Effect of population density on the yield of export-type white yams (Dioscorea rotundata Poir.)

2016 ◽  
Vol 10 (1) ◽  
Author(s):  
Dairo Javier Pérez Polo ◽  
Rodrigo Orlando Campo Arana
Keyword(s):  
Population Density ◽  
Block Design ◽  
Maximum Yield ◽  
Export Market ◽  
Population Increase ◽  
Cylindrical Shape ◽  
Dioscorea Rotundata ◽  
Randomized Complete Block Design ◽  
Export Competitiveness ◽  
The Impact

The limitations for yam crops destined for the export market include low yields per unit area and the production of deformed and overly large tubers that are rejected by the market, causing huge losses for small farmers. In order to increase the export competitiveness of yams, the effect of population density on the yield of white yams (D. rotundata cv. Brasilero) was evaluated. On the experimental farm of the Universidad de Córdoba, an experiment was conducted with a randomized complete block design and three replications using the following densities (treatments): 10,101; 22,727; 30,303 and 45,454 plants/ha, where the first treatment corresponded to the density used by producers (control). The following yield components were evaluated each time: number, shape, weight, size and production of export-type and non-export-type tubers. In addition, an economic analysis of the treatments was carried out to assess the impact of adoption. The export-type production increased as the population density increased, achieving the maximum yield with 30,303 plants/ha, surpassing the control by 197.75%; this population was also the most profitable, 116.67%. The shape, weight and size of the tubers were not affected by the population density; the cylindrical shape was the most frequent. It was concluded that the white yam cv. Brasilero population increase significantly influenced the number of export-type tubers per hectare, tripling the number, as well as increasing profitability

scholarly journals Effect of farrowing pen size on pre-weaning performance of piglets

2021 ◽  
Author(s):  
Katherine D Vande Pol ◽  
Austin L Laudwig ◽  
Aaron M Gaines ◽  
Beau A Peterson ◽  
Caleb M Shull ◽  
...  
Keyword(s):  
Litter Size ◽  
Block Design ◽  
Commercial Production ◽  
Experimental Unit ◽  
Pig Production ◽  
Time Period ◽  
Randomized Complete Block Design ◽  
The Impact ◽  
Cross Fostering ◽  
Size At Birth

Abstract Litter sizes in commercial pig production have increased substantially over recent years; however, farrowing pen sizes have generally not changed over the same time period. The objective of this study was to evaluate the effect of farrowing pen size on piglet pre-weaning growth and mortality. Differences in pen size were created by varying the width of pens of the same length, increasing the creep area available to the piglets. The study used a total of 1,786 litters in a randomized complete block design to compare two Farrowing Pen Size treatments (FPS): Standard (pen width 1.52 m) and Increased (pen width 1.68 m). Litter sizes were equalized across treatments (12.9 ± 1.95 piglets) at 24 h after birth using cross-fostering. Litter weights were collected at birth and weaning (21.3 ± 2.08 d); pre-weaning mortality was recorded. The experimental unit was the litter; models included FPS and replicate. Farrowing Pen Size had no effect (P > 0.05) on litter size at birth (12.8 and 13.0 for the Standard and Increased FPS, respectively), after cross-fostering (12.9 for both treatments), or at weaning (11.2 and 11.3, respectively). There was no effect (P > 0.05) of FPS on total litter or average piglet weight at birth, after cross-fostering, and at weaning. These results suggest no benefit in piglet performance from increasing the width of farrowing pens. As litter sizes continue to increase in commercial production, further research is warranted to re-evaluate the impact of farrowing pen size on pre-weaning mortality.

scholarly journals Plantain-Tree Rubber Intercropping Systems Improved Productivity in the Tropical Humid Zone of Ghana, West Africa

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Erasmus Narteh Tetteh ◽  
Eric Owusu Danquah ◽  
Akwasi Adutwum Abunyewa ◽  
Caleb Melenya Ocansey ◽  
Emmanuel Amoah Boakye ◽  
...  
Keyword(s):  
Population Density ◽  
Growth And Development ◽  
Positive Relationship ◽  
Cropping Systems ◽  
Block Design ◽  
Rubber Tree ◽  
Western Region ◽  
Optimum Population ◽  
Randomized Complete Block Design ◽  
Sole Cropping

A three-year field trial was conducted between 2014 and 2017 in the Ellembelle and Jomoro districts of the Western region of Ghana where rubber production is common to determine the optimum population density of plantain when grown in combination with immature rubber tree crops. The trials were arranged in a Randomized Complete Block Design with 3 replications. The treatments were sole rubber, sole plantain, and three intercrops of one row of plantain in between two rows of rubber, two rows of plantain in between two rows of rubber, and three rows of plantain in between two rows of rubber. The rubber clone used was GT1 while the variety of plantain used was false horn. The results showed that population density of plantain had significant effect on the growth of the associated rubber. Growing plantain at closer spacing of 1.5 m under the high-density plantain treatment significantly increased plantain yield compared to the other cropping systems. There was a significant positive relationship between population density of plantain and the rubber tree growth and development. The optimum population density of plantain when intercropped with rubber was 1,666/ha. The study showed intercropping was advantageous over sole cropping for both crops.

scholarly journals Tiller density and tillering on Brachiaria brizantha cv. Marandu pastures inoculated with Azospirillum brasilense

2017 ◽  
Vol 69 (4) ◽  
pp. 1039-1046 ◽  
Author(s):  
B.C. Pedreira ◽  
P.L. Barbosa ◽  
L.E.T. Pereira ◽  
M.A. Mombach ◽  
L.F. Domiciano ◽  
...  
Keyword(s):  
Population Density ◽  
Azospirillum Brasilense ◽  
Block Design ◽  
Experimental Period ◽  
N Fertilization ◽  
Appearance Rate ◽  
Randomized Complete Block Design ◽  
Opposite Behavior ◽  
Grass Sward ◽  
Tiller Density

ABSTRACT The objective of this study is to verify the population density and the dynamics of tillering in the Marandu palisade grass sward subjected to nitrogen (N) fertilization strategies, characterized by the N supply via urea or bacterial inoculant (Azospirillum brasilense). The treatments comprised of four nitrogen fertilization strategies: (A) Without fertilization, (B) 80 kg N/ha, (C) inoculant (A. brasilense), and (D) 80 kg N/ha + inoculant, distributed in a randomized complete block design, with three replications. The nitrogen supply strategies were evaluated during six periods: October, November, and December (2012) as well as January, March, and April (2013). The nitrogen dose or inoculant had no effect on the tiller appearance rate (TAR), tiller mortality rate (TMR), tiller survival rate (TSR), or tiller population density (TPD). However, these variables were influenced by the season. The TAR and TSR were higher at the beginning of the experimental period (October) and lower towards the end of the period (March-April), whereas, TMR and TPD exhibited the opposite behavior, with lower values in October and higher from January onward. Neither the nitrogen nor the inoculant influenced the population dynamics of the tillers in Marandu palisade grass.

scholarly journals Impact of Brushing and Infill Maintenance on Field Safety of Third Generation Synthetic Turf

Proceedings ◽  
2020 ◽  
Vol 49 (1) ◽  
pp. 34
Author(s):  
Kyley Dickson ◽  
John Sorochan ◽  
William Strunk ◽  
Taylor Williams
Keyword(s):  
High Performance ◽  
Block Design ◽  
Surface Hardness ◽  
Vital Role ◽  
Third Generation ◽  
Randomized Complete Block Design ◽  
Split Plot ◽  
Athletic Field ◽  
The Impact ◽  
Synthetic Turf

The objective of this study was to investigate the impact of brushing and infill maintenance of third generation (3G) synthetic turf on field safety. A split-plot randomized complete block design was used with six different fiber pile heights, infill depths, and shock pad combinations subjected to 120 games in the summer of 2017 at the Center for Athletic Field Safety (CAFS) in Knoxville, TN, USA. Traffic was applied with a CAFS traffic simulator. Half of the plots received maintenance every 20 games with a rotating power broom and infill applied to those below manufacturer’s recommendations. All 3G synthetic turf systems required maintenance to the same degree, and maintenance was necessary to keep surface hardness of 3G synthetic turf systems consistent and acceptable. Overall, field safety and consistency increased in this study due to maintenance, thus suggesting brushing and infill maintenance plays a vital role in maintaining high performance on 3G synthetic fields.

scholarly journals Growth assessment of juvenile oil palm (Elaeis guineensis Jacq.) intercropped with fruit vegetables in a rainforest zone of Nigeria

2020 ◽  
Vol 116 (2) ◽  
pp. 217
Author(s):  
Ayodele Samuel OLUWATOBI ◽  
Kehinde Stephen OLORUNMAIYE ◽  
Olabisi Fatimo ADEKOLA
Keyword(s):  
Oil Palm ◽  
Elaeis Guineensis ◽  
Growth Parameters ◽  
Block Design ◽  
Significant Difference ◽  
Randomized Complete Block Design ◽  
Ondo State ◽  
Oil Palms ◽  
The Impact ◽  
Growth Assessment

<p>Improper intercropping of <em>Elaeis guineensis</em> with other crops has impaired the growth and development of the oil palm due to competition for environmental resources. The study was conducted to investigate the impact of intercropping on the growth of juvenile oil palm for 2 years. The research commenced during the rainy season of 2016 at an established juvenile oil palm plantation in Ala, Akure-North Local Government of Ondo State. Four fruit vegetables were intercropped separately within the alley of the plantation at 1, 2 or 3 m away from the oil palms in a randomized complete block design. Growth parameters of the juvenile oils were assessed. Results revealed that at 16 weeks after intercropping (WAI), the intercropped oil palm recorded better growth performance with higher canopy spread, number of frond, number of leaflets and trunk height (218.20, 37.00, 87.48 and 38.17 cm) respectively, than the sole oil palms (214.67, 32.83, 72.89 and 31.67 cm) respectively. There were no significant difference in all the growth parameters examined except canopy height (<em>p</em> &lt; 0.05). Juvenile oil palm cultivated in rainforest agroecological zone of Nigeria can be intercropped with fruit vegetables without any deleterious effect when intercropped at minimum of 1 m away from the oil palms.</p>

scholarly journals Influence of mulching and plant spacing on growth and yield of french bean (Phaseolus vulgaris L.)

2015 ◽  
Vol 26 (2) ◽  
pp. 129-135
Author(s):  
MS Sahariar ◽  
MR Karim ◽  
MA Nahar ◽  
M Rahman ◽  
MU Islam
Keyword(s):  
Yield Components ◽  
Water Hyacinth ◽  
Block Design ◽  
Maximum Yield ◽  
French Bean ◽  
Growth And Yield ◽  
Plant Spacing ◽  
Phaseolus Vulgaris L ◽  
Treatment Combination ◽  
Randomized Complete Block Design

A field experiment was conducted at the Horticulture Farm of the Department of Horticulture, Bangladesh Agricultural University, Mymensingh to investigatethe effect of mulching and plant spacing on the growth and yield of French bean during the period from November 2014 to January 2015. The experiment consisted of three types of mulchingnamely (i) control (without mulch), (ii) water hyacinth and (iii) black ploythene much and three levels of spacing viz., (i) 30 cm x 25 cm (ii) 30 cm x 20 cm and (iii) 30 cm x 15 cm. The experiment was laid out in randomized complete block design with three replications. Results showed that both mulching and plant spacing significantly influenced the growth and yield components of French bean. Black polythene mulch produced the highest yield (5.82 t/ha) and the lowest yield (4.92 t/ha) was recorded fromno mulch treatment. The maximum yield (6.22 t/ha) was obtained from 30 cm x 15 cm plant spacing and the lowest (4.58 t/ha) was obtained with 30 cm x 25 cm plant spacing. The combined effects of mulching and plant spacing were statistically significant. The combination of black polythene mulch with 30 cm x 15 cm spacing gave the highest yield (6.97 t/ha) and the lowest yield (3.94 t/ha) was received from without mulching at spacing of 30 cm x 25 cm treatment combination. Considering the above findings the black polythene mulch with 30 x 15 cm plant spacing  may be recommendfor French bean cultivation.Progressive Agriculture 26 (2): 129-135, 2015

scholarly journals First evaluation of melon (Cucumis melo. L) landraces under high tunnel condition in Sistan

Genetika ◽  
2021 ◽  
Vol 53 (1) ◽  
pp. 121-130
Author(s):  
Mohammad Naroui Rad ◽  
Gholamali Keikha
Keyword(s):  
Factor Analysis ◽  
Block Design ◽  
Maximum Yield ◽  
Morphological Characteristics ◽  
Cultivation Condition ◽  
Research Station ◽  
High Tunnel ◽  
Five Factors ◽  
Randomized Complete Block Design ◽  
Cucumis Melo L

In order to evaluate a number of agro-morphological characteristics in 10 melon population, an experiment based on randomized complete block design with three replications was carried out in two years (2017-2018) at high tunnel condition at Zahak Agriculture Research Station. The relationships among the related traits evaluated using by statistical methods. The combined analysis of variance revealed highly significant differences among landraces in evaluated traits. A highly and significant correlation was observed between fruit width and yield (0.81**). Mean comparison using Duncan?s multiple rang test revealed that maximum yield belonged to landrace Zardeivanaki with 29160 kg/ha. Factor analysis was used for understanding the data structure and trait relations. The factor analysis showed that five factors explained 84% of the total variation among the traits. Therefore, the selection may be done according to the first component and it was helpful for a good breeding program for development of high yielding genotypes also landraces Dargazi, Zardeivanaki and Sabzsooski were placed very closely indicating that the responses of these landraces to be similar to high tunnel cultivation condition.

scholarly journals Effect of Different Rates of N and Intrarow Spacing on Growth Performance of Lettuce (Lactuca sativa L.) in Gurage Zone, Wolkite University, Ethiopia

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Bewuket Gashaw ◽  
Shewaye Haile
Keyword(s):  
Block Design ◽  
Maximum Yield ◽  
Dry Weight ◽  
Optimum Level ◽  
Plant Spacing ◽  
Fresh Weight ◽  
Randomized Complete Block Design ◽  
Main Effect ◽  
Demonstration Site ◽  
Four Levels

A field experiment was conducted in Wolkite University, Horticulture department practical demonstration site, from February to June 2019 with the objective of determining the optimum level of N and intrarow spacing for better growth of lettuce. The experiment consisted of four levels of N (N0 (0 kg/ha), N1 (50 kg/ha), N2 (100 kg/ha), and N3 (150 kg/ha)) and three levels of intrarow spacing (S1 (15 × 30 cm), S2 (20 × 30 cm), and S3 (25 × 30 cm)). The interrow spacing was maintained as 30 cm. The experiment was laid out in 3 × 4 factorial arrangement in a randomized complete block design (RCBD) and replicated three times. The main effect of nitrogen resulted maximum yield (9.45 ton/ha), dry weight per plant (28.75 g), and fresh weight per plant (57.57 g) which were recorded by the application of 150 kg/ha nitrogen. Likewise, the main effect of intrarow spacing gave maximum yield (8.01 ton/ha), dry weight per plant (21.31 g), and fresh weight per plant (59.15 g) from 25 × 30 cm plant spacing. For interaction effect, the highest yield (10.38 ton/ha), dry weight per plant (50.96 g), and fresh weight per plant (77.88 g) was found from N3S3 (150 kg/ha N and 25 × 30 cm plant spacing). Therefore, in the study, area using 150 kg/ha urea with 25 × 30 cm plant spacing could be advisable for optimum lettuce production.

Integrated use of phosphorus and organic matter improve fodder yield of moth bean (Vigna aconitifolia (Jacq.) under irrigated and dryland conditions of Pakistan

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
AMANULLAH . ◽  
ASIF IQBAL ◽  
ASAD ALI ◽  
MAZHAR IQBAL ◽  
IKRAMULLAH . ◽  
...  
Keyword(s):  
Organic Matter ◽  
Block Design ◽  
Farmyard Manure ◽  
Moisture Stress ◽  
Plant Residues ◽  
Vigna Aconitifolia ◽  
Moth Bean ◽  
Randomized Complete Block Design ◽  
Fodder Yield ◽  
The Impact

A field experiment was conducted to investigate the impact of phosphorus (30, 45 and 60 kg P ha-1) and organic matter (canola straw, berseem straw and farmyard manure) on growth and fodder yield of moth bean (Vigna aconitifolia Jacq.) under irrigated and dryland conditions. The experiment was conducted under two field conditions viz. (i) with irrigation and (ii) without irrigation (dryland). The experiment under each field condition was laid out in a randomized complete block design having three replications. The results revealed that P and organic matter treated plots (rest) under both irrigated and dryland conditions had better growth and produced higher fresh and dry fodder yields over control (no P and no organic matter applied). Moth bean planted under irrigated condition (no moisture stress) had improved growth, and produced higher fresh and dry fodder yields over dryland condition. Increasing the rate of P increased growth, fresh and dry fodder yields (60 kg P ha-1 > 45 kg P ha-1 > 30 kg P ha-1). Increase in growth, fresh and dry yields was obtained with the application of farmyard manure over plant residues incorporation. We concluded from this study that application of P at the highest rate of 60 kg P ha-1 along with farmyard manure (5 t ha-1) as source of OM improve growth and fodder yield of moth bean under irrigated and dryland conditions under semiarid climates.

scholarly journals Phenotypic performance of rice landraces under salinity stress in reproductive stage

2017 ◽  
Vol 28 (1) ◽  
pp. 1-6 ◽  
Author(s):  
MM Rashid ◽  
L Hassan ◽  
SN Begum
Keyword(s):  
Salt Stress ◽  
Salinity Stress ◽  
Stress Condition ◽  
Block Design ◽  
Maximum Yield ◽  
Salinity Treatment ◽  
Saline Condition ◽  
Salt Tolerant ◽  
Rice Landraces ◽  
Randomized Complete Block Design

An experiment was conducted using a randomized complete block design to explore the performance of rice landraces under salinity stress condition at Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh. The experiment was consisted of five replication and three different salt treatments viz., EC-6 dSm-1, EC-8 dSm-1, EC-12 dSm-1 with one control condition. Analysis of variance for yield and yield contributing traits showed significant (p<0.01) variation among the genotypes. The performance of all the landraces with respect to yield and yield contributing traits differed from each other under saline condition. Hogla, TalMugur, Nona Bokhra were identified as tolerant to salinity compared to check Binadhan-8, Binadhan-10 and BRRI dhan47 at 12 dSm-1 salinity treatment. All the traits under this study reduced in the salt stress except days to 50% flowering. In higher salt stress landrace Tal Mugur showed maximum yield followed by Ghunshi and Hogla. The findings of this study can be used for further study and also for developing salt tolerant rice varieties.Progressive Agriculture 28 (1): 1-6, 2017

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