# Statistical Procedures for Agricultural Research

John Wiley & Sons, Feb 17, 1984 - Technology & Engineering - 704 pages

Here in one easy-to-understand volume are the statistical procedures and techniques the agricultural researcher needs to know in order to design, implement, analyze, and interpret the results of most experiments with crops. Designed specifically for the non-statistician, this valuable guide focuses on the practical problems of the field researcher. Throughout, it emphasizes the use of statistics as a tool of research—one that will help pinpoint research problems and select remedial measures. Whenever possible, mathematical formulations and statistical jargon are avoided. Originally published by the International Rice Research Institute, this widely respected guide has been totally updated and much expanded in this Second Edition. It now features new chapters on the analysis of multi-observation data and experiments conducted over time and space. Also included is a chapter on experiments in farmers' fields, a subject of major concern in developing countries where agricultural research is commonly conducted outside experiment stations. Statistical Procedures for Agricultural Research, Second Edition will prove equally useful to students and professional researchers in all agricultural and biological disciplines. A wealth of examples of actual experiments help readers to choose the statistical method best suited for their needs, and enable even the most complicated procedures to be easily understood and directly applied.
An International Rice Research Institute Book

### Contents

 ELEMENTS OF EXPERIMENTATION 1 SINGLEFACTOR EXPERIMENTS 7 TWOFACTOR EXPERIMENTS 84 THREEORMOREFACTOR EXPERIMENTS 130 COMPARISON BETWEEN TREATMENT MEANS 187 CHAPTER 6 241 PROBLEM DATA 272 ANALYSIS OF DATA FROM A SERIES OF EXPERIMENTS 316
 SOIL HETEROGENEITY 478 COMPETITION EFFECTS 505 MECHANICAL ERRORS 523 SAMPLING IN EXPERIMENTAL PLOTS 532 EXPERIMENTS IN FARMERS FIELDS 562 PRESENTATION OF RESEARCH RESULTS 591 357 424

 INDEX 350 REGRESSION AND CORRELATION ANALYSIS 357 COVARIANCE ANALYSIS 424 CHISQUARE TEST 458
 657 458 Copyright

### About the author (1984)

About the authors KWANCHAI A. GOMEZ is Head of the Department of Statistics at the International Rice Research Institute in the Philippines and an Affiliate Professor of Statistics at the University of the Philippines at Los Ba?os. Dr. Gomez received her PhD in experimental statistics from North Carolina State University. ARTURO A. GOMEZ is a Professor of Agronomy at the University of the Philippines at Los Ba?os and a consultant to the Ministry of Agriculture of the Republic of the Philippines. Dr. Gomez received his PhD in genetics from North Carolina State University.