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   <subfield code="a">Improving organic crop cultivation</subfield>
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   <subfield code="c">edited by Prof. Ulrich Köpke</subfield>
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   <subfield code="a">Global sales of organic products have grown significantly, yet organic farming remains a small percentage of overall agricultural production with lower yields than conventional methods. Organic crop cultivation thus faces a range of challenges if it is to grow significantly. This volume reviews the wealth of research addressing these challenges.</subfield>
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