top view of azolla, a small aquatic plant of the floating fern family grows on the surface of water

abstract agricultural agriculture aquatic azolla background botanic botany camouflage closeup color colorful compost composting cover decoration environment farm feed fern fertilizer floating foliage food forest fresh garden grass green grow growth ingredient leaf macro natural nature nitrogen nutrient nutrition organic outdoor pattern plant protein surface texture tree tropical wallpaper water top view small family grows warm waters high used animals