Table 4 Chemical content of the liming materials and biochar applied in the experiment.

From: Inoculation of Bacillus subtilis in acidic soil amended with biochar and liming materials in maize cultivation

Product

Content

Calcium oxide (Agrocal Mix)

Ca(OH)2: 35–40%

CaCO3: 1–5%

MgO: 11–15%

CaSO4: 30–35%

SiO2: 10–15%

Dolomite

CaO: 29%

MgO: 18%

Calcium carbonate (Magnecal)

CaCO3: 77%

MgCO3: 19%

Rice husk biochar*

pH: 6.5

Bulk density: 0.127 g‧cm−3

Electrical conductivity: 34.6 mS∙m-1

Organic matter: 46 g∙kg-1

Total nitrogen: 0.38 g∙kg-1

Phosphorus: 500 mg·kg-1

Potassium: 300 mg·kg-1

Calcium: 3600 mg·kg-1

Magnesium: 700 mg·kg-1

  1. *: Result of soil, water, and foliar laboratory analysis conducted by the National Institute of Agrarian Innovation (INIA), El Porvenir Agrarian Experimental Station (EEA).
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