Up to 90% of the weight of a grass plant is in its roots.

Grass cuttings are 90% water by weight.

The nutrients of typical grass cuttings are 4% Nitrogen, 2% potassium, 0.5% Phosphorus.

In a mature well planted lawn there will be an average of;
9,276 turf plants per square metre
387 miles of roots per plant
3.6 million miles of roots per square metre
1.26 billion miles of roots in a lawn 370 metres square.

Rain fall is measured in inches, and gardens are often reckoned to need one inch of water a week, but have you ever thought about just what 1 inch of water is?

1 inch of water on 1,000 square feet = 624 gallons.
1 inch of water on 1 acre = 27,200 gallons.
1 inch of water on 1 square mile is 17.4 million gallons.

1 gallon =
128 fluid ounces
15,100 drops
16 cups
8 pints
4 quarts

I could go on, but the amazing thing is that some one has actually taken the trouble to measure all these facts out!!!