Global ETD Search

11	Effects of the Base Cation Saturation Ratio Approach to Soil Management on Weeds and Crop Yield, and Improved Methodology for Measuring Soil Aggregate Stability Leiva Soto, Andrea 29 September 2022 (has links) No description available. Agriculture Agronomy Soil Sciences Soil balancing BCSR soil calcium soil magnesium gypsum epsom weed seedbank soil pH limestone soil aggregates wet sieving
12	Effect of Alliaria petiolata management on post-eradication seed bank dynamics Thompson, Chloe 01 September 2023 (has links) (PDF) ABSTRACT Alliaria petiolata (garlic mustard) is an aggressive non-native and invasive forb that negatively impacts native arbuscular mycorrhizal communities and inhibits or prevents the growth of native plant species. Invasive species mitigation and management strategies that use native revegetation vary in success. This study focuses on which species naturally regenerate in areas where A. petiolata has been mitigated to help inform restoration efforts. Seedling emergence of species within the seed bank of four plot types (uninvaded, invaded, chemically treated, and mechanically treated) were observed two years post restoration efforts to determine which native species are likely to persist to seedlings following management. Species abundance and percent cover of all plant species were recorded to evaluate the presence of species in addition to plant health and physiological differences. Native species abundance was significantly reduced within herbicide treated plots as compared to untreated and invaded plots (p=0.02). Plots treated with mechanical removal had the greatest percent cover of native plants as compared to all other plot types but were dominated by colonizing species which is typical of a disturbed habitat. Mechanical removal also resulted in a greater abundance and stability among functional groups of native species, than those treated with herbicide. Forb species dominated coverage of plots over other functional groups when treated with herbicide. Alliaria petiolata invasion and management methods significantly impacted forb and graminoid species, as they had significantly lower abundance in plots treated with herbicide. The results demonstrate that the method of removal as well as the presence of A. petiolata affects emergence of plant species from the seedbank. The additional disturbance of mechanical removal may alter successional trajectories following invasion. Herbicide treatment resulted in the most similar species abundance as the uninvaded reference plots, which had the lowest seedling emergence and percent cover. invasive species alliaria petiolata arbuscular mycorrhizzal fungi garlic mustard seedbank study seedling emergence invasive species management mitigation methodology percent cover species abundance Forest Management Other Ecology and Evolutionary Biology Other Forestry and Forest Sciences Population Biology
13	Farming systems and landscape context: effects on biodiversity and biocontrol / Einfluss von Bewirtschaftungsweise und Landschaftskomplexität auf Biodiversität und biologische Schädlingskontrolle Roschewitz, Indra 19 May 2005 (has links) No description available. 630 Landwirtschaft Veterinärmedizin Agricultural Sciences Landschaft Landschaftskomplexität ökologischer Landbau konventioneller Landbau Artenschutz Biodiversität Getreide Winterweizen Getreideblattläuse Biologische Schädlingskontrolle Niedersachsen Betadiversität Ackerwildkräuter Samenbank Sameneinflug Carabidae Araneae Blattlausparasitoide natürliche Feinde Prädatoren Ressourcenkonzentration Landscape context landscape complexity organic farming conventional farming conservation biodiversity cereal fields winter wheat cereal aphids biological control Lower Saxony beta diversity additive partitioning arable weeds seedbank seed rain Carabidae Araneae aphid parasitoids natural enemies predators resource concentration 48.16 48.54 48.63 YA
14	Plant communities in organic and conventional agriculture - comparing local, landscape and regional effects / Ackerwildpflanzengesellschaften in ökologischer und konventioneller Landwirtschaft - die Bedeutung von Standort, Landschaft und Region Gabriel, Doreen 03 February 2006 (has links) No description available. 630 Landwirtschaft Veterinärmedizin Agricultural Sciences Ackerwildkräuter Ackerland Agrarumweltprogramme Beta Diversität Biodiversität Geographische Informationssysteme Getreide Landschaft Landschaftskomplexität Landschaftsökologie konventioneller Landbau ökologischer Landbau Naturschutz Insektenbestäubung räumliche Skala Samenbank Sameneinflug Unkräuter Winterweizen zeitliche Skala additive partitioning agri-environment schemes arable weeds arable crop beta diversity biodiversity cereal fields conventional farming community composition conservation functional scale geographic information system GIS insect pollination inter-annual variability landscape context landscape complexity landscape ecology organic farming seedbank seed rain spatial turnover temporal turnover Triticum aestivum winter wheat 48.16 YA

Page generated in 0.0456 seconds