Study of fertilizer placement and rates on winter wheat /
Griffith, D. R.,author.
Barber, Stanley A.,author.
Stivers, Russell K.(Russell Kennedy),1917-author.
Wiersma, D. J.(Daniel J.),1916-author.
Retzer, H. J.
Purdue University.Agricultural Experiment Station.
Caption title.
"April, 1965."
Winter wheat
Winter wheat