Data from a 3-yr experiment on ‘Ben Lear’ cranberries (Vaccinium macrocarpon Ait), by multiple stepwise regression at the 1% level, showed that N, P, and K applications increased their respective tissue levels. Tissue Ca and Mn were decreased by N applications in 1969; 1970 tissue Ca was decreased by applications of both N and P. Nitrogen, P, and K applications all tended to decrease 1969 tissue Mg.
Yield was increased by N applications in 1971. A cubic effect of N applications was noted in 1970 anthocyanin and soluble solids contents. Pooled data for 1970 and 1971 were fitted to linear and quadratic equations relating tissue levels to fertilizer applications and yield and quality measurements to tissue levels. Desirable tissue levels of N, P, K, Ca, Mg, Fe, and Mn are suggested.