10-16-15
Soil triangle quiz
Handed out vocabulary words worksheet
Active Fractions – a component of the soil having an ion exchange capacity specifically clay or organic
matter
Soil pH – optimum pH for row crops is 6.5 (slightly acidic); more precipitation the more acidic the soil.
Precipitation decreases from east to west. In PA 45” per year on average. Colorado gets about 10” per
year.
Classifying soil into orders, suborders, great groups, subgroups, and families. Can find this information
in the County Soil Survey (done by the USDA) includes maps of the area, yield potential, development
limitations, detailed soil identifying features