Oregon State University. Extension Service; Hart, John M. (John Mervyn), 1947-; Robotham, Michael; Gardner, Ernest Hugh ([Corvallis, Or.] : Oregon State University, Extension Service, 1995-05)
Laboratory soil tests will help you develop
and maintain more productive soil and
increase crop production by providing
information on the available nutrient content of
your soil. Soil testing helps you select the
c ...