TL;DR: In this paper, landscape characteristics of sixty-two subcatchments within the Saginaw Bay Catchment of central Michigan were examined to identify relationships with stream water chemistry using multivariate and regression analyses.
Abstract: 1. Landscape characteristics of sixty-two subcatchments within the Saginaw Bay Catchment of central Michigan were examined to identify relationships with stream water chemistry. Land use, land cover and elevation were quantified for both entire catchments and the upland–river ecotone (100 m stream buffer strip). Catchment and ecotone data were then empirically compared with stream water chemistry using multivariate and regression analyses. Redundancy analysis was used to partition variance among land use, geology, and the shared influence of land use and geology.
2. Major catchments dominated by rowcrop agriculture had the highest alkalinity, total dissolved solids and nitrate + nitrite concentrations.
3. Strong seasonal differences were observed in total nitrogen and nitrite + nitrate, but not in total phosphorus or suspended solids. Land use and landscape structure factors such as slope and patch density (number of land use patches per km2) accounted for most of the observed variance in summer.
4. In both autumn and summer, landscape factors accounted for much of the observed variation in total dissolved solids and alkalinity. During autumn, geological factors and the shared influence of geology/landscape structure plus land use exerted more influence than did land use alone.
5. Total phosphorus and total suspended solids were much better explained by land use within the stream ecotone in summer than in other seasons. However, total nitrogen, nitrate, orthophosphate and alkalinity were equally well explained by land use within the ecotone and throughout the whole catchment. Only total dissolved solids in summer and ammonium in autumn were explained better by the whole catchment than the ecotone.
6. Our results show that relatively coarse spatial databases can provide useful descriptors of regional water quality.
TL;DR: The current knowledge on mitigation strategies to reduce pesticide inputs into surface water and groundwater, and their effectiveness when applied in practice is reviewed, and recommended measures considered both effective and feasible are recommended for implementing at the farm and catchment scale.
TL;DR: In this article, the authors present a survey of the current trends in Soil and Water Conservation in the USA and present a method to detect and mitigate the effects of soil erosion.
Abstract: Preface Foreword 1 SOIL AND WATER CONSERVATION 1.1. Why Conserve Soil? 1.2. Agents that Degrade Soil 1.3. Soil Erosion 1.4. History of Soil Erosion 1.5. Consequences of Soil Erosion 1.6. Drivers of Soil Erosion 1.7. Erosion in the USA 1.8. Global Distribution of Soil Erosion 1.9. Current Trends in Soil and Water Conservation Summary Study Questions References 2 WATER EROSION 2.2. Types 2.3. Processes 2.4. Factors 2.5. Agents 2.6. Rainfall Erosivity 2.7. Runoff Erosivity 2.8. Soil Properties Affecting Erodibility 2.9. Measuring Erosion Summary Study Questions References 3 WIND EROSION 3.1. Processes 3.2. Factors 3.3. Wind Erosivity 3.4. Soil Erodibility 3.5. Measuring Wind Erosion 3.6. Management of Wind Erosion 3.7. Windbreaks 3.8. Crop Residues 3.9. Perennial Grasses 3.10. Conservation Tillage Summary Study Questions References 4 MODELING WATER AND WIND EROSION 4.1. Modeling Erosion 4.2. Empirical Models 4.3. Universal Soil Loss Equation (USLE) 4.4. Modified USLE (MUSLE) 4.5. Revised USLE (RUSLE): 4.6. Process-Based Models 4.7. Water Erosion Prediction Project (WEPP) 4.8. Ephemeral Gully Erosion Model (EGEM) 4.9. Other Water Erosion Models 4.10. Modeling Wind Erosion 4.11. Wind Erosion Equation (WEQ) 4.12. Revised WEQ (RWEQ) 4.13. Process-Based Models 4.14. Wind Erosion Prediction System (WEPS) 4.15. Other Wind Erosion Models 4.16. Limitations of Water and Wind Models Summary Study Questions References 5 TILLAGE EROSION 5.1. Definition and Magnitude of the Problem 5.2. Tillage Erosion Research: Past and Present 5.3. Tillage Erosion versus Water and Wind Erosion 5.4. Factors Affecting Tillage Erosion 5.5. Landform Erodibility 5.6. Soil Erodibility 5.7. Tillage Erosivity 5.8. Tillage Erosion and Soil Properties 5.9. Indicators of Tillage Erosion 5.10. Measurement of Soil Displacement 5.11. Tillage Erosion and Crop Production 5.12. Management of Tillage Erosion 5.13. Tillage Erosion Modeling 5.14. Predictive Equations 5.15. Computer Models 5.16. Soil Erosion and Crop Harvesting Summary Study Questions References 6 BIOLOGICAL MEASURES OF EROSION CONTROL 6.1. Functions of Canopy Cover 6.2. Soil Amendments 6.3. Cover Crops 6.4. Crop Residues 6.5. Residue Harvesting for Biofuel Production 6.6. Bioenergy Plantations as an Alternative to Crop Residue Removal 6.7. Manuring 6.8. Soil Conditioners: Polymers 6.9. Polyacrylamides Summary Study Questions References 7 CROPPING SYSTEMS 7.1. Fallow Systems 7.2. Summer Fallows 7.3. Monoculture 7.4. Crop Rotations 7.5. Cover Crops 7.6. Cropping Intensity 7.7. Row Crops 7.8. Multiple Cropping 7.9. Double Cropping 7.10. Relay Cropping 7.11. Intercropping 7.12. Contour Farming 7.13. Strip Cropping 7. 14. Contour Strip Cropping 7.15. Land Equivalent Ratio 7.16. Organic Farming Summary Study Questions References 8 NO-TILL FARMING 8.1. Seedbed and Soil Tilth 8.2. Factors Affecting Soil Tilth 8.3. Tilth Index 8.4. Tillage 8.5. Tillage Tools 8.6. Types of Tillage Systems 8.7. Conventional Tillage: Moldboard Plowing 8.8. Conservation Tillage Systems 8.9. No-Till Farming 8.10. Benefits of No-Till Farming 8.11. Challenges in No-Till Management 8.12. No-Till and Subsoiling 8.13. Reduced Tillage 8.14. Mulch Tillage 8.15. Strip Tillage 8.16. Ridge Tillage Summary Study Questions References 9 BUFFER STRIPS 9.1. Importance 9.2. Mechanisms of Pollutant Removal 9.3. Factors Influencing the Performance of Buffer Strips 9.4. Types and Management 9.5. Riparian Buffer Strips 9.6. Filters Strips 9.7. Grass Barriers 9.8. Grass Waterways 9.9. Field Borders 9.10. Modeling of Sediment Transport through Buffer Strips Summary Study Questions References 10 AGROFORESTRY 10.1. Importance 10.2. Classification 10.3. History 10.4. Current Trends 10.5. Functions of Agroforestry 10.6. Agroforestry and Factors of Soil Erosion 10.7. Agroforestry and Land Rec
TL;DR: In this article, a range of policy initiatives have been promoted in recent years to address the decline of bee populations in Europe and North America, among these has been the establishment of flower-rich habitat within or around intensively farmed landscapes to increase the availability of pollen and nectar resources.
TL;DR: In this paper, the authors report on a study to elicit the factors explaining adoption of soil erosion control practices in Belgium using a socio-psychological approach, the theory of planned behaviour (TPB).