Individual control treatment in split-plot experiments

2009 ◽  
Vol 50 (4) ◽  
pp. 697-710 ◽  
Author(s):  
Are Halvor Aastveit ◽  
Trygve Almøy ◽  
Iwona Mejza ◽  
Stanislaw Mejza
Keyword(s):  
Control Treatment ◽  
Individual Control ◽  
Split Plot

scholarly journals Effect of Sodium Nitroprusside (SNP) on Minerals Content of Cabbage Brassica oleracea var. capitata L. Grown under Salt Stress

2019 ◽  
Vol 32 (2) ◽  
pp. 44-59
Author(s):  
Talib M. M. Al-Jarah ◽  
Awatif N. Jerry ◽  
Abbas M. Jasim
Keyword(s):  
Salt Stress ◽  
Sodium Nitroprusside ◽  
Brassica Oleracea ◽  
Mineral Content ◽  
Winter Season ◽  
Control Treatment ◽  
Potassium Sodium ◽  
Growing Seasons ◽  
Split Plot ◽  
Plot Design

The experiment was conducted during the winter season of 2017-2018 and 2018-2019 at directorates of agriculture in Al-Zubair district, Basrah, Iraq to study the effect of sodium nitroprusside (SNP) at four concentration (0, 50, 100 and 150) ?M with number of sprays (once and twice) and three cultivars (Pruktor F1, Luna and Rain ball F1) on mineral content of Nitrogen (N), Phosphorous (P), Potassium (K), Sodium (Na), Potassium/Sodium (K+/Na+) ratio, Chloride (Cl-), Sulfur (S) and Iron (Fe) of leaves. Split-Split Plot design was used with three replicates per treatment. The means of treatments were compared by L.S.D. at 0.05 probability. Results indicated that Pruktor F1 had the highest percentage of N, P, K, K+/Na+ ratio for both growing seasons while the highest accumulation of Na and Cl- in Rain ball F1 cultivar. Plants sprayed twice with SNP had a significant increase in P, K, K+/Na+ ratio, S, and Fe comparing with once spray for both growing seasons. PruktorF1 sprayed with SNP at 100 ?M twice time was superior in P, K, K+/Na+ ratio, S and Fe, whereas, the same cultivar at 150 ?M concentration was superior in N for both growing seasons, same cultivar at 100 and 150 ?M sprayed twice time gave the lowest percentage of Na+ and Cl–, respectively. Also Rain ball F1 at control treatment had the highest accumulation of Na and of Cl-.

scholarly journals EFFECT OF ETHEPHON CONCENTRATION AT DIFFERENT GROWTH STAGES ON YIELD AND ITS COMPONENTS OF WHEAT

2017 ◽  
Vol 48 (2) ◽  
Author(s):  
Al-Naqeeb & Hashim
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Growth Traits ◽  
Flag Leaf ◽  
Abu Ghraib ◽  
Control Treatment ◽  
Growth Stages ◽  
Split Plot ◽  
Biological Yield ◽  
Different Growth Stages

An experiments were carried out at the field of Crops Dept., Coll. of Agric., Univ. of Baghdad, Abu Ghraib during 2010-2011 and 2011-2012 seasons to study effect of foliar stages and concentrations of ethephon on some growth traits and the yield of wheat (Triticumaestivum L.) Abu Ghraib-3 var. A split plot arrangement according to RCBD was used with four replications. The main plots were spray ethephon with four stages according to Zadok's scale which is: one leaf throught the sheath (ZGS10), three leaves unfolded stage (ZGS13), elongation stage (ZGS30) and flag leaf ligue visible (ZGS39), and the sub-plots was ethephon spray with three concentrations (0.400, 0.600 and 0.800) Kg.ha-1 in addition to control treatment. The results showed that ZGS13 gave lowest mean for height plant (90.47 and 92.80) cm, while ZGS30 was superior in number of tillers (493.61 and 535.35) tiller.m-2, percentage of tillers carried of spike (78.83 and 81.21, number of spikes (389.64 and 636.80) spike.m-2, grain yield (4.07 and 4.32) ton.ha-1, biological yield (11.29 and 11.59)ton.ha-1 and harvest index (36.03 and 37.26)% for both seasons, respectively. Also, the results showed that 0.800 Kg.ha-1 produced lowest means for height plant (77.91 and 86.25) cm and lodging index (3.65 and 2.75), and this treatment (0.800 mg.L-1) gave highest means for number of tillers (499.22 and 540.99) tiller.m-2, percentage of tillers carried of spike (78.88 and 78.15)%, number of spikes (393.84 and 423.91) spike.m-2, grain yield (4.14 and 4.12) ton.ha-1, biological yield (11.47 and 11.70)ton.ha-1 and harvest index (36.11 and 37.62)% for both seasons, respectively. The interaction between ZGS30 and 0.400 Kg.ha-1ethephon gave highest percentage of tillers carried of spike (80.96%) in the first season only.     

scholarly journals Early Growth and Development of Pawpaw [Asimina triloba (L.) Dunal] Seedlings in the Greenhouse as Influenced by Shade and Root-zone Modification

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 532E-533
Author(s):  
Desmond R. Layne ◽  
L.N. Peters
Keyword(s):  
Growth And Development ◽  
Lateral Root ◽  
Root Zone ◽  
Plant Biomass ◽  
Lateral Roots ◽  
Incident Light ◽  
Light Level ◽  
Control Treatment ◽  
Whole Plant ◽  
Split Plot

This experiment was designed to determine the optimal light level for growing pawpaw seedlings in the greenhouse. In addition, we wanted to determine if modifying the root-zone would positively impact pawpaw seedling growth and development. Experimental treatments were imposed from seed sowing until the plants were destructively harvested. The experimental design was a split-plot, where blocking was done by position in the greenhouse. The main plot of the experiment was shade. This was accomplished by growing seedlings under a wooden frame covered with shadecloth to reduce incident light intensity received by the plant by 30%, 55%, 80%, or 95%. The control treatment was 0% shade or ambient greenhouse light level. The split-plot was root-zone modification. Half of all growing containers were untreated (control) while the other half were painted with SpinOut™, a commercially available product used to reduce root spiraling in nursery containers. There were 40 replicate seedlings per experimental treatment combination per block. Seedling shoot length and unfolded leaf number was recorded twice a week from seedling emergence until destructive harvest. Whole-plant leaf area was also determined. Leaves, stems, and tap and lateral roots were separated and dried to determine biomass partitioned to the respective organs. Up to 55% shade did not significantly reduce whole-plant biomass, while plants at 80% and 95% shade were stunted. Shade in the greenhouse is not required as was previously thought. Specific leaf mass and lateral root mass decreased as shade increased. Neither tap or lateral root dry weights were significantly affected by root-zone modification. New recommendations for container production of pawpaws in the greenhouse will be discussed.

scholarly journals Study of Varied Drip Irrigation and Fertigation Regimes on Curd Yield and Water Productivity of Cauliflower

2021 ◽  
pp. 105-110
Author(s):  
G. Sidhartha ◽  
Md. Latheef Pasha ◽  
M. Uma Devi ◽  
V. Ramulu
Keyword(s):  
Drip Irrigation ◽  
Water Productivity ◽  
High Water ◽  
Control Treatment ◽  
Irrigation Regime ◽  
Split Plot ◽  
Irrigation Levels ◽  
Plot Design

An experiment on cauliflower was carried out at Water Technology Centre, Rajendranagar, Hyderabad, Telangana during rabi 2019-2020. Experiment was laid out in split plot design with nine treatments consists of three drip irrigation levels (0.6, 0.8 and 1.0 Epan) as main plots and three NK fertigation levels (Control, 40:50 and 80:100 kg N and K2O ha-1) as subplots. The results revealed that drip irrigation at 1.0 EPan recorded significantly higher  curd yield ( 18.7 t ha-1) followed by 0.8 EPan ( 17.1 t ha-1) and lower curd yield ( 15 t ha-1) was obtained at 0.6 EPan.  Fertigation at 80:100 kg N - K2O ha-1 recorded significantly higher curd yield (23.8 t ha-1) than 40:50 kg N - K2O ha-1 (19.7 t ha-1) and  lower curd yield (7.2 t ha-1) was obtained in  control treatment. Higher water productivity (9 kg m-3) of cauliflower recorded at lower drip irrigation regime of 0.6 Epan than 0.8 (8 kg m-3) and lower water productivity (7.2 kg m-3) recorded at higher drip irrigation regime of 1.0 Epan. It was recommended that scheduling of drip irrigation at 1.0 Epan and fertigation scheduled at 80:100 kg N - K2O ha-1 to obtain higher curd yield where as high water productivity was observed in drip irrigation regime of 0.6 Epan.

A multicentre randomized controlled trial on trans-generational attention deficit/hyperactivity disorder (ADHD) in mothers and children (AIMAC): an exploratory analysis of predictors and moderators of treatment outcome

2019 ◽  
Vol 47 (1) ◽  
pp. 49-65 ◽  
Author(s):  
Charlotte Jaite ◽  
Betteke Maria van Noort ◽  
Timo D. Vloet ◽  
Erika Graf ◽  
Viola Kappel ◽  
...  
Keyword(s):  
Treatment Outcome ◽  
Primary Outcome ◽  
Controlled Trial ◽  
Specific Treatment ◽  
Externalizing Symptoms ◽  
Control Treatment ◽  
Comorbid Depression ◽  
Adhd Treatment ◽  
Mothers And Children ◽  
Maternal Adhd

Abstract. Objective: We examined predictors and moderators of treatment outcome in mothers and children diagnosed with ADHD in a large multicentre RCT. Method: In total, 144 mother-child dyads with ADHD were randomly assigned to either a maternal ADHD treatment (group psychotherapy and open methylphenidate medication, TG) or to a control treatment (individual counselling without psycho- or pharmacotherapy, CG). After maternal ADHD treatment, parent-child training (PCT) for all mother-child dyads was added. The final analysis set was based on 123 dyads with completed primary outcome assessments (TG: n = 67, CG: n = 56). The primary outcome was the change in each child’s externalizing symptoms. Multiple linear regression analyses were performed. Results: The severity of the child’s externalizing problem behaviour in the family at baseline predicted more externalizing symptoms in the child after PCT, independent of maternal treatment. When mothers had a comorbid depression, TG children showed more externalizing symptoms after PCT than CG children of depressive mothers. No differences between the treatment arms were seen in the mothers without comorbid depression. Conclusions: Severely impaired mothers with ADHD and depressive disorder are likely to need additional disorder-specific treatment for their comorbid psychiatric disorders to effectively transfer the contents of the PCT to the home situation (CCTISRCTN73911400).

Power of Modified Brown-Forsythe and Mixed-Model Approaches in Split-Plot Designs

Methodology ◽  
2017 ◽  
Vol 13 (1) ◽  
pp. 9-22 ◽  
Author(s):  
Pablo Livacic-Rojas ◽  
Guillermo Vallejo ◽  
Paula Fernández ◽  
Ellián Tuero-Herrero
Keyword(s):  
Repeated Measures ◽  
Statistical Power ◽  
Mixed Model ◽  
Covariance Structure ◽  
Simulation Method ◽  
Future Research ◽  
Repeated Measures Design ◽  
Fixed And Random Effects ◽  
Split Plot ◽  
High Level

Abstract. Low precision of the inferences of data analyzed with univariate or multivariate models of the Analysis of Variance (ANOVA) in repeated-measures design is associated to the absence of normality distribution of data, nonspherical covariance structures and free variation of the variance and covariance, the lack of knowledge of the error structure underlying the data, and the wrong choice of covariance structure from different selectors. In this study, levels of statistical power presented the Modified Brown Forsythe (MBF) and two procedures with the Mixed-Model Approaches (the Akaike’s Criterion, the Correctly Identified Model [CIM]) are compared. The data were analyzed using Monte Carlo simulation method with the statistical package SAS 9.2, a split-plot design, and considering six manipulated variables. The results show that the procedures exhibit high statistical power levels for within and interactional effects, and moderate and low levels for the between-groups effects under the different conditions analyzed. For the latter, only the Modified Brown Forsythe shows high level of power mainly for groups with 30 cases and Unstructured (UN) and Autoregressive Heterogeneity (ARH) matrices. For this reason, we recommend using this procedure since it exhibits higher levels of power for all effects and does not require a matrix type that underlies the structure of the data. Future research needs to be done in order to compare the power with corrected selectors using single-level and multilevel designs for fixed and random effects.

ESTIMATION OF CONSUMPTIVE USE OF POTATO CROP PIANTED UNDER DRIP IRRIGATION SYSTEM BY USING SWRT TECHNOLOGY

2020 ◽  
Vol 10 (1) ◽  
pp. 271-282
Author(s):  
J.N. Abedalrahman ◽  
R.J. Mansor ◽  
D.R. Abass
Keyword(s):  
Water Consumption ◽  
Drip Irrigation ◽  
Soil Depth ◽  
Irrigation System ◽  
Potato Crop ◽  
Block Design ◽  
Organic Fertilizer ◽  
Control Treatment ◽  
Drip Irrigation System ◽  
Spring Season

A field experiment was carried out in the field of the College of Agriculture / University of Wasit, located on longitude  45o   50o   33.5o   East and latitude 32o 29o 49.8o North, in Spring season of the agricultural season 2019, in order to estimate the water consumption of potato crop using SWRT technology and under the drip irrigation system. The experiment was designed according to Randomized Complete Block Design (RCBD) with three replications and four treatments that include of the SWRT treatment (the use of plastic films under the plant root area in an engineering style), and the treatment of vegetal fertilizer (using Petmos), organic fertilizer (sheep manure), and the control treatment . Potato tubers (Solanum tuberosum L.)  var. Burin was planted for spring season on 10/2/2019 at the soil depth of 5-10 cm. The highest reference water consumption for the potato crop during the season was calculated by Najeeb Kharufa, which was 663.03 mm. The highest actual water consumption for the potato crop during the season for the control treatment was 410.1 mm. The results showed increase in the values of the crop coefficient (Kc) in the stages of tubers formation and tubers filling stage as compared to the vegetative and ripening stages, ranged from 1.37-1.92 for the two stages of tubers formation and tubers filling. The SWRT treatment gave the highest water use efficiency during the season, was 3.46 kg m-3 .

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