The relationship between tuber size and hollow heart in Norgold Russet potatoes

1979 ◽  
Vol 56 (7) ◽  
pp. 329-337 ◽  
Author(s):  
D. C. Nelson ◽  
M. C. Thoreson ◽  
D. A. Jones
Keyword(s):  
Hollow Heart ◽  
Tuber Size ◽  
Norgold Russet ◽  
The Relationship

scholarly journals “The relationship between tuber size and hollow heart in norgold russet potatoes”

1979 ◽  
Vol 56 (9) ◽  
pp. 439-439
Author(s):  
D. C. Nelson ◽  
M. C. Thoreson ◽  
D. A. Jones
Keyword(s):  
Hollow Heart ◽  
Tuber Size ◽  
Norgold Russet ◽  
The Relationship

Relationships between tuber size and time of harvest to hollow heart initiation in Dryland Norgold Russet potatoes

1986 ◽  
Vol 63 (3) ◽  
pp. 155-161 ◽  
Author(s):  
D. C. Nelson ◽  
M. C. Thoreson
Keyword(s):  
Hollow Heart ◽  
Tuber Size ◽  
Norgold Russet ◽  
Time Of Harvest

Effect of seed tuber and seed piece size on growth and incidence of hollow heart in Norgold Russet potatoes

1982 ◽  
Vol 59 (8) ◽  
pp. 367-373 ◽  
Author(s):  
D. C. Nelson ◽  
M. C. Thoreson
Keyword(s):  
Seed Piece ◽  
Seed Tuber ◽  
Hollow Heart ◽  
Norgold Russet ◽  
Piece Size

Effects of defoliation and time of harvest on tuber dry-matter percentage of Pentland Crown Potatoes

1986 ◽  
Vol 107 (3) ◽  
pp. 723-733 ◽  
Author(s):  
S. J. Wilcockson
Keyword(s):  
Water Uptake ◽  
Dry Matter ◽  
Matter Content ◽  
Tuber Size ◽  
Dry Matter Content ◽  
Mechanical Method ◽  
Tuber Dry Matter ◽  
The Relationship ◽  
Time Of Harvest ◽  
Main Factor

Two experiments are reported which investigated the effects of time and method of crop defoliation and of extending the interval between defoliation and harvest on the relationship between dry-matter percentage and tuber size in Pentland Crown potatoes.Differences in average tuber dry-matter content between seasons and treatments were large, but the relationship between tuber dry-matter percentage and tuber size was always negatively quadratic. The dry-matter content of tubers of all sizes invariably decreased after defoliation, by about 0·6 % on average for each week that harvest was delayed in 1983 and 0·3 % in 1984. The largest decrease was from 22·7 to 16·7 % over the 10-week period following mechanical defoliation in mid-August 1983. In 1984, chemical defoliation in mid-August gave a smaller decrease than the mechanical method (0·25 and 0·38%/week) but their effects were similar when carried out in mid-September. Water uptake was the main factor responsible for the decrease because evidence showed that fresh weights of tubers increased proportionally following defoliation whilst dry weights remained virtually constant.Natural senescence was late in both seasons experiments so that the crops foliage was still mostly alive when defoliation occurred, even in September and early October. Thus, the relatively large effects of late defoliation may have been greater than might be expected where haulm senescence is already well advanced by this time and water uptake has almost ceased. Nevertheless, the decline in dry-matter percentage which may occur between defoliation and harvest can be extremely important where potatoes for processing are concerned. It could make them unacceptable for particular outlets and should be considered when defoliation and harvesting programmes are planned.

Effect of planting date, spacing, and potassium on hollow heart in Norgold Russet potatoes

1970 ◽  
Vol 47 (4) ◽  
pp. 130-135 ◽  
Author(s):  
D. C. Nelson
Keyword(s):  
Hollow Heart ◽  
Planting Date ◽  
Norgold Russet

Some effects of planting density and variety on the relationship between tuber size and tuber dry-matter percentage in potatoes

1974 ◽  
Vol 82 (2) ◽  
pp. 277-282 ◽  
Author(s):  
D. C. E. Wurr ◽  
E. J. Allen
Keyword(s):  
Size Distribution ◽  
Dry Matter ◽  
Tuber Size ◽  
Planting Density ◽  
Stem Density ◽  
Standard Analysis ◽  
Tuber Size Distribution ◽  
Tuber Dry Matter ◽  
Quadratic Response ◽  
The Relationship

SummaryThree experiments are reported which investigated the effects of planting density and variety on the relationship between tuber dry-matter percentage and tuber size. In the first experiment dry-matter determinations were made on samples of tubers less than 3·8 cm and greater than 3·8 cm from different planting densities obtained at eight fortnightly harvests. Standard analysis of variance was used for each harvest date and apart from Maris Piper giving consistently higher dry-matter percentages than Pentland Crown for the same tuber sizes, effects were small and difficult to interpret. The reasons for the problems in interpretation, which were mainly due to differences in tuber size distribution, are discussed.In the second and third experiments the effects of tuber-size distribution were removed by regression analyses of tuber dry-matter percentage on tuber size in definable grades and curves were fitted to the data. These curves revealed that tuber dry-matter percentage tends to show a quadratic response to increasing tuber size and is affected by variety and stem density. The significance of these results is discussed.

Factors affecting the relationship between tuber size and dry-matter content

1974 ◽  
Vol 51 (7) ◽  
pp. 233-242 ◽  
Author(s):  
O. P. Ifenkwe ◽  
E. J. Allen ◽  
D. C. E. Wurr
Keyword(s):  
Dry Matter ◽  
Matter Content ◽  
Tuber Size ◽  
Dry Matter Content ◽  
Factors Affecting ◽  
The Relationship

Relationship between Visual Injury from Synthetic Auxin and Glyphosate Herbicides and Snap Bean and Potato Yield

2014 ◽  
Vol 28 (4) ◽  
pp. 671-678 ◽  
Author(s):  
Jed B. Colquhoun ◽  
Daniel J. Heider ◽  
Richard A. Rittmeyer
Keyword(s):  
Size Distribution ◽  
Crop Yield ◽  
Total Yield ◽  
Application Rate ◽  
Potato Yield ◽  
Tuber Size ◽  
Target Movement ◽  
Snap Bean ◽  
Tuber Size Distribution ◽  
The Relationship

Agronomic crops with resistance to the herbicides dicamba and 2,4-D are currently in the regulatory approval process. The potential increased use of these herbicides has raised concern among vegetable producers about potential off-target movement and implications to crop yield. The overall goal of this research was to describe the relationship between visually estimated crop injury and snap bean and potato yield and quality. In snap bean in 2011, injury from dicamba 7 d after treatment (DAT) ranged from 19% at the 1.2 g ae ha−1application rate to 45% at the 7.0 g ae ha−1application rate. By 28 DAT in 2011, injury from 2,4-D was similar to the nontreated control. However, early-season injury in 2011 delayed snap bean flowering and reduced crop yield compared to the nontreated control for all treatments except where the 1.4 g ae ha−1rate of 2,4-D and glyphosate at 7.0 g ae ha−1were applied. Snap bean injury from dicamba was greater than that from 2,4-D at all rating timings in 2011 and two of three rating timings in 2012, and crop yield was reduced compared to where 2,4-D was applied and the nontreated control in both years. Potato tuber size distribution was variable and total yield did not differ among treatments and the nontreated control in 2011. In 2012, tuber size distribution was again variable, but more nonmarketable cull potatoes were harvested when dicamba was applied to 25-cm potato plants at the 7.0 g ae ha−1rate compared to any other treatment. Snap bean injury observations about 3 wk prior to harvest were strongly correlated with crop yield (r= −0.84 and −0.88 in 2011 and 2012, respectively), allowing time to make informed harvest decisions relative to crop quality. In contrast, the relationship between potato injury and tuber yield was poor and highly variable in both years.

scholarly journals Comparison of potato (Solanum tuberosum L.) tuber size distribution fitting methods and evaluation of the relationship between soil properties and estimated distribution parameters

2021 ◽  
pp. 1-15
Author(s):  
J. K. Mhango ◽  
W. Hartley ◽  
W. E. Harris ◽  
J. M. Monaghan
Keyword(s):  
Solanum Tuberosum ◽  
Size Distribution ◽  
Solanum Tuberosum L ◽  
Tuber Size ◽  
Regression Coefficients ◽  
Tuber Number ◽  
Tuber Weight ◽  
Relative Likelihood ◽  
Tuber Size Distribution ◽  
The Relationship

Abstract Accurate estimation of tuber size distribution (TSD) parameters in discretely categorized potato (Solanum tuberosum L) yield samples is desirable for estimating modal tuber sizes, which is fundamental to yield prediction. In the current work, systematic yield digs were conducted on five commercial fields (N = 119) to compare the Weibull, Gamma and Gaussian distribution functions for relative-likelihood-based goodness-of-fit to the observed discrete distributions. Parameters were estimated using maximum likelihood estimation (MLE) for the three distributions but were also derived using the percentiles approach for the Weibull distribution to compare accuracy against the MLE approaches. The relationship between TSD and soil nutrient variability was examined using the best-fitting model's parameters. The percentiles approach had lower overall relative likelihood than the MLE approaches across five locations, but had consistently lower Root Mean Square Error in the marketable tuber size range. Negative relationships were observed between the percentile-based shape parameter and the concentrations of Phosphorus and Nitrogen, with significant (non-zero-overlapping 95% confidence interval) regression coefficients for P (−0.74 ± 0.33 for distribution of proportional tuber numbers and −1.3 ± 0.62 for tuber weights). Stem density was negatively associated with the scale and mode of tuber number (regression coefficients −0.98 ± 0.63 and −1.08 ± 0.78 respectively) and tuber weight (regression coefficients −0.99 ± 0.78 and −1.04 ± 0.69 respectively) distributions. Phosphorus is negatively related to the scale of the tuber-number-based distribution while positively associating with the tuber weight distribution. The results suggest that excess P application was associated with the increase in small tubers that did not contribute significant weight to the final yield.

Relationships between weather, plant spacing and the incidence of hollow heart in Norgold Russet potatoes

1979 ◽  
Vol 56 (12) ◽  
pp. 581-586 ◽  
Author(s):  
D. C. Nelson ◽  
D. A. Jones ◽  
M. C. Thoreson
Keyword(s):  
Hollow Heart ◽  
Norgold Russet ◽  
Plant Spacing
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