scholarly journals Effects of Seed Tuber Size and Planting Density on the Tuber Number and the Individual Tuber Weight of Plants Grown from Potato Microtubers in Fields

2011 ◽  
Vol 80 (3) ◽  
pp. 292-301
Author(s):  
Shogo Tsuda ◽  
Motoyuki Mori ◽  
Akira Kobayashi ◽  
Akiko Takada ◽  
Norikazu Takada ◽  
...  
Keyword(s):  
Seed Tuber ◽  
Tuber Size ◽  
Planting Density ◽  
Tuber Number ◽  
Tuber Weight ◽  
The Individual ◽  
Individual Tuber

Determination of optimum tuber planting density in the potato varieties Pentland Squire, Cara, Estima, Maris Piper and King Edward

1992 ◽  
Vol 119 (1) ◽  
pp. 35-44 ◽  
Author(s):  
D. C. E. Wurr ◽  
J. R. Fellows ◽  
E. J. Allen
Keyword(s):  
Complex Analysis ◽  
Seed Tuber ◽  
Tuber Size ◽  
Planting Density ◽  
Potato Seed ◽  
Stem Density ◽  
Seed Tubers ◽  
Net Returns ◽  
Analysis Technique ◽  
The Cost

SummaryThirty-two experiments examining the effects of the weight and within-row spacing of potato seed tubers on graded tuber yields of five varieties were conducted on eight sites from 1980 to 1985. A complex analysis technique was used to combine these data and estimate the optimum tuber planting densities for different ratios of seed cost to small (40–60 mm) and large (60–80 mm) ware value. The same technique could be applied to any other combination of seed cost, ware size and ware value.The optimum tuber planting density decreased with increasing seed-tuber weight. Differences in optimum planting density between varieties were much greater with small (35 g) than with large (105 g) seed tubers and decreased as the cost of seed increased relative to the value of ware. As large ware became worth more than small ware the influence of increasing seed cost on the optimum density was reduced. As the value of large ware increased, net returns increased and the effect of seed cost on net returns was reduced. Mean tuber size decreased with increasing stem density at harvest and at the same stem density was lower in varieties producing more daughter tubers/stem. Changes of mean tuber size (μ) and the spread of yield across size grades (σ) with time were well described by parallel curves in different varieties. It is suggested that in future it may not be necessary to determine optimum tuber planting densities by complex experiments involving several seed-tuber weights and spacings. Instead μ and σ could be estimated from simple experiments and tuber spacings determined by comparison with control varieties.

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.

scholarly journals VARIABILTY AND STABILTY OF TUBER YIELD OF JERUSALEM ARTICHOKE (Helianthus tuberosus L.) / VARIABILIDAD Y ESTABILIDAD DEL RENDIMIENTO DE TUBERCULOS DEL TOPINAMBO / VARIABILITÉ ET STABILITÉ DU RENDEMENT DU TUBERCULE DE TOPINAMBUR

Helia ◽  
2001 ◽  
Vol 24 (35) ◽  
pp. 25-32 ◽  
Author(s):  
Janoš Berenji ◽  
Vladimir Sikora
Keyword(s):  
Tuber Yield ◽  
Jerusalem Artichoke ◽  
Tuber Size ◽  
Yield Stability ◽  
Tuber Number ◽  
High Yield ◽  
Helianthus Tuberosus ◽  
Variety Trial ◽  
Stable Performance ◽  
The Stability

SUMMARYThe objective of this paper was to estimate the genetic and ecological variation as well as the stability of tuber yield per plant, tuber number per plant and tuber size of Jerusalem artichoke based on the results of a variety trial carried out with 20 different Jerusalem artichoke varieties during the period of 1994-2000. Significant genetic as well as ecologycal variation was observed for all of the traits studied. The most promissing varieties showing high tuber yield combined with high yield stability were “BT-4”, “Violet Rennes” and “UKR 4/ 82”. It is encouraging that the highest yielding varieties exibited a rather stable performance over environments.

Yield and Yield Contributing Attributes Of Potato as Influenced by Vermicompost And Seed Tuber Size

2021 ◽  
Vol 19 (1) ◽  
pp. 71-79
Author(s):  
M Mostofa ◽  
TS Roy ◽  
R Chakraborty
Keyword(s):  
Seed Tuber ◽  
Maximum Yield ◽  
Potato Production ◽  
Tuber Size ◽  
Factor B ◽  
Yield Parameters ◽  
Study Results ◽  
Split Plot ◽  
Two Factors ◽  
Plot Design

Low yield is crucial bottleneck for potato production in Bangladesh. The application of vermicompost may enhance the yield of potato. The experiment was consisted of two factors, i.e., Factor A: - Vermicompost level (Vm1-4): Vm1: 0 t ha-1, Vm2: 3 t ha-1, Vm3: 6 t ha-1 and Vm4: 9 t ha-1; Factor B:- Tuber size (T1-5): T1: 5-10 g, T2: 10-20 g, T3: 20-30 g, T4: 30-40 g and T5: > 40 g. The experiment was conducted in a split-plot design with three replications. Vermicompost had significant effect on most of the yield contributing parameters investigated under present study. Results revealed that yield parameters increased with increasing vermicompost level irrespective of tuber size. Among the twenty (20) treatment combinations, vermicompost at the rate of 9 t ha-1 with tuber size > 40 g produced the maximum yield (31.33 t ha-1) that was 53.53 % higher than that of control with 3273.01 $ of monetary advantage. Therefore, present study suggests that potato growers may use vermicompost for increasing yield of potato in Bangladesh. SAARC J. Agric., 19(1): 71-79 (2021)

scholarly journals Transplanting Hybrid Potato Seedlings at Increased Densities Enhances Tuber Yield and Shifts Tuber-Size Distributions

2021 ◽  
Author(s):  
Luuk C. M. van Dijk ◽  
Michiel E. de Vries ◽  
Willemien J. M. Lommen ◽  
Paul C. Struik
Keyword(s):  
Tuber Yield ◽  
Seed Tuber ◽  
Total Yield ◽  
Cropping System ◽  
Potato Production ◽  
Size Class ◽  
Planting Density ◽  
And Shifts ◽  
Very High ◽  
Ridge System

AbstractTo contribute to the development of a novel cropping system for potato grown from greenhouse-derived seedlings from hybrid true potato seeds, planting density trials were carried out under normal Dutch agronomic conditions. For two consecutive years, 5-week-old seedlings of two experimental genotypes were transplanted into farmers’ potato production fields at two contrasting locations: a flat-bed system on sandy soil and a traditional ridge system on clay soil. Planting densities were 6.25, 12.5, 25, 50, 100 and 200 plants/m2 in the flat-bed system, and 3.125, 4.688, 6.25, 12.5, 25 and 50 plants/m2 in the ridge system. In general, increasing planting density of hybrid seedlings per area decreased tuber fresh weight per plant and reduced the number of tubers per plant. On a per hectare basis, an increased planting density resulted in increased total tuber yield and number of tubers up to very high densities, but finally both parameters levelled off. Highest total tuber yields harvested were 107 and 45 Mg/ha for the flat-bed and ridge system, respectively. On flat-beds, the optimal planting density for total yield was 50 plants/m2. On ridges, planting density interacted with year and genotype, resulting in an optimum planting density of 25 plants/m2 to reach the maximum total yield. Obtained yields in the commercial size classes Baby Baker (20 < size class ≤ 35 mm) and Seed Tubers (28 < size class ≤ 50 mm) were in general very high on the flat-beds, with a maximum Seed Tuber yield of 64 Mg/ha at 50 plants/m2. The current study showed that transplanted hybrid seedlings are feasible alternatives for seed-tuber-grown systems for certain potato outlets.

scholarly journals Effects of nitrogen on yield and chlorophyll of potato (Solanum tuberosum L.) cultivars

1970 ◽  
Vol 38 (2) ◽  
pp. 163-169 ◽  
Author(s):  
Semiha Güler
Keyword(s):  
Solanum Tuberosum ◽  
Tuber Yield ◽  
Solanum Tuberosum L ◽  
Total Yield ◽  
Correlation Coefficients ◽  
Tuber Number ◽  
Tuber Weight ◽  
Nitrogen Rate ◽  
Leaf Chlorophyll ◽  
Nitrogen Rates

Effects of nitrogen on the leaf chlorophyll (chl), yield and yield attributing characters of potato as tuber number and mean tuber weight were studied. Correlation coefficients between the investigated characters were determined. Five nitrogen rates (0, 150, 200, 250 and 300 kg/ha) and four potato cultivars (Burren, Slaney, Anna and Emma) were used in the study. First, second, third class tuber yields and total tuber yield, tuber number per plant, and leaf chl were significantly influenced by both nitrogen rate and cultivar, whereas mean tuber weight was affected only by cultivar. Maximum total yield was obtained at 200 kg N/ha. There was significant linear relationship between leaf chl and N applied (R2=0.91). There were significant correlations between chl and yield and yield related characters. Total yield significantly correlated with leaf chl. Correlations between first class yield and total yield as well as total yield and tuber number per plant were highly significant.   Key words: Potato; Solanum tuberosum L.; Leaf chlorophyll; Nitrogen; Yield DOI: 10.3329/bjb.v38i2.5141 Bangladesh J. Bot. 38(2): 163-169, 2009 (December)  

scholarly journals Effects of seed tuber size on the yield and quality of seven accessions of potato

2019 ◽  
Vol 17 (2) ◽  
pp. 200-205
Author(s):  
Md. Murad Hossan Chowdhury ◽  
Md. Amirul Islam ◽  
Md. Atikuzzamman ◽  
Maria Akter Sathi ◽  
Sharmin Jahan
Keyword(s):  
Seed Tuber ◽  
Block Design ◽  
Average Diameter ◽  
Tuber Size ◽  
Stem Diameter ◽  
Large Size ◽  
Yield And Quality ◽  
Two Factors ◽  
Minimum Number

A field experiment was carried out at the Horticulture Farm, Bangladesh Agricultural University, Mymensingh during the period from November 2011 to February 2012 to study the effect of seed tuber size on the yield and quality of seven accessions of potato. The experiment was laid out in the Randomized Complete Block Design (RCBD) with three replications. This piece of research consisted of two factors namely, size of seed tubers i.e. three different size of seed tuber i.e. small (10-20 g), medium (21-30 g) and large (31-40 g) and seven accessions of potato i.e. AC10064, AC10076, AC10097, AC10109, AC10123, AC10190 and one check variety Cardinal. The size of individual plot was 1.8 m × 1.2 m. Two adjacent unit plots and blocks were separated by 0.5 m and 0.5 m. A spacing of 60 cm × 30 cm was also used in terms of planting. Data on different yield contributing characters and yield were recorded. The tallest plants were produced by the large size of seed tuber accession AC10109 (120.25 cm) which also took minimum time (6.10 days) to germinate and possessed maximum stem diameter (0.95 cm) while small seed tuber of Cardinal required maximum days (10.23 days) along with shortest height (60.22 cm) as well as stem diameter (0.65 cm). The large size seed tuber of accession AC10109 gave maximum number of main stems/hill (6.4) and small size of seed tuber variety Cardinal gave minimum number of main stems/hill (2.96). The large size of seed tuber accession AC10109 produced maximum number of compound leaves/hill (64.80) and the small size of seed tuber Cardinal produced minimum number of compound leaves/hill (35.74). In terms of yield character large size of seed tuber of AC10109 accession exhibited highest results in tuber number 9.60 with the average diameter of tubers (5.86 cm) and yield was 10.42 t/ha. The accessions differed significantly with respect to all the plant characters studied. J. Bangladesh Agril. Univ. 17(2): 200–205, June 2019

scholarly journals Influence of seed tuber size and sprouting stage on the phytotechnical characteristics of the potato var. Ágata

2019 ◽  
Vol 13 (02) ◽  
pp. 282-286
Author(s):  
Alian Cássio Pereira Cavalcante ◽  
◽  
Maria Elisa Paraguassu Soares ◽  
Guilherme Antonio Vieira de Andrade ◽  
Carlos Diego da Silva ◽  
...  
Keyword(s):  
Seed Tuber ◽  
Tuber Size

Growth and Productivity of Tapioca (Manihot utilissima) IV. Devlopment and Yield of Tubers

1974 ◽  
Vol 10 (1) ◽  
pp. 9-16 ◽  
Author(s):  
C. N. Williams
Keyword(s):  
Growth Rate ◽  
Root Length ◽  
Stem Growth ◽  
Tuber Number ◽  
High Yield ◽  
Tuber Growth ◽  
Tuber Weight ◽  
Storage Tissue ◽  
Slowing Down ◽  
Tissue Cells

SUMMARYRoot measurements on three Malayan varieties of tapioca (high, medium and low-yielding clones) showed that the onset of tuberization brings about a slowing-down or cessation of growth in root length, but no changes in stem growth rate were associated with the onset of tuber growth. High yield was associated with high tuber weight rather than with tuber number, which could be related to the size of storage tissue cells formed by the root cambium. The process of tuberization in tapioca is discussed generally.

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