The number of country labs declined to a 1960's and 1970's because of several factors including soil sample volume, county agent/county extension council interest, cost of equipment maintenance and replacement and farmer demand for tests beyond the country soil test lab capabilities.
The number of county labs declined in the 1960's and 1970's because of several factors including soil sample volume, county agent/county extension council interest, cost of equipment maintenance and replacement, and farmer demand for tests beyond the county soil test lab capabilities.