| 1 | Try humus on wheat pita bread. | |
| 2 | Different solvents affecting the rate of humic acid extraction are discussed. | |
| 3 | Results show that this means can measures the purity of humic acid easily and accurately . | |
| 4 | IR spectra showed that H-bonds and charge-transfer bonds between humic acid and fungicides probably operated as mechanisms of adsorption. | |
| 5 | The free- state humus is very little in soil , and an overwhelming majority of humus isadsorbed on clay mineral surfaces to form stable clay mineral - humus complexes. |
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