Allagash Russet, BelRus, Frontier Russet, HiLite Russet, Russet Norkot
ah and Russet Burbank were evaluated with preplant N fertilizer levels
of 0, 67, 134, 201, and 201 kg N/ha in a split application on a Knik
silt loam in 1990 and 1991 near Palmer, Alaska. BelRus and Russet Nork
otah yielded less marketable tubers than the other cultivars and Russe
t Burbank performed well under warm, dry 1990 conditions and poorly wh
en conditions were cool and wet (1991). Allagash, HiLite and Frontier
Russets were consistent producers with marketable tuber yields averagi
ng 35.4, 32.3, and 32.2 t/ha, respectively Marketable tuber yield was
maximized with approximately 175 kg total N/ha (residual soil plus app
lied) and approached 43 t/ha in 1990. Splitting the N application had
no significant effect on tuber yield. Newly released russets appear pr
omising for commercial Alaska producers.