FREQUENCY AND REGRESSION ANALYSIS
PART II: REGRESSION ANALYSIS This article discusses the role of regression analysis of agricultural data to appreciate how dependent variables, like crop production, vary with different magnitudes of influential factors, like soil salinity or depth of water table. Various techniques of regression analysis are introduced including the regression in segments to detect up to which point a growth factor affects the crop yield and to define the range where there is no influence.

TABLE OF CONTENTS

    6.1 Introduction

  6.5 Regression Analysis

         6.5.1 Introduction
       6.5.2 The Ratio Method
       6.5.3 Regression of y upon x
       6.5.4 Linear Two-way Regression
       6.5.5 Segmented Linear Regression

  6.6 Screening of Time Series

         6.6.1 Time Stability versus Time Trend                                        
       6.6.2 Periodicity of Time Series
       6.6.3 Extrapolation of Time Series
       6.6.4 Missing and Incorrect Data

  6.7 References

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