Organic matter fractions from organically and conventionally managed soils: II. Characterization of composition

Earth & Environmental Sciences

• soil organic matter 100%
• organic matter 70%
• humic acid 52%
• soil 44%
• fulvic acid 30%
• manure 25%
• litter 24%
• reflectance 22%
• crop residue 16%
• particulate organic matter 14%
• biological activity 13%
• FTIR spectroscopy 13%
• functional group 12%
• Fourier transform 11%
• management practice 11%
• clay 8%
• sand 8%
• mineral 7%
• comparison 5%
• experiment 5%
• effect 3%

Agriculture & Biology

• soil organic matter 99%
• humic acids 62%
• soil 53%
• fulvic acids 35%
• reflectance 26%
• particulate organic matter 18%
• mineral soils 16%
• crop residues 14%
• carbon nitrogen ratio 13%
• Fourier transform infrared spectroscopy 13%
• clay 12%
• chemistry 11%
• bioactive properties 11%
• sand 11%
• farming systems 10%