Growth - Model to characterize pathogenic bacterial populations in dry beans and to evaluate cultivar effects on the parameters is being developed. Research was initiated on the design of experiments needed to utilize new feed collection technology to analyze the time-series aspect of feed data analysis and the use of time-series concepts to characterize intra-pen competition among animals.Impacts(N/A)Publications, Progress 01/01/80 to 12/30/80OutputsAbout 1485 conferences were held with Experiment Station staff members and graduate students to assist in the design, analysis and interpretation of agricultural experiments. McNeil, French, R., Hein, G.L., Baneziger, P.S., Eskridge, K.M. plant scientist, grower or processor), extending these models to multiple-trait selection using nonparametric approaches and assessing the robustness of the models. 2005. generalized linear mixed models, nonlinear models, Bayesian methods, recent developments in statistical design, state-of-the-art methods for computational biology and genomic analysis). I. International Journal of Geographical Information Science. Papadopoulos, F., C. Prochaska, A. Papadopoulos, K. M. Eskridge and I. Kalavrouziotis. tight budgets, dwindling faculty due to hiring slow-downs) and more accurate inference to be drawn from data that are available. Published results from the experiments are listed under various Experiment Station projects. Schmitz JA, Vogt RJ, Rupp GP, Brodersen BW, Abel JM, Wohlers AR, Marx DB. J Bacteriol, Department of Food Science and Technology, University of Nebraska, Lincoln, NE 68583-0919, USA., 2009, Vol. Standardization in the application of statistical methods, including generation, collection (planning and design), analysis, presentation and interpretation of data. (CD publication) 819-833. Agricultural researchers: use of statistical design and analysis is fundamental to their work. This will reduce cost of experimentation as well as increase efficiency. A model has been developed using chaos theory to help explain animal response to heat stress. Brown, D. J., Clayton, M. K., and McSweeney, K. 2004. Human influence on California fire regimes. The application of statistical principles and methods is necessary for effective practice in resolving the different problems that arise in the many branches of agricultural activity. The application of appropriate statistical methods and procedures in agricultural research can help test hypotheses effectively, determine treatment effects efficiently, and make sound conclusions. R. Hensberry, D. Marx, S. Kachman, D. Travnicek, Simulation Study of Spatial Poisson Data Assessing the Inclusion of Spatial Correlation and Non-normality in the Analysis, Conference on Applied Statistics in Agriculture, 2001. Grad students in agricultural disciplines. Research continued on the use of multivariate statistical methods for the analysis of range vegetation, the CREWS, P., WENDELIN, R., KACHMAN, S. D., 1995. Hillman, 2009. Eng. The Statistical Analysis System (SAS) and SAS GRAPH is widely used for data analysis. The statistical properties of two measures Optimal Design of Mixed-Effects PK/PD Models Based on Differential Equations. 2010. Computer simulation work is underway to investigate the power of different test procedures for analyzing rating data in agronomy experiments when the assumptions of normality and independence are not satisfied. 2011. Differential immunity in pigs with high and low responses to porcine reproductive and respiratory syndrome virus infection. Serba, D.S., O. Gulsen, B.G. A. Smith, and S. D. Kachman. crop genotypes selection. Ø Inferential statistics is the application of statistical theories to analyze the research problems. Schmidt, J. J., Blankenship, E. E. and Lindquist J. L. (2011) "Corn and Velvetleaf (Abutilon theophrasti ) Transpiration in Response to Drying Soil," Weed Science, 59: 50-54. Spatial Variability - Nearest-neighbor models are used to evaluate experiments with spatial correlation or local treatment-related competition effects. power assessment for generalized linear mixed models) allow more efficient use of increasingly limited resources (e.g. R. Landes, K. Eskridge, S. Baenziger, D. Marx, Are spatial models needed with adequately blocked field trails?, Conference on applied Statistics in Agriculture, 2002. The Statistical Analysis System (SAS) developed at N.C. State University has been implemented on the IBM 360/65 and user-orientation for the use of the system was provided Hoff, L.D. of stable equilibria in evolving populations. West, D. Marx, W. Klaskala, C. Mitchell, C. Wood. botanical composition). As new methods are developed, they are shared with colleagues at other universities, research facilities, and in industry & government. Schwasinger-Schmidt, T. E., S. D. Kachman, and L. G. Harshman. Graduate students in statistics. Statistical Applications in Genetics and Molecular Biology. The distribution of weeds in Nebraska soybean & corn fields is being evaluated. Many are from developing countries, so the impact is world-wide. When data are spatially correlated, the usual chi-squared tests of this hypothesis will be invalid. Brown-Brandl, R.A. Eigenberg, and J.A. Applications focus on portfolio and safety-first models to aid the plant breeder with making selections in the presence of genotype-environment interaction. 13-16 September, Dallas, TX. Amundsen, D.J.Lee, P.S. Statistician-researcher interaction results in more careful & refined approach to research: questions come up that would not have arisen without these conversations. Y.Wang, K.M. When data are spatially correlated, the usual chi-squared tests of this hypothesis will be invalid. The results indicate that interactions measured inconventional analyses of variance are affected in a specific way by certain types of inter-plant competition.Impacts(N/A)Publications, Progress 01/01/69 to 12/30/69OutputsData were analyzed on the IBM 1130 computer and the IBM 360/65. Entomol. Statistical consultants. Published results from the experiments are listed under various Experiment Station projects. A specific application of interest arises in forest entomology. Tan, S. Y., Cayabyab, B. F., Alcantara, E. P., Ibrahim, Y. Research was completed on a study of the effect of heterosis, cytoplasm type, and seed source on seedling cold tolerance in grain sorghum. As parameters change through cycles of selections, what effect does this have on the selection index and how might it be adjusted accordingly? Epub 2011 Nov 7. Estimation of The Proportion of Variation Accounted For By DNA Tests. 3. The Design of Experiments: Statistical Principles for Practical Application, 620 pp. Research is in progress utilizing multivariate techniques to study the inheritance of the fatty acid constituents of soybean oil and the botanical composition of range vegetation.Impacts(N/A)Publications, Progress 01/01/79 to 12/30/79OutputsAbout 1470 conferences were held with Experiment Station staff members and graduate students to assist in the design, analysis and interpretation of agricultural experiments. The Statistical Analysis System (SAS) and SAS GRAPH is widely used for data analysis. What do you plan to do during the next reporting period to accomplish the goals? 5. The Statistical Analysis System (SAS) developed at N.C. State Univeristy has been implemented on the IBM 370/58 and user-orientation for the use of the system was provided to both staff and students. Quantifying articulatory distinctiveness of vowels, Interspeech, 277-280. Several major computer programs and many routine programs were developed, tested and used to analyze data for individual research projects. Using a nonlinear crossed random effects model with three-way treatment structure for detecting circadian patterns of hormones in heat stressed Holsteins. Structural equation modeling for studying genotype-by-environment interaction of physiological traits affecting yield in wheat. The advent of modern data processing equipment’s has enabled the agricultural land use planners to utilize new techniques and meth­odologies and the demands for still more data. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.ImpactsAs the focus of agricultural research evolves to meet new challenges, the statistical issues (what data to collect, what assumptions are reasonable, how to design, model, analyze & test) continue to be in flux. Distribution of weeds in NE's soybean & corn fields is being evaluated. Weather, climate, air and water quality are included, as are studies of plant and animal populations. Computational Statistics and Data Analysis, 54: 1179-1189. Generalized mixed model techniques have now been developed which bring the various special cases under a larger class models and provides estimators which can be obtained without resorting to first principles. 05-1036. Statistical research and consultation has been done with extension centers over the course of the year with compilation and interpretation of data for their research as well as how to best gather the statistical information needed to further the agricultural research being done at the centers.ImpactsData collected from research and collaboration of grants dealing with farm animals and plant selection was presented in a number of papers, journals, and presentations by faculty from the Statistics department. 2000. Mulla, ed. 2007. Low, J. Kim, M. Zhang, P. L. Oh, D. Nehrenberg, K. J. Hua, S. D. Kachman, E. N. Moriyama, J. Walter, D. A. Peterson, and D. Pomp. data sets using pictures and statistical quantities – see Workshop 3 2. Statistician-researcher interaction results in more careful & refined approach to research: questions come up that would not have arisen without these conversations. 130:3, 459-468. (d). CUOMO, G.J., ANDERSON, B.E., YOUNG, L.J., WILHEIM, W. W., 1996. The extracted lines are currently being crossed to testers to evaluate their performance.Multivariate statistical techniques is an area under study where discriminant analysis is used as an aid in the exploration of differences between groups. Epub 2012 May 25. Jones, and G.E. London: Chapman & Hall. 2. 5. Preparation and functional properties of starch-based packaging foams as affected by ingredients and speed using a supersaturated split-plot design. A model has been developed using chaos theory to help explain animal response to heat stress. The advent of increased computing power facilitates the development of these tools. Data collected from these experiments were processed on the IBM 1130 computer in the Statistical Laboratory and the IBM 360/65 in theComputing Center. Not only are some environments more favorable, but the amount of variability is needed. Academia.edu is a platform for academics to share research papers. Gower, J.M. 819-833. Ø Inferential statistics is the application of statistical theories to analyze the research problems. However, if you haven’t gotten to that point yet, here’s some information on statistics in the business field. extensive data on the research, teaching, and extension personnel in the Colleges of Agriculture and Home Economics. Journal of Food Quality 22:363-373. Statistician-researcher interaction results in more careful & refined approach to research: questions come up that would not have arisen without these conversations. 2010. Analysis of multiple-environment trials using the probability of outperforming a check. Workshops on spatial statistics, generalized mixed models (including using new SAS Proc GLIMMIX in agricultural research), and statistical genomics have been presented to agriculturally-oriented user groups on UNL campus, at Nebraska regional research centers, and nationally by invitation.ImpactsCollaboration has resulted in numerous publications in refereed journals and has stimulated new grant proposals, many of which have been funded. PMID: 22630137. Abeyo, K.L. The results were published by these Experiment Station workers and are listed under their projects. Journal of the American Mosquito. Insect Mol Biol, School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska, USA., 2009, Vol. The Survey on agricultural production methods (SAPM) was a one off survey in 2010 to collect farm level data on agri-environmental measures to support monitoring of the relevant European Union policies (e.g. 2009. 3. Statistics is very important when it comes to the conclusion of research. Staff at out-state research centers utilize SAS through terminals and modem-connected microcomputers. Work remains to be done in examining the ability of the estimation procedure to quantify spacing accuracy.Impacts(N/A)Publications, Progress 01/01/89 to 12/30/89OutputsThere are several criteria used by farmers when evaluating new crop varieties,including grain yield, the ability to stand up until harvested, rate of grain dry down, and others. PMID: 22634760. Annals of Human Genetics. Plos One 7: e39191. Englem) Half-sib Populations. 2005. 3. Documentation for programs on optimum plot size and variances, standard deviations, and coefficients of variation were developed andmade available to users as Statistical Laboratory Reports 4 and 5. Therefore the teaching of Information Technology at agriculture-based university should exploit the close relationship with mathematics, statistics and biology. 2009. Journal of Infectious Diseases. The analysis of spatially correlated count data will provide a more efficient way to determine treat differences and their significance levels.Publications, Progress 10/01/98 to 09/30/99OutputsThe investigators have worked on new methods of analyzing experimental data and designing experiments in the fields of agriculture and natural resources. Yan P, Clayton MK, 2006. When results of laboratories or methods are compared where more than one factor can be of influence and must be distinguished from random effects, then ANOVA is a powerful statistical tool to be used. The models were shown to be very reliable in predicting the response of varietal blends of soybeans. 2.) Research continued on variance component estimation in genetic research, the application of repeated measures theory and techniques to animal experiments, and the development of efficient sampling techniques for studying Yang, F., A. M. Parkhurst, T.M. Agriculture and Home Economics received extensive use. 2010. Several major computer programs and many routine programs were developed, tested and used to analyze data for individual research projects. The results are published by these Experiment Station workers and are listed under their projects. A specific application of interest arises in … B. Yu, R. Perrin, D. Marx. Changes in fractal dimensions have been used to signal heat stress in steers. Ecological Applications. Klocke, N. L., D. G. Watts, J.P.Schneekloth, D.R.Davison, R. W. Todd, and A. M. Parkhurst. Work is proceeding on formulating risk efficient crop models for the particular perspective of the decision maker extending these models to multiple-trait selection. Testing fuel efficiency of a tractor with a continuously variable transmission. Journal of Phytopathology 144:533-541. Changing the Support of a Spatial Covariate: A Simulation Study. Impact factor: 10.224. statistical methods for the analysis of changes in botanical composition of range vegetation and the use of SAS to analyze experiments conducted over time with multivariate responses and autocorrelated errors. A., A. Montesinos-Lopez Abelardo, J. Crossa, K. M. Eskridge, R. A. Saenz. Research in agr. Kocher, M. F., J. M. Coleman, J. 18(4), pp. Model for understanding thermal hysteresis during heat stress: A matter of direction. Industrial Crops and Products. 20:389-400. Journal of Biopharmaceutical Statistics. Hooks, T., J. F. Pedersen, D. B. Marx, and R, E. Gaussoin 2007. Classical statistical theory is based on probability models. Changes in soil microbial community structure with tillage under long-term wheat-fallow management, Soil Biology and Biochemistry, Estimating the probability that a genomic library contains a specific DNA sequence. Approximately 1400 data processing jobs were handled during the year.Many computer programs to perform specific tasks were developed, tested, and used to analyze data for individual research projects. We have developed methods based on a multinomial autologistic model. Analysis of bird repellent experiments in the presence of treatment interference. 1. Using statistics, you can plan the production according to what the customer likes and wants, and you can check the quality of the products far more efficiently with statistical methods. Several major computer programs and many routine programs were developed, tested and used to analyze data for individual research projects. This will allow a more efficient allocation of replicataed trials in the future.Publications, Progress 10/01/01 to 09/30/02OutputsDesigns and analyses of unreplicated field designs were studied. When data are spatially correlated, the usual chi-squared tests of this hypothesis will be invalid. Physiological responses of tom turkey's to temperature and humidity change with age. A., Blankenship, E. E., Martin, A. R. and Roeth, F. W. (2011) "Joint Action Analysis Utilizing Concentration Addition and Independent Action Models," Weed Technology, 25: 436-446. Crop Science. 145:133-146. The distribution of weeds in Nebraska soybean and corn fields is being evaluated. These are the next generation of statisticians who will work with agricultural researchers. Schreiber, Hallmon, D.F., Eskridge, K.M., Marten, G.G. PARTICIPANTS: Participants in Department of Statistics, UNL: Erin Blankenship, Professor of Statistics; Kent Eskridge, Professor of Statistics; Steve Kachman, Professor of Statistics and Interim Chair; Steve Ladunga, Professor of Statistics, David Marx, Professor of Statistics; Anne Parkhurst, Professor of Statistics; Walt Stroup, Professor of Statistics; Dong Wang, Associate Professor of Statistics TARGET AUDIENCES: 1. In the animal science field, when comparing animals across environments, it is important to adjust for differences between environments. When questions of interpretation of statistical results arise, we help sort though what can & cannot be said legitimately. Research was conducted on linear models to describe the competitive interactions among genotypes that occur in populations of plant species. DOI identifier: 10.12681/eadd/11515. We found that best linear unbiased predictors (BLUP's) were very useful indetermining which lines were superior in an unreplicated field experiment. C. A. Prohaska, AnastasiosI. Parkhurst, A.M. 2010. Eskridge, K. Stanek-Krogstrand, P. Ritter-Gooder. Data collected for these experiments were processed on the IBM System 34 Computer in the Biometrics Center and the IBM 370/58 in the Computing Center. 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