Journal of Production Agriculture
The Journal of Production Agriculture (JPA) was established in 1988 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, along with cooperators in publishing the journal. JPA was published from 1988 to 1999.
Citation | Cite the online journal as follows: Binford, G.D., and A.M. Blackmer. 1993. Visually rating the nitrogen status of corn. J. Prod. Agric. 6:41-46. doi:10.2134/jpa1993.0041