Nitrogen Fertilizer and Growth Regulator Impacts on Tuber Deformity, Rot, and Yield for Russet Potatoes

Table 2

Nitrogen rate main effect in 2009 for deformed tubers, rotten tubers as a percentage of total yield, marketable tuber yield, and total tuber yield for Russet potatoes grown on sandy loam soils in the Mid-Atlantic, averaged across Russet cultivars and N application timing.

Nitrogen rate	Deformed tubers	Rotten tubers	Marketable yield	Total yield
kg ha^−1	Percentage of tubers	Percentage of total yield	kg ha^−1
0^†	30.0	22.2	12728	15978
67	45.8 b^‡	33.2 a	12248 a	17360 b
134	54.2 ab	34.0 a	14884 a	21515 a
201	58.3 a	35.5 a	12862 a	19267 ab
268	61.5 a	35.7 a	12248 a	21507 a
LSD0.10	9.5	6.5	3053	3208
Pr > F	0.0445	0.8967	0.4200	0.0995

^†No-fertilizer control plots were not included in Analysis of Variance and are included for informational purposes only.
^‡Means within each dependent variable with the same letter are not significantly different (P ≥ 0.10, Fisher’s Protected LSD) and can be compared within column.