Author Question: If a green drains poorly, the addition of ____ could result in the formation of black layer. A) ... (Read 141 times)

viki · **on:** Jul 21, 2018

If a green drains poorly, the addition of ____ could result in the formation of black layer.

A) potassium
B) sand
C) sulfur
D) calcined clay

Question 2

Placing medium-textured sand over a layer of pea gravel or crushed stone creates a ____ water table.

A) pinched
B) poached
C) pitched
D) perched