Geoscience Reference
In-Depth Information
(iv) Exchangeable potassium (K)
1 meq/100g
= 390 ppm
= 390 µg/g
(v) % calcium
% Ca = exchangeable Ca (meq/100 g) × 100
sum of 4 cations (meq/100 g) 1
(vi) % magnesium
% Mg = exchangeable Mg (meq/100 g) × 100
sum of 4 cations (meq/100 g) 1
(v ii) % sodium
% Na = exchangeable Na (meq/100 g)
× 100
sum of 4 cations (meq/100 g) 1
(viii) % potassium
% K =
exchangeable K (meq/100g)
× 100
sum of 4 cations (meq/100g) 1
(6) Organic carbon
To calculate organic matter from organic carbon:
Organic carbon × 1.72 = organic matter
(7) Neutralising Value (%) in lime
A theoretical Neutralising Value can be calculated by:
CaCO 3 % + [2.5 × MgO] % = Neutralising Value
(8) Effective Neutralising Value (%) in lime
Neutralising Value × [(% material greater than 0.85 mm × 0.1) + (% material
between 0.85 and 0.30 mm × 0.6) + (% material less than 0.30 mm × 1.0)] =
Effective Neutralising Value
Search WWH ::




Custom Search