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THE NITROGEN FORM OF NONHYDROLYZABLE RESIDUE OF HUMIC ACID |
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| Institution: | ZHUO SU-NENG WEN QI-XIAO DU LI-JUAN WU SHUN-LING (Institute of Soil Science, Academia Sinica, Nanjing 633318, PRC ) |
| Abstract: | |
| Keywords: | ~(15)N CP-MAS NMR nonhydrolyzable nitrogen humie acid |
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