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| Callaham | Mac | USDA Forest Service, Southern Research Station, Athens GA USA | Email Contact Form | | View |
| Cantero-Martínez | Carlos | Associate Professor. University of Lleida. Dpto Produccion Vegetal y Ciencia Forestal | Email Contact Form | | View |
| Capriel | Peter | Bayerische Landesanstalt fur Bodenkultur und Pflanzenbau | | | View |
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| Gupta | A.P. | Department of Soil Science, CCS Harayana Agricultural University | | | View |
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| Huluka | Gobena | The Old Rotation, The Cullars' Rotaton | Email Contact Form | | View |
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| Klir | Jan | Research Institute of Crop Production | Email Contact Form | | View |
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| Li | Shi-Ye | Zhejiang Academy of Agricultural Sciences | | | View |
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| Li | zhaojun | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences | Email Contact Form | | View |
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