Areas where your garden slopes down or ... although this is less of a problem once the plant is mature. A layer of mulch ...

But researchers hoping to barcode Earth's plants are in a different boat. "Animal people are well on their way," says Santiago Madriñán, a botanist at the University of the Andes in Columbia. "We are ...

These may not only solve the problem but may become a ... The combined surface area of the gravel and the root systems of the plants provides a substrate for the bacteria that break down the ...