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11 results for “Variability Coefficient”
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Research ArticleOpen accessEvery word in the titleA COEFFICIENT OF VARIABILITYManuel Martinez-PonsA coefficient of variability is described. It is shown that conducting all possible paired comparisons in a group of scores, the investigator can ascertain the group’s degree of variability as well as its converse, the group’s degree of homogeneity. The coefficient, useful in determining whether to divide a class into subgroups for the purpose of instruction, has the advantage that … …Journal of Mathematics and Statistics, Vol. 9, Issue 1 · 12 Apr 2013 · 7,110 accessesView PDFCite
Research ArticleOpen accessIn the abstractRelationship between Laboratory Germination and Biometric Parameters of Betula jarmolenkoana Golosk. AgletsZhandos Rakymbekov, Kurmankul Abayeva, Daniyar Dosmanbetov et al.This study evaluates the relationship between laboratory germination and biometric parameters of aglets of the critically endangered birch tree species Betula jarmolenkoana Golosk (Yarmolenko birch). The Yarmolenko birch is a very rare, narrowly endemic species, growing at an altitude of 1,900-2,100 m above sea level and only in the basins of three rivers (Kakpak, Bayynkol, and Tekes) in the Almaty … …OnLine Journal of Biological Sciences, Vol. 23, Issue 1 · 1 Mar 2023 · 4,915 accessesView PDFCite
Research ArticleOpen accessIn the abstractAssessment of Genetic Diversity among Elite Breeding Lines of Arabica Coffee (Coffea arabica L.) in Ethiopia using Simple Sequence Repeats MarkersTadesse Benti, Endale Gebre, Kassahun Tesfaye et al.Despite being the center of origin and genetic diversity, there has beenlimited application of molecular markers in arabica coffee breeding inEthiopia. In this study, the extent of genetic diversity and relationships of48 elite breeding lines of arabica coffee from different geographical originswere evaluated using 14 SSR markers. The SSR markers amplified 105 alleles ofwhich 104 are polymorphic with an average … …American Journal of Biochemistry and Biotechnology, Vol. 18, Issue 4 · 25 Nov 2022 · 6,011 accessesView PDFCite
Research ArticleOpen accessIn the abstractConformal Mapping of Temperature Variation in Compost HeapJonah Chukwuemeka Agunwamba, Oji Achuka NwokeLaboratory in vessel trapezoidal compost system was designed and constructed. Temperature variation in the compost heap was measured for five days at various depths. Mathematical model for the variation of temperature of the composting process was developed using Conformal Mapping Technique. One of the parameters in the model had two distinct roots, one a positive root and the other negative … …American Journal of Environmental Sciences, Vol. 12, Issue 3 · 17 Jun 2016 · 7,353 accessesView PDFCite
Research ArticleOpen accessIn the abstractPrice Volatility of Grains: Relationship with Crude Oil Price Using CCC-Multivariate GARCH ModelAreerat Todsadee, Hiroshi Kameyama, Shoichi ItoAgricultural commodities prices have increased and become significantly more volatile during the past few years periods. The high agricultural commodity prices in recent years have raised the question of whether or not volatility is increasing and leading to more frequent extreme price swings. It is very important to quantify price variability of agricultural products. This paper measures the volatility of … …American Journal of Economics and Business Administration, Vol. 6, Issue 4 · 2 Jan 2015 · 6,645 accessesView PDFCite
Research ArticleOpen accessIn the abstractAssessment of Soil Compaction under Center Pivot Irrigation Systems and its Effect on Crop PerformanceKhalid Ali Al-GaadiA field study on two 12.5 ha plots cultivated with wheat and alfalfa was conducted to determine Soil Compaction (SC), its spatial variability and its effect on crop performance under center pivot irrigation systems. Considering compaction at two tested soil depths, results revealed that the soil of the alfalfa plot exhibited significantly (p<0.01 and p<0.05 for 0 to 10 cm … …American Journal of Agricultural and Biological Sciences, Vol. 8, Issue 1 · 12 Mar 2013 · 7,721 accessesView PDFCite
Research ArticleOpen accessIn the abstractVariability and Genetic Structure in a Commercial Field of Tequila Plants, Agave tequilana Weber (Agavaceae)Martha Isabel Torres-Moran, Ana Paulina Velasco-Ramirez, Salvador Antonio Hurtado-de la Pena et al.Crops of the tequila plant (Agave tequilana) are produced mainly from offshoots of mother plants in established commercial fields. This propagation method is significant, as it is believed that it facilitates the spread of disease because of the crop’s low genetic variability and is also necessary because it is regulate the use of just that variety in tequila industry. Different … …American Journal of Agricultural and Biological Sciences, Vol. 8, Issue 1 · 22 Feb 2013 · 8,096 accessesView PDFCite
Research ArticleOpen accessIn the abstractVariability of Hydraulic Conductivity Due to Multiple FactorsSanjit K. Deb, Manoj K. ShuklaSoil properties are greatly influenced by intrinsic factors of soil formation as well as extrinsic factors associated with land use and management and vary both in time and space. Intrinsic variability is caused by the pedogenesis and usually takes place at large time scales. The variability caused by extrinsic factors could take effect relatively quickly and could not be treated … …American Journal of Environmental Sciences, Vol. 8, Issue 5 · 13 Aug 2012 · 10,228 accessesView PDFCite
Research ArticleOpen accessIn the abstractSpatial-Temporal Yield Trend of Oil Palm as Influenced by Nitrogen Fertilizer ManagementAbdul Rahim Anuar, Kah Joh Goh, Tee Bee Heoh, Osumanu Haruna AhmedOne of the major challenges in oil palm (Elaeis guineensis Jacq.) plantations today is proper interpretation of yield maps for site-specific management and identification and understanding of the causal factors influencing the variability of oil palm yields. A study was conducted to examine the structural yield variation in order to assess the spatial and temporal yield trends so as to … …American Journal of Applied Sciences, Vol. 5, Issue 10 · 31 Oct 2008 · 7,550 accessesView PDFCite
Research ArticleOpen accessIn the abstractSpatial Variability of Soil Inorganic N in a Mature Oil Palm Plantation in Sabah, MalaysiaAbdul Rahim Anuar, Kah Joh Goh, Tee Bee Heoh, Osumanu Haruna AhmedThe identification and understanding of soil factors influencing yield variability of oil palm enable their efficient management. Soil samples were therefore collected from a fertilizer response trial on oil palm to study the spatial inorganic N distribution and some selected soil chemical properties as affected by long-term N fertilizer applications. The experiment was conducted on mature oil palms grown on … …American Journal of Applied Sciences, Vol. 5, Issue 9 · 30 Sep 2008 · 7,689 accessesView PDFCite