Contents



Analytical Techniques and Other Calculations viii
Preface ix
Collaborating Farmers xvi

I THE ROLE OF ON-FARM RESEARCH IN TECHNOLOGY
 DEVELOPMENT 1

Description of Farming Systems Research and
 Extension (FSR/E) 2
Purposes of On-Farm Research 5
Types of On-Farm Trials 6
 Exploratory trials 6
 Site-specific trials 6
 Regional trials 7
 Farmer-managed trials 7

 II GENERAL CONSIDERATIONS RELATED TO ON-FARM TRIALS 9

 On-Farm Research Practices 10
 Researcher-farmer relations 10
 Listening to and working with farmers 10
 The nature of the relationship 11
 On-farm experimental procedures 12
 Location on the farm 12
 Experimental designs 13
Field Data Management 14
 Recording 14
 Processing 15
 Unusual values 15
 Standardization of field data 16
 Moisture and area 17
 Maize shelling percentage 18
 Missing plots 19
 Missing plants 21
 Analysis of covariance 22