environmental
agricultural
agriculture
agrochemical
ammonia
background
bag
balls
carbamide
care
chemical
compound
cultivated
enrichment
environment
farming
fertilization
fertilizer
gardening
grains
granular
grey
heap
horticulture
industry
many
mineral
natural
nitrate
nitrogen
nutrient
object
organic
pellets
phosphate
phosphorus
pile
potash
sack
scoop
season
shovel
soil
spring
sulfate
synthetic
top
urea
view
white