ARTÍCULO
TITULO

Visual assessment of soil structure: Evaluation of methodologies on sites in Canada, China and Germany: Part I: Comparing visual methods and linking them with soil physical data and grain yield of cereals

Lothar Mueller    
Bev D. Kay    
Chunsheng Hu    
Yong Li    
Uwe Schindler    
Axel Behrendt    
T. Graham Shepherd    
Bruce C. Ball    

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