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Effect of tillage and soil cover on weeds in small holder conservation agricultural system / Otim,Godfrey Anyoni

By: Material type: TextDescription: xviii. 203 pages : illustration ; 30 cmSubject(s):
DDC classification:
  • 23rd. 631.53 OTI
Contents:
Ch 1: Introduction - - 1.0 Introduction - - 1.1 Background of the study - - 1.1.1 Historical and contextual background - - 1.1.2. Small holder farmer - - 1.1.3 Conservation agriculture (ca) and its principles - - 1.1.4. Soil weed seed bank - - 1.1.5 Integrated weed management in conservation agriculture - - 1.2 Statement of the problem - - 1.3 Justification of the study - - 1.4 Objectives of the study - - 1.4.1 Major objective - - 1.4.2 Specific objectives - - 1.5 Research hypothesis - - 1.6 Definition of key terms - - 1.6.1 Conservation agriculture - - 1.6.2 Soil cover - - 1.6.3 Soil seed bank or weed seed bank - - 1.6.4 Minimum tillage (mt) - - 1.6.5 Integrated weed management - - 1.6.6 Ecological weed management - - 1.6.7 Hand weeding - - 1.6.8 Hand hoeing - - 1.6.9 Intercropping - - 1.6.10 Mowing - - 1.6.11 Cutting - - 1.6.12 Dredging and chaining - - 1.7 Conceptual framework - - 1.8. Philosophical under pinning of this research - - Ch 2: Literature review - - 2.0 Introduction - - 2.1 Climate change - - 2.2 Conservation agriculture for sustainability (energy use efficiency and soil health) - - 2.2.1 Relating conservation agriculture with the soil seed bank - - 2.2.2 Crop performance and yield under CA - - 2.2.3 Mechanization of conservation agriculture - - 2.2.4 CA policy and institutional support implications for developing countries - - 2.2.5 Effect of CA on soil health - - 2.2.6. Effect of CA on weeds - - 2.3 Weed ecology - - 2.4 Weed dynamics - - 2.5 Weed management - - 2.5.1 Mechanical and manual weed control - - 2.5.2 Cultural weed control - - 2.5.3 Chemical weed management - - 2.5.4 Preventive weed management - - 2.5.5. Herbicide tolerant crops (HTC) - - 2.5.6 Biological weed control - - 2.6 Integrated weed management in CA - - 2.7. Soil seed banks - - 2.8 Estimation of the soil seed bank - - 2.9.0 Effect of crop management practice on weeds and crop yield - - 2.9.1 Effect of tillage practice on weeds - - 2.9.2 Effect of soil cover on weeds - - 2.9.3 Effect of intercropping on crop yield and performance - - 2.9.4 Yield and weed response to diversified crop rotations - - 2.9.5 Integrated weed management in perspective - - 2.9.6 Conclusion and future prospect of ca for Uganda - - Chapter three: research methodology - - 3.1 objective 1. To compare three seed bank estimation techniques for detecting treatment Differences and determining seed density and species composition - - 3.1.1 Introduction - - 3.1.2 Study site - - 3.1.3 Materials - - 3.1.4 Experimental design and layout - - 3.1.5 Data collection - - 3.1.6 Statistical analysis - - 3.2 Objective 2: to determine the effect of tillage practice on weed density, diversity and Crop performance - - 3.2.1 Materials - - 3.2.2 Methods: experimental design and crop management - - 3.2.3 Data collection - - 3.2.3.1 Weed density - - 3.2.3.2 Weed community - - 3.2.3.3 Leaf area index (lai) and plant height (cm) - - 3.2.3.4 Stand count - - 3.2.3.5 Days to 50% flowering - - 3.2.3.6 plant height - - 3.2.3.7 Pod number - - 3.2.3.8 Pod length - - 3.2.3.9 Disease and pest incidence - - 3.2.3.10 Grain yield - - 3.2.3.11 Rainfall (mm) and daily temperature (OC) - - 3.2.3.12 Data sheet - - 3.2.3.13 Global positioning system receiver (GPS receiver) - - 3.2.14 Statistical analysis - - 3.3 Objective 3: to determine the effect of soil cover on weed density, diversity and crop Performance - - 3.3.1 Materials - - 3.3.2 Methods: experimental design and crop management - - 3.3.3 Data collection - - 3.3.4 Statistical analysis - - 3.4 Objective 4: to determine the effect of the intercrops on overall crop performance in Conservation agricultural systems - - 3.4.1 Materials - - 3.4.2 Methods experimental design and crop management - - 3.4.3 Data collection - - 3.4.4 Data analysis - - 3.5 Ethical consideration - - 3.6 Limitation of the study - - Ch:4 Result Presentations, analysis and discussion of findings - - 4.0 Comparison of three soil seed bank estimation techniques for detecting treatment differences and determining seed density and species composition - - 4.1.1 Introduction - - 4.1.2 Comparison of the three soil seed bank estimation methods to measure soil seed bank weed density - - 4.1.2 Comparison of the three soil seed bank estimation methods to measure weed diversity - - 4.1.3 Effect of tillage and soil cover on soil seed bank - - 4.1.4 Effect of season on soil seed bank density - - 4.1.5 Effect of season on soil seed bank diversity - - 4.1.6 Discussion for the comparison of three soil seed bank estimation techniques for detecting treatment differences and determining soil seed density and diversity - - 4.1.7 Conclusion - - 4.2 Effect of tillage practice on weed density, diversity and crop performance - - 4.2.1 Introduction - - 4.2.2. Effect of rainfall amount and number of rainy days on weed density and diversity - - 4.2.3 Effect of tillage practice on weed density - - 4.2.4 Effect of tillage practice on weed diversity using shannon weiner index - - 4.2.5 Effect of tillage practice on weed diversity using simpsons diversity index - - 4.2.6 Effect of tillage practice on yield - - 4.2.7 Effect of tillage practice x soil cover practice x season interaction on above ground weed density - - 4.2.8 Effect of tillage practice x soil cover practice x season interaction on above ground weed diversity - - 4.2.9 Discussion and conclusion objective 2 - - 4.3 Effect of soil cover practice on weed density, diversity and crop performance - - 4.3.1 Introduction - - 4.3.3 Effect of soil cover practice on above ground weed density - - 4.3.4 Effect of soil cover practice on weed diversity using shannon weiner index - - 4.3.5 Effect of soil cover practice on weed diversity using simpsons diversity index - - 4.3.6 Effect of soil cover practice on yield - - 4.3.7 Discussion objective 3 - - 4.3.8 Conclusion objective 3 - - 4.4 Effect of intercropping on overall crop performance under ca system - - 4.4.1 Introduction - - 4.4.2 Effect of intercropping on maize yield - - 4.4.3 Effect of intercropping on soybean yield - - 4.4.4 Land equivalence ratio (LER) - - 4.4.5 Effect of intercropping on key maize crop growth parameters - - 4.4.6 Discussion - - 4.4.7 Conclusion - - Ch 5: Implication of the study - - Ch 6: Conclusion and recommendation - -
Item type: PHD Dissertations
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Ch 1: Introduction - -
1.0 Introduction - -
1.1 Background of the study - -
1.1.1 Historical and contextual background - -
1.1.2. Small holder farmer - -
1.1.3 Conservation agriculture (ca) and its principles - -
1.1.4. Soil weed seed bank - -
1.1.5 Integrated weed management in conservation agriculture - -
1.2 Statement of the problem - -
1.3 Justification of the study - -
1.4 Objectives of the study - -
1.4.1 Major objective - -
1.4.2 Specific objectives - -
1.5 Research hypothesis - -
1.6 Definition of key terms - -
1.6.1 Conservation agriculture - -
1.6.2 Soil cover - -
1.6.3 Soil seed bank or weed seed bank - -
1.6.4 Minimum tillage (mt) - -
1.6.5 Integrated weed management - -
1.6.6 Ecological weed management - -
1.6.7 Hand weeding - -
1.6.8 Hand hoeing - -
1.6.9 Intercropping - -
1.6.10 Mowing - -
1.6.11 Cutting - -
1.6.12 Dredging and chaining - -
1.7 Conceptual framework - -
1.8. Philosophical under pinning of this research - -
Ch 2: Literature review - -
2.0 Introduction - -
2.1 Climate change - -
2.2 Conservation agriculture for sustainability (energy use efficiency and soil health) - -
2.2.1 Relating conservation agriculture with the soil seed bank - -
2.2.2 Crop performance and yield under CA - -
2.2.3 Mechanization of conservation agriculture - -
2.2.4 CA policy and institutional support implications for developing countries - -
2.2.5 Effect of CA on soil health - -
2.2.6. Effect of CA on weeds - -
2.3 Weed ecology - -
2.4 Weed dynamics - -
2.5 Weed management - -
2.5.1 Mechanical and manual weed control - -
2.5.2 Cultural weed control - -
2.5.3 Chemical weed management - -
2.5.4 Preventive weed management - -
2.5.5. Herbicide tolerant crops (HTC) - -
2.5.6 Biological weed control - -
2.6 Integrated weed management in CA - -
2.7. Soil seed banks - -
2.8 Estimation of the soil seed bank - -
2.9.0 Effect of crop management practice on weeds and crop yield - -
2.9.1 Effect of tillage practice on weeds - -
2.9.2 Effect of soil cover on weeds - -
2.9.3 Effect of intercropping on crop yield and performance - -
2.9.4 Yield and weed response to diversified crop rotations - -
2.9.5 Integrated weed management in perspective - -
2.9.6 Conclusion and future prospect of ca for Uganda - -

Chapter three: research methodology - -
3.1 objective 1. To compare three seed bank estimation techniques for detecting treatment
Differences and determining seed density and species composition - -
3.1.1 Introduction - -
3.1.2 Study site - -
3.1.3 Materials - -
3.1.4 Experimental design and layout - -
3.1.5 Data collection - -
3.1.6 Statistical analysis - -
3.2 Objective 2: to determine the effect of tillage practice on weed density, diversity and
Crop performance - -
3.2.1 Materials - -
3.2.2 Methods: experimental design and crop management - -
3.2.3 Data collection - -
3.2.3.1 Weed density - -
3.2.3.2 Weed community - -
3.2.3.3 Leaf area index (lai) and plant height (cm) - -
3.2.3.4 Stand count - -
3.2.3.5 Days to 50% flowering - -
3.2.3.6 plant height - -
3.2.3.7 Pod number - -
3.2.3.8 Pod length - -
3.2.3.9 Disease and pest incidence - -
3.2.3.10 Grain yield - -
3.2.3.11 Rainfall (mm) and daily temperature (OC) - -
3.2.3.12 Data sheet - -
3.2.3.13 Global positioning system receiver (GPS receiver) - -
3.2.14 Statistical analysis - -
3.3 Objective 3: to determine the effect of soil cover on weed density, diversity and crop
Performance - -
3.3.1 Materials - -
3.3.2 Methods: experimental design and crop management - -
3.3.3 Data collection - -
3.3.4 Statistical analysis - -
3.4 Objective 4: to determine the effect of the intercrops on overall crop performance in
Conservation agricultural systems - -
3.4.1 Materials - -
3.4.2 Methods experimental design and crop management - -
3.4.3 Data collection - -
3.4.4 Data analysis - -
3.5 Ethical consideration - -
3.6 Limitation of the study - -
Ch:4 Result Presentations, analysis and discussion of findings - -
4.0 Comparison of three soil seed bank estimation techniques for detecting treatment
differences and determining seed density and species composition - -
4.1.1 Introduction - -
4.1.2 Comparison of the three soil seed bank estimation methods to measure soil seed
bank weed density - -
4.1.2 Comparison of the three soil seed bank estimation methods to measure weed
diversity - -
4.1.3 Effect of tillage and soil cover on soil seed bank - -
4.1.4 Effect of season on soil seed bank density - -
4.1.5 Effect of season on soil seed bank diversity - -
4.1.6 Discussion for the comparison of three soil seed bank estimation techniques for
detecting treatment differences and determining soil seed density and diversity - -
4.1.7 Conclusion - -
4.2 Effect of tillage practice on weed density, diversity and crop performance - -
4.2.1 Introduction - -
4.2.2. Effect of rainfall amount and number of rainy days on weed density and diversity - -
4.2.3 Effect of tillage practice on weed density - -
4.2.4 Effect of tillage practice on weed diversity using shannon weiner index - -
4.2.5 Effect of tillage practice on weed diversity using simpsons diversity index - -
4.2.6 Effect of tillage practice on yield - -
4.2.7 Effect of tillage practice x soil cover practice x season interaction on above ground
weed density - -
4.2.8 Effect of tillage practice x soil cover practice x season interaction on above ground
weed diversity - -
4.2.9 Discussion and conclusion objective 2 - -
4.3 Effect of soil cover practice on weed density, diversity and crop performance - -
4.3.1 Introduction - -
4.3.3 Effect of soil cover practice on above ground weed density - -
4.3.4 Effect of soil cover practice on weed diversity using shannon weiner index - -
4.3.5 Effect of soil cover practice on weed diversity using simpsons diversity index - -
4.3.6 Effect of soil cover practice on yield - -
4.3.7 Discussion objective 3 - -
4.3.8 Conclusion objective 3 - -
4.4 Effect of intercropping on overall crop performance under ca system - -
4.4.1 Introduction - -
4.4.2 Effect of intercropping on maize yield - -
4.4.3 Effect of intercropping on soybean yield - -
4.4.4 Land equivalence ratio (LER) - -
4.4.5 Effect of intercropping on key maize crop growth parameters - -
4.4.6 Discussion - -
4.4.7 Conclusion - -
Ch 5: Implication of the study - -
Ch 6: Conclusion and recommendation - -

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