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Stephen L. Love and Asunta Thompson-Johns

Seed piece spacing is an important economic consideration in the production of potatoes (Solanum tuberosum L.). The optimum spacing varies with cultivar and intended market. A study was designed to determine the influence of seed piece spacing on yield, tuber size distribution, net returns, and stem and tuber density of three processing potato cultivars. Seed tubers of cultivars Russet Burbank, Frontier Russet, and Ranger Russet were planted 8, 15, 23, 31, 46, 61, 76, or 91 cm apart at two locations in 1988 and 1989. Total, marketable (U.S. No. 1), and midsize (226–452 g tubers) yield, tuber size distribution, net profits from a representative processing contract, and stem and tuber density (number per meters of row) were determined. All three cultivars achieved highest total yields at the narrowest (8 cm) spacing. Maximum marketable and midsize (226–452 g) yield occurred between 15 and 31 cm, depending on the cultivar. Size distribution shifted from a predominance of small tubers at narrow spacings to a predominance of large tubers at wide spacings, and the rate of shift was cultivar-dependent. `Russet Burbank' showed a broad range of optimal spacing for net returns, with a maximum in the range of 23 to 46 cm. Optima for `Frontier Russet' and `Ranger Russet' were between 15 and 46 cm. Of the four tuber measurements, midsize yield appeared to be best for determining optimum spacing. Marketable yield was also a useful measurement. All three cultivars gave maximum midsize yields at a stem density of 10.5 to 12.1 per meter of row and a tuber density of 23.9 to 24.9 per meter of row. Tuber density showed some promise as a predictor of optimum seed piece spacing for new cultivars.

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Samuel Y.C. Essah, Jorge A. Delgado, Merlin Dillon, and Richard Sparks

distribution and on tuber quality is not well documented. There remains a need for studies on the effect of different cover crops on potato total tuber yield and also on potato tuber size distribution and tuber quality. The goal of the present study was to

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Fernanda Souza Krupek, Christian T. Christensen, Charles E. Barrett, and Lincoln Zotarelli

adjusting seed piece spacing, no studies have been conducted on chipping potato cultivars for Florida. Understanding and predicting the effect of seed piece spacing on tuber size distribution, yield, physiological disorders, and economic performance will

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David Douches, Walter Pett, Diedrich Visser, Joseph Coombs, Kelly Zarka, Kimberly Felcher, Gurling Bothma, Johan Brink, Muffy Koch, and Hector Quemada

natural foliage die-back. The growth habit of both cultivars was assessed as semierect to spreading with strong growth, good to dense foliage cover, and a mature plant height of 40 to 50 cm. Based on the 2006–07 data, tuber size distribution was not

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Bielinski M. Santos and Persio R. Rodriguez

Stark J.C. Love S.L. Potato production systems University of Idaho Publ Moscow Love, S.L. Thompson-Johns, A. 2006 Seed piece spacing influences yield, tuber size distribution, stem and tuber density, and net returns of three processing potato cultivars

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Zhanao Deng and Brent K. Harbaugh

.3%) and in No.1 (49.7% vs. 25.3% to 43.3%) in 2006. In 2007, no significant differences in tuber size distribution were observed between ‘Summer Pink’ and the two commercial cultivars. These data indicate that ‘Summer Pink’ is as good as, or better than

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Zhanao Deng, Brent K. Harbaugh, and Natalia A. Peres

) each year. ‘Fiesta’. This cultivar was not significantly different from ‘Florida Fantasy’ or ‘White Queen’ in tuber weight, number of marketable tubers, and PI in 2007 and 2009. The tuber size distribution of ‘Fiesta’, ‘Florida Fantasy’, and ‘White

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Zhanao Deng, Brent K. Harbaugh, and Natalia A. Peres

‘Florida Red Ruffles’ and ‘Florida Sweetheart’ in tuber weight, production index, and marketable tubers, and it was superior to ‘Red Frill’ in all these assessments. In tuber size distribution, the majority (60% or more) of tubers for ‘UF-404’ were in the

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Renata L. Solan, Jed B. Colquhoun, Richard A. Rittmeyer, and Daniel J. Heider

Technol. 16 23 28 Bussan, A.J. Mitchell, P.D. Copas, M.E. Drilias, M.J. 2007 Evaluation of the effect of density on potato yield and tuber size distribution Crop Sci. 47 2462 2472 Challaiah, Burnside, O.C. Wicks, G.A. Johnson, V.A. 1986 Competition between

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Manpreet Singh, Rupinder Kaur Saini, Sukhbir Singh, and Sat Pal Sharma

, S.H. Agharezaee, M. Kamgar-Haghighi, A.A. Sepaskhah, A.R. 2014 Effects of dynamic and static deficit and partial root zone drying irrigation strategies on yield, tuber sizes distribution, and water productivity of two field grown potato cultivars Agr