scholarly journals UNREPLICATED VARIETY TRIALS: EFFECTS OF CHECK PLOT DENSITY AND FIXED VERSUS RANDOM TREATMENTS

2003 ◽  
Author(s):  
Tisha Maas ◽  
Jeanette Stafford ◽  
Boi Sebolai ◽  
David Marx ◽  
Daryl Travnicek ◽  
...  
Keyword(s):  
Variety Trials ◽  
Check Plot

University of Florida Potato Variety Trials Spotlight: ‘LaChipper’

EDIS ◽  
2017 ◽  
Vol 2017 (4) ◽  
Author(s):  
Rodrick Z. Mwatuwa ◽  
Christian T. Christensen ◽  
Pam Solano ◽  
Lincoln Zotarelli
Keyword(s):  
Potato Variety ◽  
University Of Florida ◽  
Variety Trials

by Rodrick Z. Mwatuwa, Christian T. Christensen, Pam Solano, and Lincoln Zotarelli http://edis.ifas.ufl.edu/hs1297

Efficiency of Spatial Analyses of Field Pea Variety Trials

Crop Science ◽  
2004 ◽  
Vol 44 (1) ◽  
pp. 49 ◽  
Author(s):  
Rong-Cai Yang ◽  
Terrance Z. Ye ◽  
Stanford F. Blade ◽  
Manjula Bandara
Keyword(s):  
Field Pea ◽  
Spatial Analyses ◽  
Variety Trials

Block designs for variety trials

1978 ◽  
Vol 90 (2) ◽  
pp. 395-400 ◽  
Author(s):  
H. D. Patterson ◽  
E. R. Williams ◽  
E. A. Hunter
Keyword(s):  
Block Designs ◽  
Incomplete Block ◽  
Variety Trials ◽  
Rectangular Lattices

SummaryIn this paper we present a series of resolvable incomplete block designs suitable for variety trials with any number of varieties v in the range 20 ≤v ≤ 100. These designs usefully supplement existing square and rectangular lattices. They are not necessarily optimal in the sense of having smallest possible variances but their efficiencies are known to be high.

scholarly journals Evaluating Hybrid Bermudagrass Using Spectral Reflectance under Different Mowing Heights and Trinexapac-ethyl Applications

2017 ◽  
Vol 27 (1) ◽  
pp. 45-53 ◽  
Author(s):  
Dana Sullivan ◽  
Jing Zhang ◽  
Alexander R. Kowalewski ◽  
Jason B. Peake ◽  
William F. Anderson ◽  
...  
Keyword(s):  
Spectral Reflectance ◽  
Management Practices ◽  
Cynodon Dactylon ◽  
Functional Performance ◽  
Lignin Content ◽  
Vegetation Indices ◽  
Variety Trials ◽  
Fiber Analysis ◽  
Green Cover ◽  
Aesthetic Performance

Quantitative spectral reflectance data have the potential to improve the evaluation of turfgrasses in variety trials when management practices are factors in the testing of turf aesthetics and functionality. However, the practical application of this methodology has not been well developed. The objectives of this research were 1) to establish a relationship between spectral reflectance and turfgrass quality (TQ) and percent green cover (PGC) using selected reference plots; 2) to compare aesthetic performance (TQ, PGC, and vegetation indices) and functional performance (surface firmness); and 3) to evaluate lignin content as an alternate means to predict surface firmness in turfgrass variety trials of hybrid bermudagrass [Cynodon dactylon × C. transvaalensis]. A field study was conducted on mature stands of three varieties (‘TifTuf’, ‘TifSport’, and ‘Tifway’) and two experimental lines (04-47 and 04-76) at two mowing heights (0.5 and 1.5 inch) and trinexapac-ethyl application (0.15 kg·ha−1 and nontreated control) treatments. Aesthetic performance was estimated by vegetation indices, spectral reflectance, visual TQ, and PGC. The functional performance of each variety/line was measured through surface firmness and fiber analysis. Regression analyses were similar when using only reference plots or all the plots to determine the relationship between individual aesthetic characteristics. Experimental line 04-47 had lower density in Apr. 2010, whereas varieties ‘TifTuf’, ‘TifSport’, and ‘Tifway’ were in the top statistical group for aesthetic performance when differences were found. ‘TifSport’ and ‘Tifway’ produced the firmest surfaces, followed by ‘TifTuf’, and finally 04-76 and 04-47, which provided the least firm surface. Results of leaf fiber analysis were not correlated with turf surface firmness. This study indicates that incorporating quantitative measures of spectral reflectance could reduce time and improve precision of data collection as long as reference plots with adequate range of green cover are present in the trials.

scholarly journals HOPS LIAISON COMMITTEE*: INTERNATIONAL HOP VARIETY TRIALS 1965-1967

1970 ◽  
Vol 76 (3) ◽  
pp. 223-234 ◽  
Author(s):  
J. F. Brown ◽  
F. C. Thompson ◽  
B. Trolle ◽  
F. Zattler ◽  
Birger Trolle
Keyword(s):  
Variety Trials ◽  
Liaison Committee

scholarly journals University of Florida Potato Variety Trials Spotlight: Atlantic

EDIS ◽  
2020 ◽  
Vol 2016 (3) ◽  
pp. 3
Author(s):  
Rodrick Z. Mwatuwa ◽  
Christian T, Christensen ◽  
Lincoln Zotarelli
Keyword(s):  
Potato Variety ◽  
Breeding Program ◽  
Season Length ◽  
University Of Florida ◽  
Variety Trials ◽  
Fact Sheet ◽  
Disease Information ◽  
Chipping Potato ◽  
White Mutant ◽  
The University

This article introduces the potato variety, ‘Atlantic’, which was tested in trials at the University of Florida.’Atlantic’ is a white-skinned, chipping potato commonly cultivated in Florida and resealed as a white mutant of the USDA breeding program. This three-page fact sheet provides the general characteristics, season length and growth information, fertilization and planting instructions, as well as disease information for the potato variety, ‘Atlantic’. Written by Rodrick Z. Mwatuwa, Christian T. Christensen, and Lincoln Zotarelli, and published by the Horticultural Sciences Department. http://edis.ifas.ufl.edu/hs1278

scholarly journals Sugarcane Variety Trials in Puerto Rico, 1951-55

1969 ◽  
Vol 41 (3) ◽  
pp. 147-160
Author(s):  
Ferdinand Méndez-Roig ◽  
George Samuels
Keyword(s):  
Puerto Rico ◽  
Puerto Rican ◽  
Sugarcane Variety ◽  
Commercial Variety ◽  
University Of Puerto Rico ◽  
Agricultural Experiment Station ◽  
North Central ◽  
Variety Trials ◽  
Agricultural Experiment ◽  
Entire Island

Sugarcane variety trials performed by the Agricultural Experiment Station, University of Puerto Rico, Río Piedras, P. R., During the period 1951-55, involved 19 separate experiments and 33 crops. The following results are significant: 1. In the production of available 96° sugar per acre B. 37161 was the outstanding variety of East and North Central cane areas of the Island. P.R. 980 was the leading variety in the Northwest, West, South, and Interior of Puerto Rico. 2. B. 40105, B. 37172, B. 41227, H. 328560, and P.R. 975 all were among the leading producers in tons of sugar per acre. 3. The check varieties M. 336, P.O.J. 2878, and P.R. 902, ranked poorly in the trials as compared with the leading varieties in tons of sugar produced per acre. 4. In terms of tons of cane per acre B. 37161 and P.R. 980 were the two leading varieties for the entire Island, with H. 328560, B. 41227, and B. 37172 also showing favorable cane-tonnage figures. All check varieties did poorly in tons of cane per acre as compared to the leading variety. 5. The varieties were also ranked according to their production of sucrose-percent- cane. P.R. 975 and B. 4362 were first and second, respectively. These two varieties also produced higher cane tonnage than the favored commercial variety M. 336, which ranked third. 6. Finally, the varieties were ranked according to the tons of sugar per acre produced per month, and P.R. 980 ranked first. The first eight experimental varieties produced over 0.60 ton of sugar per acre per month as compared with all commercial varieties, except B. 37161, which produced below 0.50 ton of sugar per acre per month. 7. The reluctance of Puerto Rican farmers to adopt the new cane varieties tested and proven superior to the old commercial varieties is very unprofitable to them. Yields are cited which show that if the land now used to grow the older cane varieties were planted to the new leading experimentally tested varieties discussed in this article, the present sugar crop in Puerto Rico could be produced on about two-thirds of the present acreage. This would release over 100,000 acres for other agricultural uses.

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