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Function of Humus• increases water holding capacity• sticks together & helpsestablish and maintain a strongcrumb structure & aidsinfiltration• provides some nutrients (N & P)as it is slowly decayed bymicrobial activity at the rate of2.5% per year• buffers pH changes• creates good soil “ Tilth”• holds nutrients by increasingcation & anion exchangecapacity, and chelating capacityHumus =HighMediumLow
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