Aggregates 2 Soil structure 'Dry' [ 1 13C-CPMAS NMR 1 Aggregate stability 1 Aromatic compounds 1 Aromatization 1 Carbon stability 1 Chemical analysis 1 Chemical composition of soils 1 China 1 Clay 1 Cp/mas nmr 1 Driers (materials) 1 Ecosystems 1 Elastic moduli 1 Elastic modulus 1 Elevation gradient 1 Helan Mountains 1 Indentation 1 Landforms 1 Macroaggregates 1 Measurements of 1 Micromechanical characterization 1 Micromechanics 1 Mountain ecosystem 1 Mountain ecosystems 1 Nuclear magnetic resonance 1 Nuclear magnetic resonance spectroscopy 1 Organic carbon 1