Yield Of Potato Cultivars Research Articles

Effect of supplemental potassium application on growth and yield of potato cultivars

A trail was carried out to evaluate the effect of supplemental potassium application on growth and yield of potato cultivars at Horticulture Farm, The University of Agriculture Peshawar during winter season, 2014. The experiment was laid out on Randomized Complete Block Design, with split plot arrangement, using three replications. Potassium was kept in main plot while potato cultivars were kept in subplot. Four levels of supplemental potassium (0, 50, 75, 100 kg ha-1) were allotted to main plots, whereas sub plot factor consisted of potato cultivars (Rocko, Kuroda and Asterix). The supplemental potassium levels significantly influenced the growth and yield of potato cultivars. The maximum values for growth variables; plant height (45.82 cm) and survival percentage (89.56 %) and yield variables; number of small tubers plant-1 (4.56), number of medium tubers plant-1 (4.11), number of large tubers plant-1 (4.56), tuber weight plant-1 (463.67), yield (21.65 tons ha-1) were found in plot treated with supplemental potassium applied @ 75 kg ha-1. Among cultivars, the maximum values for growth variables; plant height (45.33 cm) and survival percentage (85.30 %) and yield variables; number of small tubers plant-1 (3.92), number of medium tubers plant-1 (3.33), number of large tubers plant-1 (3.83), tuber weight plant-1 (451.17), yield (21.15 tons ha-1) were found in cultivar Kuroda. Interaction between supplemental potassium levels and potato cultivars was found non-significant. Supplemental potassium should be applied @ of 75 kg ha-1 to potato crop. Among tested cultivars, the cultivar Kuroda showed better growth and yield under the agro-climatic region of Peshawar. Keywords: Solanum tuberosum L; Supplemental Potassium; Growth; Yield and Quality http://dx.doi.org/10.19045/bspab.2019.80096

Correction: Responses of Canopy Growth and Yield of Potato Cultivars to Weather Dynamics in a Complex Topography: Belg Farming Seasons in the Gamo Highlands, Ethiopia: Agronomy 2019, 9, 163

In Minda et al. [1], an error was introduced. We propose the following amendment: Figure 9, inSection 3.2.4 (Days to Maturity and Yield), should be replaced by the following updated figure [...]

Responses of Canopy Growth and Yield of Potato Cultivars to Weather Dynamics in a Complex Topography: Belg Farming Seasons in the Gamo Highlands, Ethiopia

Potato is an increasingly important crop in Ethiopia. The Gamo Highlands are one of the large potential potato producing regions in Ethiopia. The growing conditions are different from those in the temperate regions, where most of the agronomical expertise on potato has been developed. The influence of environmental conditions on the crop in the Gamo Highlands is poorly understood. We conducted field trials with eight potato cultivars in six locations and during two seasons. The canopy cover (CC) and plant height (PH) were measured with high temporal resolution and tuber yields were assessed as well. The experiments were conducted near our newly installed weather stations at different elevations. CC and PH were strongly correlated with temperature sum (Tsum). Tuber yields differed among elevations and cultivars. Nevertheless, these differences were poorly explained by environmental variables. We also found that no single cultivar performed best at all elevations. The number of branches was a predictor of yield, suggesting that radiation interception was limiting tuber growth. Tuber yield was optimal when the number of days to crop maturity was around 100–110 days. We conclude that Tsum is a predictor of crop growth, but environmental variables poorly explain yield variations, which calls for further investigation.

Quantification of crop weather relationship and the effect of different planting dates on growth and yield of potato cultivars in a sub-tropical environment at Hisar

Field experiments were carried out at research farm of Department of Agricultural Meteorology, CCSHAU, Hisar during Rabi seasons of 2016-17 to quantify crop weather relationship and the effect of different planting dates on growth and yield of potato cultivars in a sub-tropical environment at Hisar. The experimental field was adjacent to Agro-meteorological observatory at 290 10' N latitude, 750 46' E longitude and altitude of 215.2 m. The main plots treatments consisted four date of sowing viz. D1- 8th Oct., D2-22th Oct., D3- 5th Nov. and D4- 23rd Nov. The sub-plots treatment consisted of three varieties (V1- Kufri Bahar, V2- Kufri Pushkar and V3- Kufri Surya). The forty eight treatment combinations were tested in split plot design with four replications. The results revealed that various growth and yield observations were recorded higher in second sown crop (22th Oct.) as followed by other planting dates. The maximum tuber yield were produced in D2 (20810.45 kg/ha) and it was least in D4 (14525.46 kg/ha). Among the varieties, Kufri Pushkar recorded highest tuber yield (21478.06 kg/ha) followed by Kufri Bahar (17432.26 kg/ha) and Kufri Surya (15378.11 kg/ha). In crop weather relationship, Tuber yield and plant height were significantly positively correlated with rainfall (0.80 and 0.92) and rainy days (0.50 and 0.53). Evening relative humidity was also positively correlated with LAI (0.59) and tuber yield (0.78) of potato. Vegetables production is considered to be particularly important in satisfying world food demand. Specific research therefore is needed in order to evaluate the effects of environmental factors that crop encounters during its growth period and its production.

Potato cultivar BRS F63 Camila has higher yield at lower plant spacing

ABSTRACT The plant management used in potato crop is usually similar across the main producing regions in Brazil. Same plant spacing are commonly used, despite the differences in climate and soil of the various potato planting areas. The objective of this work was to evaluate the yield of potato cultivars in response to different plant spacing. Experiments were conducted in the field, and the treatments consisted of three cultivars (Agata, BRS Clara and BRS F63 Camila) and three plant spacing (20, 25 and 30 cm) in randomized blocks with three repetitions in two years. The total, marketable and non-marketable tuber yield, total and marketable number of tubers per area and size class, mean total and marketable tuber weight and percentage of tuber dry weight of the tubers were evaluated. Camila was the cultivar with highest yield when spaced 20 cm due to the greater number of tubers in the marketable class 100-200 g. In the 25 and 30 cm plant spacing, there was no difference in yield among cultivars. Depending on the cultivar and the destination of the harvested tubers, producers can choose the most appropriated plant spacing.

Does planting time affect the nutritional demand and yield of potato cultivars?

ABSTRACT: Determining the level of absorption of nutrients in the potato crop at different stages of development is important because it allows identification of the time when the elements are most required by plants. The objective of this research was to evaluate the level of nutrient absorption in cultivars after different planting times. Field experiment was conducted in Guarapuava-PR. Treatments consisted of three cultivars (Agata, BRS Clara, and BRS F63 Camila) and two planting times (October and February), in randomized blocks, with three replications in the crop season 2015/16. The total macro and micronutrient content (leaves, stems, and tubers) was quantified at 15 and 45 days after plant emergence. The total dry weight of plants was verified at 45 days after emergence. At harvest, dry weight of tubers, and total and commercial yield was recorded. It was observed that BRS F63 Camila produced a higher total dry weight of plants at 45 days after emergence, and higher dry weight of tubers at harvest because of the higher accumulation of Fe, Mn, and Zn following the October planting. The BRS Clara produced higher total dry weight and higher dry weight of tubers following February planting with higher Ca and S accumulation. Depending on the developmental period and planting time, cultivars differed in nutrient accumulation and tuber dry weight production. Greater nutritional demand and higher yield occurred following the October planting.

Effect of humic acid on different cultivars of potato tubers (Solanum tuberosum)

To evaluate the effect of humic acid fertilizer on the yield of potato cultivars in the climatic conditions of Damavand, a factorial experiment based on randomized complete block design with three replications was conducted. Treatments included a humic acid at three levels (non-use, single-and double-consumer) and the three levels (Agria, Sante and potato), respectively. Number of leaves, chlorophyll A and B, carotenoids, wet bulb and dry bulb and tuber yield per plant was measured. Between cultivars in tuber yield per plant was significant at the 1% difference and Agria had the highest yield and the lowest Sante. The humic acid levels in terms of tuber yield differences were observed in the 1% significance level, the highest yield of humic acid was consumed twice. Interaction effect showed the highest yield for the treatment of humic acid is consumed twice Agria. Research results indicate that the performance by the use of humic acid and humic acid no significant difference between once-and twice the performance of Agria tubers than the usual is no longer in Islamabad.

Effect of NPK on Vegetative Growth and Yield of Desiree and Kufri Sindhuri Potato

A field experiment was carried out to assess the effect of NPK on vegetative growth and yield of potato cultivars; Kufri Sindhuri and Desiree at different nutrient levels (0:0:0, 50:50:50, 100:50:50, 100:75:50, 100:75:100, 100:100:100 and 150:100:100 N, P205 and k20 kg ha-1) in sandy loam soils at Rampur, Chitwan, Nepal during 1999/2000. The experiment was laid out in a split plot design with 4 replications. Plant height, number of stems, fresh weight of stem and leaves were recorded at 15 days interval during crop growth period and tuber yield at maturity stage. Kufri Sindhuri was taller than Desiree at all the stages of plant growth. Increasing levels of NPK increased the plant height by 15-42 percent. The levels of NPK imparted to a significant effect on fresh weight of leaves and stems at each successive stages of crop growth. Kufri Sindhuri responded nitrogen up to 150 kg ha-1 while Desiree yielded higher at 100:100:100 kg NPK ha-1. The yield increase of potato tuber was associated with increase in the plant height, fresh weight of leaves and stems as a result of applied NPK.Nepal Agric. Res. J. Vol. 9, 2009, pp. 67-75DOI: http://dx.doi.org/10.3126/narj.v9i0.11643

Effect of Defoliation by Simulated Hail Damage on Yield of Potato Cultivars with Different Maturity Performed in Spain

Worldwide, potato (Solanum tuberosum L.) crops cover 18 × 106 ha, corresponding to a production of 314 × 106 t. The importance of this crop makes it crucial to control production losses and quality defects due to foliar injury, whether by natural or mechanical causes. The artificial defoliation of potatoes is a common technique used to investigate the correlation between damage caused by either hail or insects and yield. The aim of this study was to evaluate simulated hail damage on different cultivar potatoes of varying maturity to quantify the commercial yield reduction attributable to different defoliation levels through the potato crop cycle. Eight trials were carried out in the Central Ebro Valley (northern Spain) over a period of 4 years with three potato cultivars: Jaerla, Red-Pontiac, and Baraka. Four levels of defoliation (no defoliation, slight defoliation, medium defoliation, and high defoliation) were carried out in several phenological stages. The crop yield losses for each level of defoliation were calculated by correlating the percentage of defoliation applied and the resulting percentage of yield loss. Yield reduction equations were calculated for each trial and phenological stage. Damaged produced during tuber formation or flowering considerably reduced yield. In contrast, defoliations after tubers had completed growth barely affected yields. Differences among cultivars with respect to yield losses were noted regardless of location and year. The early cultivar (Jaerla) recovered worse than the longer-cycle varieties (Red Pontiac and Baraka) as concerns defoliation effects. Effects on yield were similar at the different locations. The regression equations presented may be used for modeling the yield reduction due to defoliation treatments caused by different biotic and abiotic agents.

Screening Potato Varieties for Tuber Production in Arid Regions: Effect of Planting Date on Yield Potential

The effect of tuber planting date on yield of potato cultivars was examined during three seasons. Planting date had a significant effect on yield, although cultivars showed significant variation in yield potential at the different dates. Varietal yield was significantly correlated with planting date and thus was probably a response to changing temperatures during the growing season. The yield increase in some cultivars was attributable to greater tuber number; in others it was because of greater tuber weight. Cultivars Vivaldi, Carlita, Bydand, Donald and Sterling were identified as having the potential for general cultivation in the arid climate of the Arabian Gulf. The results are discussed in terms of a national strategy for potato production, possibly involving a delay in planting date from mid November to mid December, allowing greater land use efficiency during the short cropping season.

Growth and Yield of Potato Cultivars in Spring Cropping. I. Plant morphology, growth, assimilate partitioning and yield under two planting densities.

Response of potato genotypes (Solanum tuberosum L.) to increase in planting density was examined. Three potato cultivars (Irish Cobbler, May Queen and Dejima) and two planting densities (5 and 10 plants per m2) were employed. Increase in planting density caused the main stem length to increase and the number of branches and the leaf area per plant to decrease irrespective of the cultivar. Stolon growth and number of stolons per plant was not affected by increase in planting density, but the percentage of productive stolons was decreased by increase in planting density. During the experimental period, all cultivars showed upward trends in crop growth rate (CGR), net assimilation rate (NAR), tuber growth rate (TGR) and economic assimilation rate (EAR) under both densities. Plants under high density had higher TGR and EAR values and achieved them at an earlier stage than those under low planting densities. Increase in planting density decreased the dry weights per plant of leaves, stems and tubers but it increased dry weights per unit area. Percentage of dry matter partitioned to the tubers was high under high planting density. High density increased total and marketable tuber yield per unit area but decreased per plant yield of all three cultivars. High density markedly reduced both average tuber weight and average marketable tuber weight. Dejima outyielded the other cultivars. Range of optimum planting densities for marketable tubers will be higher for Dejima than Irish Cobbler and May Queen.

Analyses of the effects of potato cyst nematodes (Globodera pallida) on growth, physiology and yield of potato cultivars in field plots at three levels of soil compaction

SummaryField experiments were carried out in 1991 and 1992 on sandy soil highly infested with the potato cyst nematode Globodera pallida. Half the trial area was fumigated with nematicide to establish two levels of nematode density. Three levels of soil compaction were made by different combinations of artificial compaction and rotary cultivation. Two potato cultivars were used in 1991 and four in 1992.Both high nematode density and soil compaction caused severe yield losses, of all cultivars except cv. Elles which was tolerant of nematode attack. The effects of the two stress factors were generally additive. Analysis of the yield loss showed that nematodes mainly reduced cumulative interception of light while compaction mainly reduced the efficiency with which intercepted light was used to produce biomass. This indicates that nematodes and compaction affect growth via different damage mechanisms.Nematodes reduced light interception by accelerating leaf senescence, by decreasing the specific leaf area and indirectly by reducing overall crop growth rate. Partitioning of biomass between leaves, stems and tubers was not affected by nematode infestation but compaction decreased partitioning to leaves early in the growing season while increasing it during later growth stages.The effects of nematodes and compaction on root length dynamics and nutrient uptake were also additive. This suggests that the commonly observed variation in yield loss caused by nematodes on different soil types is not related to differences in root system expansion between soils of various strength.Cv. Elles, which showed tolerance of nematodes by relatively low yield losses in both experiments, was characterised by high root length density and thick roots. These characteristics did not confer tolerance of soil compaction, since compaction affected root lengths and tuber yields equally in all cultivars.In the first experiment only, high nematode density led to decreased root lengths and lower plant nutrient concentrations. The yield loss which occurred in the second experiment was attributed to the effects of nematodes on other aspects of plant physiology.