Table 4 lists FAO chemical standard for clay soil compound analysis.
From: Design and manufacturing of superabsorbent polymers (SAPs) for agriculture in arid areas
(FAO) Chemical standard of clay soil compound analysis | Range | |
|---|---|---|
Max. | Min. | |
Organic Matter Content % | 5.0 | 0.5 |
Carbon-to-Nitrogen Ratio % | 20:1 | 10:1 |
Organic Carbon % | 3.0 | 1.0 |
Ash Content % | 20.0 | 10.0 |
(Total) Nitrogen % | 0.5 | 0.1 |
Potassium (K+ %) | 2.0 | 0.1 |
Phosphorus (P+ %) | 0.1 | 0.02 |
