1.   A mass of organic debris collects, and the shield becomes something of a built-in compost system.

2.   In late fall, remove all organic debris to the compost, then turn the soil.

3.   The mats of organic debris are two or more feet thick and occur in patches anywhere from a few square yards to acres, he reports.

4.   This explains the predominance of sea birds, mammals, and reptiles, which, it is thought, floated to the islands on organic debris.

5.   Waters depleted of oxygen by the decomposition of sewage or other organic debris cannot support a healthy population of fish and bottom-dwelling marine life like crabs.

6.   Composting speeds up the natural process of decomposition of organic debris by the myriad of micro- and macro-organisms in the soil.

7.   Five great rivers, including the Danube and the Dnieper, have carried organic debris for millennia.

8.   The main difference is that top-soil contains organic humus which is actually decaying or decayed vegetable matter or organic debris.