pôdna biológia 4 [vynechat] soil biology damage to soils 2 [vynechat] ekológia pôdy 2 [vynechat] humus 2 [vynechat] poškodenie pôdy 2 [vynechat] pôda 2 [vynechat] pôdne mikroorganizmy 2 [vynechat] pôdne organizmy 2 [vynechat] soil 2 [vynechat] soil ecology 2 [vynechat] soil microorganisms 2 [vynechat] soil organisms 2 [vynechat] soil properties 2 [vynechat] soil use 2 [vynechat] vlastnosti pôdy 2 [vynechat] využitie pôdy 2 [vynechat]