to 14 Manual of Soil Testing
(Soil Water Suspension)
pH Buffers
2 CHEMICAL – Soil & Rock – Agriculture Soil pH 1 to 14 Manual of Soil Testing
(Woodruff’s Method)
pH Buffers
3 CHEMICAL – Soil & Rock – Agriculture Soil pH 1 to 14 Manual of Soil Testing
(Shoe Maker Method)
pH Buffers
4 CHEMICAL – Soil & Rock – Agriculture Soil pH 1 to 14 IS 2720 (Part 26) pH Buffers
5 CHEMICAL – Soil & Rock – Agriculture Soil Electrical Conductivity 0.1dS/m to 10 dS/m Manual of Soil Testing
6 CHEMICAL – Soil & Rock – Agriculture Soil Electrical Conductivity 0.1dS/m to 10 dS/m IS 14767
7 CHEMICAL – Soil & Rock – Agriculture Soil Organic Carbon 0.1% to 5% Manual of Soil Testing
(Loss of Weight on Ignition)
8 CHEMICAL – Soil & Rock – Agriculture Soil Organic Carbon 0.1% to 5% Manual of Soil Testing
(Walkley and Black, 1934)
(Volumetric Method)
9 CHEMICAL – Soil & Rock – Agriculture Soil Organic Carbon 0.1% to 5% Manual of Soil Testing
(Colorimetric Method)
10 CHEMICAL – Soil & Rock – Agriculture Soil Available Nitrogen 0.1kg/ha to 1000 kg/ha Manual of Soil Testing
(Subbiah and Asija, 1956)
11 CHEMICAL – Soil & Rock – Agriculture Soil Available Phosphorous 0.1kg/ha to 300 kg/ha Manual of Soil Testing
(Olsen et al., 1954)
Phosphorous Standard
12 CHEMICAL – Soil & Rock – Agriculture Soil Available Phosphorous 0.1kg/ha to 300 kg/ha Manual of Soil Testing
(Bray and Kurtz, 1945)
Phosphorous Standard
13 CHEMICAL – Soil & Rock – Agriculture Soil Available Phosphorous 0.1kg/ha to 300 kg/ha Manual of Soil Testing(ICP) Phosphorous Standard
14 CHEMICAL – Soil & Rock – Agriculture Soil Available Potassium 0.1kg/ha to 1000 kg/ha Manual of Soil Testing
(Toth and Prince, 1949)
Potassium Standard
15 CHEMICAL – Soil & Rock – Agriculture Soil Available Potassium 0.1kg/ha to 1000 kg/ha Manual of Soil Testing (ICP) Potassium Standard
16 CHEMICAL – Soil & Rock – Agriculture Soil Available Sulphur 0.1mg/kg to 200 mg/Kg Manual of Soil Testing
(Chesnin and Yien, 1950)
Sulphur Standard
17 CHEMICAL – Soil & Rock – Agriculture Soil Available Sulphur 0.1mg/kg to 200 mg/Kg Manual of Soil Testing (ICP) Sulphur Standard
18 CHEMICAL – Soil & Rock – Agriculture Soil Zinc 0.1mg/kg to 20 mg/kg Manual of Soil Testing
(Lindsay and Norvell, 1956) (AAS)
Zinc Standard
19 CHEMICAL – Soil & Rock – Agriculture Soil Zinc 0.1mg/kg to 20 mg/kg Manual of Soil Testing
(Lindsay and Norvell, 1956) (ICP)
Zinc Standard
20 CHEMICAL – Soil & Rock – Agriculture Soil Iron 0.1mg/kg to 20 mg/kg Manual of Soil Testing
(Lindsay and Norvell, 1956) (AAS)
Iron Standard
21 CHEMICAL – Soil & Rock – Agriculture Soil Iron 0.1mg/kg to 20 mg/kg Manual of Soil Testing
(Lindsay and Norvell, 1956) (ICP)
Iron Standard
22 CHEMICAL – Soil & Rock – Agriculture Soil Copper 0.1mg/kg to 20 mg/kg Manual of Soil Testing
(Lindsay and Norvell, 1956) (AAS)
Copper Standard
23 CHEMICAL – Soil & Rock – Agriculture Soil Copper 0.1mg/kg to 20 mg/kg Manual of Soil Testing
(Lindsay and Norvell, 1956) (ICP)
Copper Standard
24 CHEMICAL – Soil & Rock – Agriculture Soil Manganese 0.1mg/kg to 20 mg/kg Manual of Soil Testing
(Lindsay and Norvell, 1956) (AAS)
Manganese Standard
25 CHEMICAL – Soil & Rock – Agriculture Soil Manganese 0.1mg/kg to 20 mg/kg Manual of Soil Testing
(Lindsay and Norvell, 1956) (ICP)
Manganese Standard
26 CHEMICAL – Soil & Rock – Agriculture Soil Boron 0.1mg/kg to 20 mg/kg Manual of Soil Testing
(Lindsay and Norvell, 1956) (AAS)
Boron Standard
27 CHEMICAL – Soil & Rock – Agriculture Soil Boron 0.1mg/kg to 20 mg/kg Manual of Soil Testing
(Lindsay and Norvell, 1956) (ICP)
Boron Standard

Equipment

S. No. Discipline Equipment Name In-house/ traceability External/ laboratory name
1 Chemical pH Meter Traceable to SI units using CRM NA
2 Chemical measuring cyliner NA NABL Accredited Calibration Lab
3 Chemical Beaker NABL Accredited Calibration Lab
4 Chemical Weighting Balance NA NABL Accredited Calibration Lab
5 Chemical Sieve Stainless Steel NA NABL Accredited Calibration Lab
6 Chemical Automatic Pipettes NA NABL Accredited Calibration Lab
7 Chemical Volumetric Flask NA NABL Accredited Calibration Lab
8 Chemical Mortar With Rubber Covered Pestle NA NA
9 Chemical Pipettes NA NABL Accredited Calibration Lab
10 Chemical Elecctrical Conductity Meter Traceable to SI units using CRM Manufacturer Certificate
11 Chemical Shaking Machine NA NA
12 Chemical Thermometer NA NABL Accredited Calibration Lab
13 Chemical Oven NA NABL Accredited Calibration Lab
14 Chemical erlenmeyer flasks NA NABL Accredited Calibration Lab
15 Chemical Muffle Furnance NA NABL Accredited Calibration Lab
16 Chemical Digital Burette NA NABL Accredited Calibration Lab
17 Chemical Conical Flask NA NABL Accredited Calibration Lab
18 Chemical Atomic Absorption Spectrophotometer NA NABL Accredited Calibration Lab
19 Chemical Kjeldahl digestion and distillation unit NA NABL Accredited Calibration Lab
20 Chemical measuring cyliner NA NABL Accredited Calibration Lab
21 Chemical heater NA NABL Accredited Calibration Lab
22 Chemical Bottel Top Dispenser NA NABL Accredited Calibration Lab
23 Chemical Inductively Coupled Plasma meter Traceable to SI units using CRM
24 Chemical Flame Photometer Traceable to SI units using CRM

Refrence Material

S. No. Discipline Reference Material Traceability
1 Chemical Boron Standard Traceable to SI Units
2 Chemical Calcium Chloride Traceable to SI Units
3 Chemical Copper Standard Traceable to SI Units
4 Chemical Iron Standard Traceable to SI Units
5 Chemical Manganese Standard Traceable to SI Units
6 Chemical pH Buffers Traceable to SI Units
7 Chemical Phosphorous Standard Traceable to SI Units
8 Chemical Potassium Standard Traceable to SI Units
9 Chemical Stannous chloride Traceable to SI Units
10 Chemical Sulphur Standard Traceable to SI Units
11 Chemical Zinc Standard Traceable to SI Units

Remarks

For laboratories going for recognition can also use OUSA STFR Meter to determine the above 12 parameters including available nitrogen calculated from organic carbon content of soil and use of CRMs as mentioned and calibrated equipment’s subject o success participation in PT