When you have a look at the tire of the car, you will notice that the numbers are written in the following pattern: P215/50R17. What is the Meaning of the First Letter? The first alphabet on the tire can be P, LT, ST or T. Sometimes there is the absence of the first alphabet. The first alphabet denotes:
Clay is one of the three principal types of soil, the other two being sand and loam. A certain amount of clay is a desirable constituent of soil, since it binds other kinds of particles together and makes the whole retentive of water. Excessively clayey soils, however, are exceedingly difficult to cultivate.
Soil particles come in three sizes: 1  Sands are the largest, and are coarse and gritty. 2  Silts are the middle-sized soil particles, and are smooth. 3  Clays are the smallest soil particles, and are fine and sticky. 4  An ideal soil would have equal amounts of sand, silt, and clay particles.