Maryland's Agricultural Nutrient Management Program webpage has a wealth of information on writing plans, soil testing, and upcoming trainings.
Here are some documents specific to soil testing which are also available on their website:
If you have a farm or agricultural operation in Montgomery County and would like more information on Nutrient Management Planning, please contact Amanda Laudwein with Montgomery County Office of Maryland Cooperative Extension.
Montgomery Soil Conservation District|
18410 Muncaster Road
Derwood, MD 20855