The (ir)relevance of the crop yield gap concept to food security in developing countries: with an application of multi agent modeling to farming systems in Uganda
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis Book |
| Language: | English |
| Published: |
Göttingen
Cuvillier
2006
|
| Edition: | 1. Aufl. |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Physical Description: | XV, 207 S. graph. Darst., Kt. |
| ISBN: | 9783865379108 3865379109 |
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| adam_text | THE (IR)RELEVANCE OF THE CROP YIELD GAP CONCEPT TO FOOD SECURITY IN
DEVELOPING COUNTRIES WITH AN APPLICATION OF MULTI AGENT MODELING TO
FARMING SYSTEMS IN UGANDA TABLE OF CONTENTS (BRIEF) SUMMARY IX
ACKNOWLEDGEMENTS ....XIII ABBREVIATIONS XV 1 INTRODUCTION 1 2 THE
(IR)RELEVANCE OF CROP YIELD GAPS IN DEVELOPING COUNTRIES 10 3 CONCEPTUAL
FRAME AND ANALYTICAL APPROACH 30 4 GENERAL METHODOLOGY 40 5 GENERATION
OF LANDSCAPES AND AGENT POPULATIONS 53 6 CROP YIELD AND SOIL PROPERTY
DYNAMICS 72 7 PRODUCTION BEHAVIOR 90 8 CONSUMPTION BEHAVIOR 118 9
SIMULATION RESULTS 138 10 DISCUSSION 158 REFERENCES 164 APPENDIX 184
TABLE OF AUTHORITIES 204 TABLE OF CONTENTS (DETAILED) SUMMARY IX
ACKNOWLEDGEMENTS XIII ABBREVIATIONS XV 1 INTRODUCTION 1 1.1 INTRODUCTION
1 1.2 PROBLEM BACKGROUND 1 1.2.1 THE CROP YIELD GAP AND FOOD SECURITY 1
1.2.2 THE CROP YIELD POTENTIAL 2 1.2.3 NEED FOR INTEGRATED APPROACHES 4
1.3 OBJECTIVES 7 1.4 APPROACH 7 1.4.1 MAIN METHODOLOGICAL CONTRIBUTIONS
7 1.4.2 MAIN COLLABORATIONS 8 1.5 OUTLINE OF THE THESIS 9 2 THE
(IR)RELEVANCE OF CROP YIELD GAPS IN DEVELOPING COUNTRIES 10 2.1
INTRODUCTION 10 2.2 THE CROP YIELD GAP 10 2.2.1 THE YIELD GAP CONCEPT 10
2.2.2 BACKGROUND 12 2.2.3 THE YIELD GAP DEBATE 12 2.3 MISCONCEPTIONS
ABOUT CROP YIELD GAPS 14 2.3.1 FARMERS WANT A HIGHER YIELD POTENTIAL .
14 2.3.2 A HIGHER YIELD POTENTIAL IS NEEDED TO MEET FUTURE DEMANDS 16
2.3.3 A HIGHER YIELD POTENTIAL INCREASES FOOD SECURITY 18 2.3.4 A
HIGHER YIELD POTENTIAL IS NEEDED TO KEEP PRICES LOW 21 2.4 MORE THAN
GENES 22 2.4.1 THE IMPORTANCE OF CREATING AN ENABLING ENVIRONMENT 22
2.4.2 THE LIMITED RELEVANCE OF NATIONAL AVERAGE YIELDS 24 2.5 SUMMARY 29
3 CONCEPTUAL FRAME AND ANALYTICAL APPROACH 30 3.1 INTRODUCTION 30 3.2
DECOMPOSING CROP YIELD GAPS 31 3.2.1 PROXIMATE FACTORS 31 3.2.2
UNDERLYING FACTORS 32 3.3 SOCIOECONOMIC DIMENSIONS OF THE YIELD GAP 34
3.3.1 PRIVATE OBJECTIVES 34 3.3.2 SOCIAL OBJECTIVES 36 3.4 APPLICATION
TO UGANDA 37 3.4.1 SOUTHEAST UGANDA 37 3.4.2 MAIZE IN UGANDA 38 3.5
SUMMARY 39 4 GENERAL METHODOLOGY 40 4.1 INTRODUCTION 40 4.2
METHODOLOGICAL APPROACH 40 4.2.1 HETEROGENEITY 40 4.2.2 MATHEMATICAL
PROGRAMMING-BASED MULTI-AGENT SYSTEMS (MP-MAS)...41 4.3 INTRODUCTION OF
SYSTEM COMPONENTS 42 4.3.1 FARM AGENTS 42 4.3.2 LANDSCAPE 43 4.3.3
BIOPHYSICS 43 4.4 HETEROGENEITY, INTERACTION, AND DYNAMICS 43 4.4.1
HETEROGENEITY 44 4.4.2 INTERACTION 44 4.4.3 DYNAMICS 45 4.5 MIXED
INTEGER LINEAR PROGRAMMING (MILP) 46 4.5.1 NON-SEPARABLE FARM
DECISION-MAKING 46 4.5.2 CONCISE THEORETICAL MODEL 47 4.6 A THREE-STAGE
NON-SEPARABLE DECISION PROCESS 48 4.6.1 INVESTMENTS 49 4.6.2 PRODUCTION
50 4.6.3 CONSUMPTION 50 4.7 SOFTWARE IMPLEMENTATION 51 4.8 SUMMARY 51 5
GENERATION OF LANDSCAPES AND AGENT POPULATIONS 53 5.1 INTRODUCTION 53
5.2 THE LANDSCAPE 53 5.2.1 DATA SOURCES 54 5.2.2 THE VILLAGES OF MAGADA
AND BUYEMBA 54 5.2.3 LANDSCAPE REPRESENTATION 56 5.2.4 LOCATION OF
AGENTS AND FARM PLOTS (LAYERS 1-3) 57 5.2.5 THE SOCIOECONOMIC LANDSCAPE
(LAYERS 4-5) 59 5.2.6 SOIL CHEMICAL PROPERTIES (LAYERS 6-10) 60 5.2.7
SOIL PHYSICAL PROPERTIES (LAYERS 11-12) 61 5.3 THE AGENTS 62 5.3.1 DATA
SOURCES 62 5.3.2 GENERATING AN AGENT POPULATION 62 5.3.3 RANDOM DATA
GENERATION 63 5.3.4 CONSISTENCY CHECKS 65 5.4 VALIDATION OF RESULTS 66
5.4.1 POPULATION LEVEL 67 5.4.2 CLUSTER LEVEL 68 5.4.3 AGENT LEVEL 69
5.5 SUMMARY 71 6 CROP YIELD AND SOIL PROPERTY DYNAMICS 72 6.1
INTRODUCTION 72 6.2 BACKGROUND 72 6.2.1 PROBLEM BACKGROUND 72 6.2.2
THEORETICAL BACKGROUND 73 6.2.3 THE TROPICAL SOIL PRODUCTIVITY
CALCULATOR (TSPC) 74 6.3 FOUR PHASES IN SOIL PROPERTY DYNAMICS 75 6.3.1
PHASE 1: YIELD DETERMINANTS 75 6.3.2 PHASE 2: CROP YIELD 79 6.3.3 PHASE
3: SOIL PROPERTY UPDATING 80 6.3.4 PHASE 4: SOIL PROPERTY BALANCES 83
6.4 MODEL CALIBRATION 84 6.4.1 CROPS INCLUDED 84 6.4.2 CROP PHYSICAL
CHARACTERISTICS 84 6.4.3 CROP CHEMICAL CHARACTERISTICS 86 6.4.4 CROP
YIELD RESPONSE FUNCTIONS 86 6.5 VALIDATION OF RESULTS 88 6.6 SUMMARY 89
7 PRODUCTION BEHAVIOR 90 7.1 INTRODUCTION 90 7.2 CROP YIELD RESPONSE TO
LABOR USE 90 7.2.1 FRONTIER PRODUCTION FUNCTION 90 7.2.2 PRODUCTION DATA
USED 92 7.2.3 MODEL ESTIMATES 92 7.2.4 LABOR RESPONSE FACTOR 93 7.3 THE
DIFFUSION OF INNOVATIONS 94 7.3.1 THEORETICAL BACKGROUND 94 7.3.2
EMPIRICAL APPLICATION 95 7.4 AGENT YIELD EXPECTATIONS 96 7.4.1
THEORETICAL BACKGROUND 96 7.4.2 EMPIRICAL APPLICATION 97 7.5 PRODUCTION
OF LIVESTOCK, COFFEE, VEGETABLES AND FRUITS 99 7.5.1 LIVESTOCK
PRODUCTION 99 7.5.2 COFFEE PRODUCTION 101 7.5.3 FRUIT AND VEGETABLE
PRODUCTION 102 7.6 FURTHER CONSTRAINTS AND INCENTIVES TO PRODUCTION 103
7.6.1 LABOR AVAILABILITY 103 7.6.2 LABOR TIME ALLOCATION 105 7.6.3 LABOR
ALLOCATION BY GENDER 106 7.6.4 ROTATIONAL CONSTRAINTS 107 7.6.5
INTERCROPPING 108 7.6.6 CROP PESTS AND DISEASES : ILL 7.6.7 RISK 112
7.6.8 INPUT PRICES 112 7.7 VALIDATION OF RESULTS 113 7.8 SUMMARY 117 8
CONSUMPTION BEHAVIOR 118 8.1 INTRODUCTION 118 8.2 A THREE-STEP BUDGETING
PROCESS 118 8.2.1 THEORETICAL BACKGROUND 118 8.2.2 THEORETICAL MODEL 119
8.2.3 SAVINGS AND EXPENDITURES (STEP 1) 121 8.2.4 FOOD AND NON-FOOD
EXPENDITURES (STEP 2) 121 8.2.5 ALMOST IDEAL DEMAND SYSTEM (STEP 3) 122
8.2.6 QUANTIFYING POVERTY FROM FOOD ENERGY NEEDS AND INTAKE LEVELS 124
8.2.7 COPING STRATEGIES TO FOOD INSECURITY 125 8.2.8 FERTILITY AND
MORTALITY 126 8.3 DATA AND ESTIMATION 127 8.3.1 BUDGET DATA USED 127
8.3.2 SAVINGS AND EXPENDITURES (STEP 1) 127 8.3.3 FOOD AND NON-FOOD
EXPENDITURES (STEP 2) 128 8.3.4 ALMOST IDEAL DEMAND SYSTEM (STEP 3) 128
8.3.5 MARKET PRICES 129 8.3.6 FOOD ENERGY NEEDS AND INTAKE LEVELS 130
8.3.7 OPPORTUNITY COST OF FARM LABOR AND MIGRATION 132 8.3.8 POPULATION
GROWTH AND HIV/AIDS 133 8.4 VALIDATION OF RESULTS 134 8.5 SUMMARY 137 9
SIMULATION RESULTS 138 9.1 INTRODUCTION 138 9.2 THE BASELINE SCENARIO...
138 9.2.1 DEFINING THE BASELINE SCENARIO 138 9.2.2 SENSITIVITY OF THE
BASELINE TO INITIAL CONDITIONS 138 9.2.3 BASELINE DYNAMICS: SOIL
FERTILITY DECLINE AND POPULATION GROWTH 140 9.3 THE MAIZE YIELD GAP 143
9.3.1 DECOMPOSITION IN PROXIMATE FACTORS 143 9.3.2 THE MAIZE YIELD GAP
AND FARM PERFORMANCE 144 9.3.3 THE MAIZE YIELD GAP VS. ECONOMIC
WELL-BEING AND FOOD SECURITY 146 9.3.4 MAIZE YIELD GAP DYNAMICS 148
9.3.5 DECOMPOSITION IN UNDERLYING FACTORS 152 9.4 THE IMPACT OF CROP
BREEDING 154 9.5 THE EFFECT OF HIV/AIDS 156 9.6 SUMMARY 157 10
DISCUSSION 158 10.1 INTRODUCTION 158 10.2 LIMITATIONS OF THE STUDY 158
10.2.1 LOW DATA QUALITY 158 10.2.2 MIGRATION 158 10.2.3 SOURCES OF
HETEROGENEITY 159 10.2.4 UNKNOWN CROP YIELD RESPONSE FUNCTIONS 159
10.2.5 ABSENCE OF LOCAL FACTOR AND OUTPUT MARKETS 159 10.3 AN EX-POST
COMPARISON OF APPROACHES 159 10.4 RECOMMENDATIONS FOR RESEARCH 162
REFERENCES 164 APPENDIX 184 TABLE OF AUTHORITIES 204 VII
|
| adam_txt |
THE (IR)RELEVANCE OF THE CROP YIELD GAP CONCEPT TO FOOD SECURITY IN
DEVELOPING COUNTRIES WITH AN APPLICATION OF MULTI AGENT MODELING TO
FARMING SYSTEMS IN UGANDA TABLE OF CONTENTS (BRIEF) SUMMARY IX
ACKNOWLEDGEMENTS .XIII ABBREVIATIONS XV 1 INTRODUCTION 1 2 THE
(IR)RELEVANCE OF CROP YIELD GAPS IN DEVELOPING COUNTRIES 10 3 CONCEPTUAL
FRAME AND ANALYTICAL APPROACH 30 4 GENERAL METHODOLOGY 40 5 GENERATION
OF LANDSCAPES AND AGENT POPULATIONS 53 6 CROP YIELD AND SOIL PROPERTY
DYNAMICS 72 7 PRODUCTION BEHAVIOR 90 8 CONSUMPTION BEHAVIOR 118 9
SIMULATION RESULTS 138 10 DISCUSSION 158 REFERENCES 164 APPENDIX 184
TABLE OF AUTHORITIES 204 TABLE OF CONTENTS (DETAILED) SUMMARY IX
ACKNOWLEDGEMENTS XIII ABBREVIATIONS XV 1 INTRODUCTION 1 1.1 INTRODUCTION
1 1.2 PROBLEM BACKGROUND 1 1.2.1 THE CROP YIELD GAP AND FOOD SECURITY 1
1.2.2 THE CROP YIELD POTENTIAL 2 1.2.3 NEED FOR INTEGRATED APPROACHES 4
1.3 OBJECTIVES 7 1.4 APPROACH 7 1.4.1 MAIN METHODOLOGICAL CONTRIBUTIONS
7 1.4.2 MAIN COLLABORATIONS 8 1.5 OUTLINE OF THE THESIS 9 2 THE
(IR)RELEVANCE OF CROP YIELD GAPS IN DEVELOPING COUNTRIES 10 2.1
INTRODUCTION 10 2.2 THE CROP YIELD GAP 10 2.2.1 THE YIELD GAP CONCEPT 10
2.2.2 BACKGROUND 12 2.2.3 THE YIELD GAP DEBATE 12 2.3 MISCONCEPTIONS
ABOUT CROP YIELD GAPS 14 2.3.1 'FARMERS WANT A HIGHER YIELD POTENTIAL'.
14 2.3.2 'A HIGHER YIELD POTENTIAL IS NEEDED TO MEET FUTURE DEMANDS' 16
2.3.3 'A HIGHER YIELD POTENTIAL INCREASES FOOD SECURITY' 18 2.3.4 'A
HIGHER YIELD POTENTIAL IS NEEDED TO KEEP PRICES LOW' 21 2.4 MORE THAN
GENES 22 2.4.1 THE IMPORTANCE OF CREATING AN ENABLING ENVIRONMENT 22
2.4.2 THE LIMITED RELEVANCE OF NATIONAL AVERAGE YIELDS 24 2.5 SUMMARY 29
3 CONCEPTUAL FRAME AND ANALYTICAL APPROACH 30 3.1 INTRODUCTION 30 3.2
DECOMPOSING CROP YIELD GAPS 31 3.2.1 PROXIMATE FACTORS 31 3.2.2
UNDERLYING FACTORS 32 3.3 SOCIOECONOMIC DIMENSIONS OF THE YIELD GAP 34
3.3.1 PRIVATE OBJECTIVES 34 3.3.2 SOCIAL OBJECTIVES 36 3.4 APPLICATION
TO UGANDA 37 3.4.1 SOUTHEAST UGANDA 37 3.4.2 MAIZE IN UGANDA 38 3.5
SUMMARY 39 4 GENERAL METHODOLOGY 40 4.1 INTRODUCTION 40 4.2
METHODOLOGICAL APPROACH 40 4.2.1 HETEROGENEITY 40 4.2.2 MATHEMATICAL
PROGRAMMING-BASED MULTI-AGENT SYSTEMS (MP-MAS).41 4.3 INTRODUCTION OF
SYSTEM COMPONENTS 42 4.3.1 FARM AGENTS 42 4.3.2 LANDSCAPE 43 4.3.3
BIOPHYSICS 43 4.4 HETEROGENEITY, INTERACTION, AND DYNAMICS 43 4.4.1
HETEROGENEITY 44 4.4.2 INTERACTION 44 4.4.3 DYNAMICS 45 4.5 MIXED
INTEGER LINEAR PROGRAMMING (MILP) 46 4.5.1 NON-SEPARABLE FARM
DECISION-MAKING 46 4.5.2 CONCISE THEORETICAL MODEL 47 4.6 A THREE-STAGE
NON-SEPARABLE DECISION PROCESS 48 4.6.1 INVESTMENTS 49 4.6.2 PRODUCTION
50 4.6.3 CONSUMPTION 50 4.7 SOFTWARE IMPLEMENTATION 51 4.8 SUMMARY 51 5
GENERATION OF LANDSCAPES AND AGENT POPULATIONS 53 5.1 INTRODUCTION 53
5.2 THE LANDSCAPE 53 5.2.1 DATA SOURCES 54 5.2.2 THE VILLAGES OF MAGADA
AND BUYEMBA 54 5.2.3 LANDSCAPE REPRESENTATION 56 5.2.4 LOCATION OF
AGENTS AND FARM PLOTS (LAYERS 1-3) 57 5.2.5 THE SOCIOECONOMIC LANDSCAPE
(LAYERS 4-5) 59 5.2.6 SOIL CHEMICAL PROPERTIES (LAYERS 6-10) 60 5.2.7
SOIL PHYSICAL PROPERTIES (LAYERS 11-12) 61 5.3 THE AGENTS 62 5.3.1 DATA
SOURCES 62 5.3.2 GENERATING AN AGENT POPULATION 62 5.3.3 RANDOM DATA
GENERATION 63 5.3.4 CONSISTENCY CHECKS 65 5.4 VALIDATION OF RESULTS 66
5.4.1 POPULATION LEVEL 67 5.4.2 CLUSTER LEVEL 68 5.4.3 AGENT LEVEL 69
5.5 SUMMARY 71 6 CROP YIELD AND SOIL PROPERTY DYNAMICS 72 6.1
INTRODUCTION 72 6.2 BACKGROUND 72 6.2.1 PROBLEM BACKGROUND 72 6.2.2
THEORETICAL BACKGROUND 73 6.2.3 THE TROPICAL SOIL PRODUCTIVITY
CALCULATOR (TSPC) 74 6.3 FOUR PHASES IN SOIL PROPERTY DYNAMICS 75 6.3.1
PHASE 1: YIELD DETERMINANTS 75 6.3.2 PHASE 2: CROP YIELD 79 6.3.3 PHASE
3: SOIL PROPERTY UPDATING 80 6.3.4 PHASE 4: SOIL PROPERTY BALANCES 83
6.4 MODEL CALIBRATION 84 6.4.1 CROPS INCLUDED 84 6.4.2 CROP PHYSICAL
CHARACTERISTICS 84 6.4.3 CROP CHEMICAL CHARACTERISTICS 86 6.4.4 CROP
YIELD RESPONSE FUNCTIONS 86 6.5 VALIDATION OF RESULTS 88 6.6 SUMMARY 89
7 PRODUCTION BEHAVIOR 90 7.1 INTRODUCTION 90 7.2 CROP YIELD RESPONSE TO
LABOR USE 90 7.2.1 FRONTIER PRODUCTION FUNCTION 90 7.2.2 PRODUCTION DATA
USED 92 7.2.3 MODEL ESTIMATES 92 7.2.4 LABOR RESPONSE FACTOR 93 7.3 THE
DIFFUSION OF INNOVATIONS 94 7.3.1 THEORETICAL BACKGROUND 94 7.3.2
EMPIRICAL APPLICATION 95 7.4 AGENT YIELD EXPECTATIONS 96 7.4.1
THEORETICAL BACKGROUND 96 7.4.2 EMPIRICAL APPLICATION 97 7.5 PRODUCTION
OF LIVESTOCK, COFFEE, VEGETABLES AND FRUITS 99 7.5.1 LIVESTOCK
PRODUCTION 99 7.5.2 COFFEE PRODUCTION 101 7.5.3 FRUIT AND VEGETABLE
PRODUCTION 102 7.6 FURTHER CONSTRAINTS AND INCENTIVES TO PRODUCTION 103
7.6.1 LABOR AVAILABILITY 103 7.6.2 LABOR TIME ALLOCATION 105 7.6.3 LABOR
ALLOCATION BY GENDER 106 7.6.4 ROTATIONAL CONSTRAINTS 107 7.6.5
INTERCROPPING 108 7.6.6 CROP PESTS AND DISEASES : ILL 7.6.7 RISK 112
7.6.8 INPUT PRICES 112 7.7 VALIDATION OF RESULTS 113 7.8 SUMMARY 117 8
CONSUMPTION BEHAVIOR 118 8.1 INTRODUCTION 118 8.2 A THREE-STEP BUDGETING
PROCESS 118 8.2.1 THEORETICAL BACKGROUND 118 8.2.2 THEORETICAL MODEL 119
8.2.3 SAVINGS AND EXPENDITURES (STEP 1) 121 8.2.4 FOOD AND NON-FOOD
EXPENDITURES (STEP 2) 121 8.2.5 ALMOST IDEAL DEMAND SYSTEM (STEP 3) 122
8.2.6 QUANTIFYING POVERTY FROM FOOD ENERGY NEEDS AND INTAKE LEVELS 124
8.2.7 COPING STRATEGIES TO FOOD INSECURITY 125 8.2.8 FERTILITY AND
MORTALITY 126 8.3 DATA AND ESTIMATION 127 8.3.1 BUDGET DATA USED 127
8.3.2 SAVINGS AND EXPENDITURES (STEP 1) 127 8.3.3 FOOD AND NON-FOOD
EXPENDITURES (STEP 2) 128 8.3.4 ALMOST IDEAL DEMAND SYSTEM (STEP 3) 128
8.3.5 MARKET PRICES 129 8.3.6 FOOD ENERGY NEEDS AND INTAKE LEVELS 130
8.3.7 OPPORTUNITY COST OF FARM LABOR AND MIGRATION 132 8.3.8 POPULATION
GROWTH AND HIV/AIDS 133 8.4 VALIDATION OF RESULTS 134 8.5 SUMMARY 137 9
SIMULATION RESULTS 138 9.1 INTRODUCTION 138 9.2 THE BASELINE SCENARIO.
138 9.2.1 DEFINING THE BASELINE SCENARIO 138 9.2.2 SENSITIVITY OF THE
BASELINE TO INITIAL CONDITIONS 138 9.2.3 BASELINE DYNAMICS: SOIL
FERTILITY DECLINE AND POPULATION GROWTH 140 9.3 THE MAIZE YIELD GAP 143
9.3.1 DECOMPOSITION IN PROXIMATE FACTORS 143 9.3.2 THE MAIZE YIELD GAP
AND FARM PERFORMANCE 144 9.3.3 THE MAIZE YIELD GAP VS. ECONOMIC
WELL-BEING AND FOOD SECURITY 146 9.3.4 MAIZE YIELD GAP DYNAMICS 148
9.3.5 DECOMPOSITION IN UNDERLYING FACTORS 152 9.4 THE IMPACT OF CROP
BREEDING 154 9.5 THE EFFECT OF HIV/AIDS 156 9.6 SUMMARY 157 10
DISCUSSION 158 10.1 INTRODUCTION 158 10.2 LIMITATIONS OF THE STUDY 158
10.2.1 LOW DATA QUALITY 158 10.2.2 MIGRATION 158 10.2.3 SOURCES OF
HETEROGENEITY 159 10.2.4 UNKNOWN CROP YIELD RESPONSE FUNCTIONS 159
10.2.5 ABSENCE OF LOCAL FACTOR AND OUTPUT MARKETS 159 10.3 AN EX-POST
COMPARISON OF APPROACHES 159 10.4 RECOMMENDATIONS FOR RESEARCH 162
REFERENCES 164 APPENDIX 184 TABLE OF AUTHORITIES 204 VII |
| any_adam_object | 1 |
| any_adam_object_boolean | 1 |
| author | Schreinemachers, Pepijn 1976- |
| author_GND | (DE-588)131784692 |
| author_facet | Schreinemachers, Pepijn 1976- |
| author_role | aut |
| author_sort | Schreinemachers, Pepijn 1976- |
| author_variant | p s ps |
| building | Verbundindex |
| bvnumber | BV022660035 |
| ctrlnum | (OCoLC)180928439 (DE-599)DNB980220114 |
| dewey-full | 338.191724 |
| dewey-hundreds | 300 - Social sciences |
| dewey-ones | 338 - Production |
| dewey-raw | 338.191724 |
| dewey-search | 338.191724 |
| dewey-sort | 3338.191724 |
| dewey-tens | 330 - Economics |
| discipline | Wirtschaftswissenschaften |
| discipline_str_mv | Wirtschaftswissenschaften |
| edition | 1. Aufl. |
| format | Thesis Book |
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| genre | (DE-588)4113937-9 Hochschulschrift gnd-content |
| genre_facet | Hochschulschrift |
| geographic | Uganda Süd (DE-588)4798985-3 gnd |
| geographic_facet | Uganda Süd |
| id | DE-604.BV022660035 |
| illustrated | Illustrated |
| index_date | 2024-07-02T18:24:51Z |
| indexdate | 2024-07-09T21:02:48Z |
| institution | BVB |
| isbn | 9783865379108 3865379109 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-015865906 |
| oclc_num | 180928439 |
| open_access_boolean | |
| owner | DE-703 |
| owner_facet | DE-703 |
| physical | XV, 207 S. graph. Darst., Kt. |
| publishDate | 2006 |
| publishDateSearch | 2006 |
| publishDateSort | 2006 |
| publisher | Cuvillier |
| record_format | marc |
| spelling | Schreinemachers, Pepijn 1976- Verfasser (DE-588)131784692 aut The (ir)relevance of the crop yield gap concept to food security in developing countries with an application of multi agent modeling to farming systems in Uganda [Pepijn Schreinemachers] 1. Aufl. Göttingen Cuvillier 2006 XV, 207 S. graph. Darst., Kt. txt rdacontent n rdamedia nc rdacarrier Zugl.: Bonn, Univ., Diss., 2006 Ernährungssicherung (DE-588)4152826-8 gnd rswk-swf Landwirtschaftlicher Familienbetrieb (DE-588)4120651-4 gnd rswk-swf Ernteertrag (DE-588)4015358-7 gnd rswk-swf Uganda Süd (DE-588)4798985-3 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Uganda Süd (DE-588)4798985-3 g Landwirtschaftlicher Familienbetrieb (DE-588)4120651-4 s Ernteertrag (DE-588)4015358-7 s Ernährungssicherung (DE-588)4152826-8 s DE-604 GBV Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=015865906&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Schreinemachers, Pepijn 1976- The (ir)relevance of the crop yield gap concept to food security in developing countries with an application of multi agent modeling to farming systems in Uganda Ernährungssicherung (DE-588)4152826-8 gnd Landwirtschaftlicher Familienbetrieb (DE-588)4120651-4 gnd Ernteertrag (DE-588)4015358-7 gnd |
| subject_GND | (DE-588)4152826-8 (DE-588)4120651-4 (DE-588)4015358-7 (DE-588)4798985-3 (DE-588)4113937-9 |
| title | The (ir)relevance of the crop yield gap concept to food security in developing countries with an application of multi agent modeling to farming systems in Uganda |
| title_auth | The (ir)relevance of the crop yield gap concept to food security in developing countries with an application of multi agent modeling to farming systems in Uganda |
| title_exact_search | The (ir)relevance of the crop yield gap concept to food security in developing countries with an application of multi agent modeling to farming systems in Uganda |
| title_exact_search_txtP | The (ir)relevance of the crop yield gap concept to food security in developing countries with an application of multi agent modeling to farming systems in Uganda |
| title_full | The (ir)relevance of the crop yield gap concept to food security in developing countries with an application of multi agent modeling to farming systems in Uganda [Pepijn Schreinemachers] |
| title_fullStr | The (ir)relevance of the crop yield gap concept to food security in developing countries with an application of multi agent modeling to farming systems in Uganda [Pepijn Schreinemachers] |
| title_full_unstemmed | The (ir)relevance of the crop yield gap concept to food security in developing countries with an application of multi agent modeling to farming systems in Uganda [Pepijn Schreinemachers] |
| title_short | The (ir)relevance of the crop yield gap concept to food security in developing countries |
| title_sort | the ir relevance of the crop yield gap concept to food security in developing countries with an application of multi agent modeling to farming systems in uganda |
| title_sub | with an application of multi agent modeling to farming systems in Uganda |
| topic | Ernährungssicherung (DE-588)4152826-8 gnd Landwirtschaftlicher Familienbetrieb (DE-588)4120651-4 gnd Ernteertrag (DE-588)4015358-7 gnd |
| topic_facet | Ernährungssicherung Landwirtschaftlicher Familienbetrieb Ernteertrag Uganda Süd Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=015865906&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| work_keys_str_mv | AT schreinemacherspepijn theirrelevanceofthecropyieldgapconcepttofoodsecurityindevelopingcountrieswithanapplicationofmultiagentmodelingtofarmingsystemsinuganda |