Walter, I., INIA. Madrid, Spain

• Spanish Journal of Agricultural Research Vol. 1 No. 3 (2003) - Invisible
  Field-grown maize (Zea mays L.) with composted sewage sludge. Effects on soil and grain quality
  Abstract  PDF
• Spanish Journal of Agricultural Research Vol. 4 No. 1 (2006) - Invisible
  Biosolid amendment of a calcareous, degraded soil in a semi-arid environment
  Abstract  PDF
• Spanish Journal of Agricultural Research Vol. 5 No. 1 (2007) - Invisible
  Effect of poultry litter on silage maize (Zea mays L.) production and nutrient uptake
  Abstract  PDF