| 11. | Humic acids generated by worms disintegrate rock; their burrowing behaviour speeds this up.
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| 12. | When imazaquin is applied to crops its main interaction is with soil humic acids.
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| 13. | He adds dried kelp powder, naturally produced humic acid and a variety of powdered minerals.
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| 14. | Apart from radioactivity, the water quality is also weakened by humic substances and local sewage.
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| 15. | Clay minerals in the A horizon decompose by reaction with humic acids and form soluble salts.
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| 16. | Fulvic acid is of relatively low molecular mass and is biologically more active than humic acid.
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| 17. | Leonardite is an oxidized form of lignite, which is also contains high levels of humic acid.
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| 18. | The presence of carboxylate and phenolate groups gives the humic acids the ability to form chelate complexes.
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| 19. | The mixture is heated to inactivate the enzymes and then filtered to remove the insoluble humic acid.
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| 20. | In Labrador along the Churchill River valley Ferro-Humic Podzols comprise about 36 % of soils.
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