b'(1.8)tomedium-largeforND1322Specificgravity, 0C-3 (4.3).Vine maturity differedan indirect meas-significantly,withameanof1.7ureoftuberdry (ratingscaleof1-5,with1beingmatter,ranged early and 5 very late). The range wasfrom1.0792for 1.0 for several selections, to 3.5 forND4100C-19 and ND13220C-3; early maturing geno- ND102917C-1to types with high yield potential are1.1040for important in our production regionND13220C-3; the duetotheshortgrowingseason.mean was 1.0894 Tubers per plant differed significant- (Table3).Clones ly for clone, with a range of 4.0 toweresampledat 11.9forND102917C-1andgrading,and ND13219C-4,respectively.Acrossstoredat5.5C all our trials, in 2021, reduced tuberand3.3C(42F numbers were noted.and38F)for eightweeks;an Yields were reduced significantly inadditionalsam- Chip samples from the 2021 Hoople Chip Processing trial, 2021 (Table 2) attributed to droughtplestoredatfollowing storage at 42F (5.5C) for eight weeks.conditions.Clonesvariedsignifi- 5.5Cwillbe cantly for total yield, with a range ofevaluatedinJunetodetermine3.3C(38F),chipcolorusingthe 138 cwt./acre for ND102917C-1 tolong-termstoragepotential.ChipUSDA color chart ranged from 6.3 403forND13220C-3.Thetrialscores from the field differed signif- for ND8331Cb-2 to 9.8 for Pike and mean was 221 cwt./acre, comparedicantly (Table 3), ranging from 1.4Snowden;themeanwas8.3. to 285 cwt./acre in 2020. Yield andforND7799c-1to3.8forFollowingeightweeksstorageat percentageA-sizedtubers(4-10ND092018C-2basedontheUSDA5.5C (42 o F), the USDA color chart ounce) also differed significantly forchip color chart, with a mean of 2.3.scoremeanwas6.2,rangingfrom clones.ThemeanyieldofAsizedHunterLabInstrumentL-values2.8 for ND1462ABC-1b to 10.0 for tuberswas103cwt./acre,andper- rangedfrom56to65forPike.centage A sized tubers was 46%; theND102917C-1andND8331Cb-2,rangeforyieldwas39cwt./acrerespectively;themeanwas61.Bruise potential, both blackspot and (ND102917C-3)to239cwt./acreFollowingeightweeksstorageatshatter bruise are reported in Table (ND13220C-3), while percentage As1.Blackspotbruisesareaquality rangedfrom23%(ND102921C-3) to 63% (ND102642C-2). Percentage undersizedtubers(0-4ounces) ranged from 18% for ND102642C-2The Insulation Placeto 76% for ND102921C-3; the mean14770 69th Place NEGrafton, ND 58237 was 45%. Very few oversized or USUrethane Spray-On InsulationNo. 2s and culls were noted during grading,although,similarlytoEliminates air infiltration & stops condensation2020,ND7519-1,ND7799c-1, Highest R-Value InsulationFire ProofingDakota Crisp, and Waneta produced Moisture BarriersFlat Roofsoversized tubers. ND102917C-1 had 35% US 2s and Culls due to signifi- Grafton(701) 352-3233 1-800-352-0620cant growth cracking.Bismarck(701) 255-0025 1-866-425-0025Website www.theinsulationplace.comMAY/JUNE 2022 POTATO GROWER 11'