Soils : how to handle and improve them

Antzeko izenburuak

• Irrigated soils : their fertility and management
  nork: Peterson, H.B
  Argitaratua: (1954)
• Soil fertility: theory and practice
  nork: Kanwar, G S
  Argitaratua: (1976)
• Irrigated soils: Their fertility and management
  nork: Peterson, H B
  Argitaratua: (1954)
• Irrigated soils: Their fertility and management
  nork: Peterson, H B
  Argitaratua: (1954)
• Maintenance of soil fertility
  nork: Thorne, Charles Embree
  Argitaratua: (1930)