English AGROVOC

uf Biological activity in soil
BT Biology
NT Soil respiration
RT Denitrification
RT Ethylene production
RT Microbial flora
RT Nitrification
RT Nitrogen fixation
RT Root nodulation
RT Soil air
RT Soil organisms
RT Soil sciences
(Lao)
   ຊີວະວິທະຍາດິນ
(French)
   Biologie du sol
(Spanish)
   Biología del suelo