abstract background blue brown Dirt dirty saavem sky Soil texture bay beach coast ecosystem environment habitat organism sand shore bare earth furrows patterns plough ploughed tracks 2013 pot many mixed nature plants potted several crop farm field harvest land shrubs trees cracked cracked soil cracking dried drought drying out lake bed cloud clouds HDR naked Nyberg tree igneous metamorphic science Sed forest green ground reptile summer terrapin tortoise turtle turtles water