scholarly journals Optimal plot size for experimental trials with Opuntia cactus pear

2019 ◽  
Vol 42 ◽  
pp. e42579
Author(s):  
Bruno Vinícius Castro Guimarães ◽  
Sérgio Luiz Rodrigues Donato ◽  
Ignacio Aspiazú ◽  
Alcinei Místico Azevedo ◽  
Abner José de Carvalho
Keyword(s):  
Selection Criteria ◽  
Production Cycle ◽  
Cactus Pear ◽  
The Third ◽  
Plot Size ◽  
Experimental Area ◽  
Experimental Variation ◽  
The Difference ◽  
Experimental Trials ◽  
Plot Design

The objective of the study with ‘Gigante’ cactus pear was to determine the size of plots that optimize the implementation of experiments with greater accuracy, spatial adequacy and efficiency of use of the experimental area by the Hatheway method (1961). The experiment was conducted in a uniform spacing of 2.0 x 0.2 m with 384 basic experimental units (BEUs). The vegetative descriptors were evaluated in the third production cycle. The coefficient of experimental variation (CVe) is the factor with the greatest influence for the experimental plot design; followed by the parameters - index d, which determines the difference to be detected between treatments; by the number of replications and, finally, by the number of treatments, which has the smallest effect on the plot size (BEUs). For the efficiency of use of the experimental area - EUEA, one can select larger plots (three BEU) with a lower number of repetitions (three) or smaller plots (two UEB) with a higher number of repetitions (10) with the same level of accuracy to evaluate the yield of ‘Gigante’ cactus pear. However, the selection criteria are based on the smallest experimental area, reflecting the maximum of EUEA. Useful plots with eight basic units are considered efficient for experiments with cactus pear.

scholarly journals PLOT SIZE AND SHAPE FOR FIELD TRIALS WITH FORAGE CACTUS PEAR

2021 ◽  
Vol 39 (2) ◽  
pp. 334-349
Author(s):  
Bruno Vinícius Castro GUIMARÃES ◽  
Sérgio Luiz Rodrigues DONATO ◽  
Ignacio ASPIAZÚ ◽  
Alcinei Místico AZEVEDO ◽  
Abner José de CARVALHO
Keyword(s):  
Soil Heterogeneity ◽  
Field Trials ◽  
Production Cycle ◽  
Index Number ◽  
Cactus Pear ◽  
Area Index ◽  
Size And Shape ◽  
Plot Size ◽  
Relative Information ◽  
Federal Institute

This study aimed to determine the size and shape of experimental plots that provide maximum precision using relative information method. This trial was conducted at the Federal Institute of Bahia. Plant height, cladode length, cladode width, cladode thickness, cladode area, cladode area index, number of cladodes, cladode total area and yield were measured in the third production cycle, 930 days after planting. The plants, defined as basic units, were arranged in 39 plot sizes so that the crop would fill the whole experimental area. Then, plot shapes with higher relative information and equal plot size in basic units were selected. The experimental plot with eight basic units in size ensures higher efficiency in the experimental evaluation. This combination between size and shape, besides meeting all evaluation requirements of the characteristics normally assessed in studies with forage cactus pear, has the maximum control of soil heterogeneity, thereby decreasing experimental error and significantly increasing precision.

scholarly journals Plot Size by the Variance Comparison Method for With ‘Gigante’ Cactus Pear

2019 ◽  
Vol 11 (18) ◽  
pp. 206
Author(s):  
Bruno V. C. Guimarães ◽  
Sérgio L. R. Donato ◽  
Ignacio Aspiazú ◽  
Alcinei M. Azevedo ◽  
Abner J. de Carvalho
Keyword(s):  
Hierarchical Classification ◽  
Comparison Method ◽  
Basic Unit ◽  
Experimental Accuracy ◽  
Cactus Pear ◽  
Area Index ◽  
Efficient Treatment ◽  
Treatment Assessment ◽  
Plot Size ◽  
Plot Design

Appropriate plot size is recognized as a means of maximizing experimental accuracy and contributes to efficient treatment assessment. This study aimed to estimate the optimal plot size for experiments with ‘Gigante’ cactus pears using the comparison of variances method (CVM). A uniformity trial was conducted to assess plant height (PH), number of cladodes (NC), yield (Y), cladode area index (CAI), cladode length (CL), width (CW), thickness (CT) and cladode area (CA) in a cactus pear crop. A rectangular-shaped plot consisting of 10 rows of 50 plants each was used, totaling 500 plants, with 384 basic units (BU), corresponding to the study area. A hierarchical classification approach was adopted, simulating a split-plot design in which each plant was denominated a basic unit (BU), and considering the effects of blocks (B), plots (P)/B, subplots (S)/P/B, rows (R)/S/P/B and plants (Pln)/F/S/P/B. This resulted in five plots sizes, consisting of 1, 12, 24, 48 and 96 basic units. Plots with 12, 24, 48 and 96 BU were statistically equal for the variables Y, PH, NC, CAI, CL, CW and CT, with lower variances than the plot with 1 BU. As such, 4.8 m² with 12 basic units is the optimal experimental plot size for ‘Gigante’ cactus pears.

scholarly journals Size of plots for experiments with cactus pear cv. Gigante

2019 ◽  
Vol 23 (5) ◽  
pp. 347-351 ◽  
Author(s):  
Bruno V. C. Guimarães ◽  
Sérgio L. R. Donato ◽  
Ignacio Aspiazú ◽  
Alcinei M. Azevedo ◽  
Abner J. de Carvalho
Keyword(s):  
Spatial Arrangement ◽  
Northeastern Brazil ◽  
Experimental Unit ◽  
Production Cycle ◽  
Mass Yield ◽  
Cactus Pear ◽  
Plot Size ◽  
Green Mass ◽  
Federal Institute ◽  
Green Mass Yield

ABSTRACT The definition of experimental plot size is an essential tool to ensure precision in statistical analysis in experiments. The objective of this study was to estimate the plot size for the cactus pear cv. Gigante using the Modified Maximum Curvature Method, under the semi-arid conditions of Northeastern Brazil. The uniformity test was conducted at the Federal Institute of Bahia, Guanambi Campus, Bahia state, Brazil, during the agricultural period from 2009 to 2011. The spatial arrangement was composed of ten rows with 50 plants each, whose evaluated area was formed by the eight central rows with 48 plants per row, making 384 plants and area of 153.60 m2. The following variables were evaluated: plant height; length, width and thickness of cladode; number of cladodes; total area of cladodes; cladode area and green mass yield in the third production cycle. In the evaluations, each plant was considered as a basic experimental unit (BEU), with an area of 0.4 m2, comprising 384 basic units (BU), whose adjacent ones were combined to form 15 pre-established plot sizes with rectangular shapes and in rows. The characteristics total area of cladodes and green mass yield require larger plot sizes to be evaluated with greater experimental accuracy. For experimental evaluation of cactus pear cv. Gigante, plot size should be eight plants in the direction of the crop row.

scholarly journals Optimizing fertigation of eggplant production in hydroponic coco-peat substrate

2020 ◽  
Vol 21 (2) ◽  
pp. 129-145
Author(s):  
Edouard Tabet ◽  
◽  
Reda Awali ◽  
Dalida Darazi ◽  
Chadi Hosri ◽  
...  
Keyword(s):  
Conventional Method ◽  
Plant Size ◽  
Fertilizer Application ◽  
Production Cycle ◽  
Limiting Factor ◽  
Average Mass ◽  
The Third ◽  
Maximum Value ◽  
High Investment ◽  
The Difference

This research aims at optimizing eggplant cultivation by comparing hydroponic fertigation recipes in coco-peat substrate with traditional soil cultivation. The first two groups of 36 plants each are fertilized according to the recipes recommended by two companies (A and B), treatments 1 and 2 respectively. The third is fertilized according to the conventional method in the soil adopted by farmers (group C). Company A applies standard fertilizer application protocol throughout the life of the plant with a stable pH and electro conductivity of 6 and 2.8 mS / cm respectively. Company B applies an upward fertilizer scheme during the plant's production cycle with a stable pH of 5.6, but an electro conductivity that varies from 2.1 mS / cm at the vegetative phase to 2.5 mS / cm from the appearance of the 1st fruit. Despite its high investment, the two hydroponic treatments T1 and T2 showed greater plant size (127 cm and 129 cm respectively at the 12th week), more fruits (15 fruits per plant each week, compared to 8 fruits per plant in the soil), and higher yield (average mass per plant reached a maximum value at the 11th week of 1.192 g for T1 and 1,189 g for T2 compared to 499 g for the soil). The difference in revenues shows a negligible financial advantage in favor of Company B. Adopting fertilization recipe of Company A or B is not a limiting factor at the financial level hence either one of the two formulations is adequate.

Ragam Bangunan Perundang-Undangan Hukum Keluarga di Negera-Negara Muslim Modern: Kajian Tipologis

2018 ◽  
Vol 11 (1) ◽  
pp. 49-60
Author(s):  
Miftahul Huda
Keyword(s):  
Saudi Arabia ◽  
United Arab Emirates ◽  
Islamic Law ◽  
Family Law ◽  
Marriage Law ◽  
The Third ◽  
Muslim Countries ◽  
Fourth Type ◽  
Modern Family ◽  
The Difference

The reality of the difference in applying Islamic law in the context of marriage law legislation in modern Muslim countries is undeniable. Tunisia and Turkey, for example, have practiced Islamic law of liberal nuance. Unlike the case with Saudi Arabia and the United Arab Emirates that still use the application of Islamic law as it is in their fiqh books. In between these two currents many countries are trying to apply the law in their own countries by trying to bridge the urgent new needs and local wisdom. This is widely embraced by modern Muslim countries in general. This paper reviews typologically the heterogeneousness of family law legislation of modern Muslim countries while responding to modernization issues. Typical buildings seen from modern family law reforms can be classified into four types. The first type is progressive, pluralistic and extradoctrinal reform, such as in Turkey and Tunisia. The second type is adaptive, unified and intradoctrinal reform, as in Indonesia, Malaysia, Morocco, Algeria and Pakistan. The third type is adaptive, unified and intradoctrinal reform, represented by Iraq. While the fourth type is progressive, unifiied and extradoctrinal reform, which can be represented by Somalia and Algeria.

Ragam Qiraat Al-Qur'an

SUHUF ◽  
2015 ◽  
Vol 2 (1) ◽  
pp. 53-72
Author(s):  
Ahmad Fathoni
Keyword(s):  
The Third ◽  
The Difference ◽  
The Way

The object of the study of the knowledge of the variety of the Quranic reading  is the  Qur'an itself. The focus is on the difference of the reading and its articulation. The method is based on the riwayat or narration which is originated from the Prophet (Rasulullah saw) and its use is to be one of the instruments to keep the originality of the Qur’an. The validity of the reading the Qur’an is to be judged based on the valid chain  (sanad ¡a¥ī¥)  in accord with the Rasm U£mānÄ« as well as with the  Arabic grammar. Whereas the qualification of its originality is divided into six stages as follow: the first is mutawātir, the second is masyhÅ«r, the third is āhād, the fourth is syaz, the fifth is maudū‘, and the six is mudraj. Of this six catagories, the readings which can be included in the catagory of mutawātir are Qiraat Sab‘ah (the seven readings) and Qiraat ‘Asyrah  (the ten readings). To study this knowledge of reading the Qur’an (ilmu qiraat), one is advised to know about special terms being used such as  qiraat  (readings), riwayat (narration), tarÄ«q (the way), wajh (aspect), mÄ«m jama‘, sukÅ«n mÄ«m jama‘ and many others.

Causation, Explanation, and the Metaphysics of Aspect

2018 ◽  
Author(s):  
Bradford Skow
Keyword(s):  
Background Condition ◽  
Structural Explanation ◽  
Levels Of Explanation ◽  
Lexical Aspect ◽  
The Third ◽  
Main Verb ◽  
The Difference ◽  
In Virtue Of

This book aims to answer the following questions: what is the difference between a cause and a background condition? What is it to manifest a disposition? Can dispositions be extrinsic? What is the most basic kind of causation? And, what might a structural explanation be? Each chapter takes up a subset of these questions; the chapters are written to be readable independently. The answers defended rely on three ideas. Two of those ideas use a distinction from the study of lexical aspect, namely the distinction between stative verbs and non-stative verbs. The first idea is that events go with non-stative verbs, in the sense that “If S, then an event occurred in virtue of the fact that S” is true when the main verb in the clause going in for “S” is non-stative. The second is that acting, doing something, goes with non-stative verbs, in the sense that “In Ving X did something” is true iff V is a non-stative verb. The third idea is about levels of explanation: “(A because B) because C” does not entail “A because C.”

Three Perspectives on Centrality

2020 ◽  
pp. 333-351
Author(s):  
Stephen P. Borgatti ◽  
Martin G. Everett
Keyword(s):  
Centrality Measures ◽  
Graph Invariant ◽  
Propagation Process ◽  
Centrality Measure ◽  
The Third ◽  
First Arrival ◽  
The Difference

This chapter presents three different perspectives on centrality. In part, the motivation is definitional: what counts as a centrality measure and what doesn’t? But the primary purpose is to lay out ways that centrality measures are similar and dissimilar and point to appropriate ways of interpreting different measures. The first perspective the chapter considers is the “walk structure participation” perspective. In this perspective, centrality measures indicate the extent and manner in which a node participates in the walk structure of a graph. A typology is presented that distinguishes measures based on dimensions such as (1) what kinds of walks are considered (e.g., geodesics, paths, trails, or unrestricted walks) and (2) whether the number of walks is counted or the length of walks is assessed, or both. The second perspective the chapter presents is the “induced centrality” perspective, which views a node’s centrality as its contribution to a specific graph invariant—typically some measure of the cohesiveness of the network. Induced centralities are computed by calculating the graph invariant, removing the node in question, and recalculating the graph invariant. The difference is the node’s centrality. The third perspective is the “flow outcomes” perspective. Here the chapter views centralities as estimators of node outcomes in some kind of propagation process. Generic node outcomes include how often a bit of something propagating passes through a node and the time until first arrival of something flowing. The latter perspective leads us to consider the merits of developing custom measures for different research settings versus using off-the-shelf measures that were not necessarily designed for the current purpose.

scholarly journals Increased risk of preeclampsia after use of paracetamol during pregnancy – causal or coincidence?

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Hetti von Hellens ◽  
Leea Keski-Nisula ◽  
Heidi Sahlman
Keyword(s):  
Third Trimester ◽  
Retrospective Case ◽  
Reverse Causation ◽  
Gestational Period ◽  
The Third ◽  
Precise Data ◽  
Increased Risk ◽  
Study Population ◽  
The Difference ◽  
Risk Of Preeclampsia

Abstract Background The maternal use of paracetamol during pregnancy has been associated with the development of preeclampsia. This study aims to clarify whether the connection is causal or whether it is due to reverse causation. Methods This study is a continuation of the retrospective case cohort study examining 2,508 pregnant women using a variety of drugs and the development of preeclampsia (1,252 women with preeclampsia and 1,256 controls). For the purposes of this study, more precise data was collected from several hospital databases of the women among this cohort who had reported taking paracetamol during pregnancy (indications, gestational period etc.); this was evaluated in association with the development of preeclampsia. Results 5.5% (100 cases and 37 controls) of all the study population (2,508) had clearly reported paracetamol use. Women with preeclampsia had used significantly more often paracetamol during pregnancy compared to controls (cases 8.0%, controls 2.9%, p < 0.001). The difference was most evident in the third trimester (after the 29th GW) and the use of paracetamol was associated with both mild and severe preeclampsia. Headache and “general pain” were the most common indications for medication among all paracetamol users. Conclusions The use of paracetamol in the third trimester of pregnancy was associated with preeclampsia. This observation indicates that association between paracetamol use and preeclampsia is probably due to reverse causation, i.e. women with preeclampsia experience more headaches due to preeclampsia symptoms since this association was not detected with the use of paracetamol in earlier stages of pregnancy.

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