How would you make a suitable potting mix for plants that grow best in an acidic growing medium?
What will be an ideal response?
Use primarily sphagnum moss (3 parts), with 1 part vermiculite, 1 part sand, and 1 part commercial potting soil.
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Also known as the lost-wax method, this casting technique enables the development of very close tolerances. A wax mold is coated with ceramic, and after the ceramic is hardened, the wax is melted and flows out, leaving a cavity to be filled with molten metal.
a. centrifugal casting b. die casting c. permanent casting d. investment casting
Which of these is NOT a sign that a mouse has been infected with Spironucleus muris or Giardia muris?
A) weight gain B) hunched posture C) lethargy D) sticky stools
Determine i(t) for t > 0 in the circuit of Fig. 8.96.
 FIGURE 1.png)
The swelling/shrinking tendency of some silicate clay minerals is due primarily to _____.
a. the high Mg2+ contents in the octahedral layers b. the movement of water molecules in and out of the interlayers of the crystal c. the presence of cations attracted by the negative charges on the internal surfaces d. substitution of Si4+ in the tetrahedral layers