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2by H. A. Snyman“...The requirements in managing the grassland ecosystem for sustainability are evaluated....”
Published 1999-07-01
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3by J VerschuurenSubjects: “...sustainable development...”
Published 2006-05-01
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4“... are also reviewed. Implementing these will make the services of soil biota available to improve and sustain...”
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6by Traugott JaehnichenSubjects: “...sustainable exploitation of outer space...”
Published 2020-08-01
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