In vielen Städten wird zurzeit der Versuch unternommen, Staudenpflanzungen zur Steigerung der Qualität des Stadtbildes einzubringen. Die Pflanzungen sollen einem gewissen Qualitätsstandard genügen und gleichzeitig soll ihre Pflege möglichst geringe Kosten verursachen. In vorliegender Untersuchung wurden ästhetische und pflegerische Aspekte von Staudenpflanzun¬gen im Hinblick auf ihre Anwendung für das öffentliche Grün untersucht. Dabei ging es in erster Linie darum, das Verhältnis zwischen der ästhetischen Wirkung von Pflanzungen unterschiedlicher Artenzahl zum Pflegeaufwand zu ermitteln. Zusätzlich wurde der Einfluss eines zusätzlichen Rück-schnittes einzelner Arten im Sommer auf die genannten Faktoren untersucht. Um zu einem differenzierten Bild zu gelangen wurde außerdem eruiert, welche Rolle der Flächendeckungsgrad, die unerwünschte Beiflora sowie Krankheiten in diesem Kontext spielen.

Ozonation has been utilized for water treatment for over 100 years. During that time, the range of applications has grown considerably, and includes the remediation of nursery and greenhouse irrigation water. Ozone is dissolved into irrigation water to kill pathogens and degrade chemical contaminants. By convention, growers remove ozone from solutions, prior to distribution to the crop, to avoid phytotoxic effects. The available literature regarding aqueous ozone (O3(aq)) phytotoxicity is limited, making this a sagacious practice, although the removal does preclude any ancillary benefits beyond the point of treatment. The effects of applying O3(aq) under two irrigation systems are examined. Initial studies suggested O3(aq) concentrations as high as 20 mg⋅L-1 could be applied directly to mineral wool substrate in a limited (one time) fashion without a negative response. To be effective as a remediation tool, however, ozone would need to be applied more frequently (e.g. daily). The effects of daily O3(aq) application, via drip irrigation in mineral wool hydroponic tomato culture, was examined. In the first of two studies, daily applications of 3.0 mg⋅L-1 O3(aq) elicited an overall positive growth response. In a follow-up study, 6.0 mg L-1 elicited a negative response. Nursery operators often utilize overhead irrigation. A study was conducted to determine if overhead irrigation utilizing O3(aq) was compatible with select woody perennial nursery species. The amount of ozone lost from solution during application was examined, as well as crop response to the ozone environment generated. It was shown that 60 to 70% of the ozone was unaccounted for at canopy level, while phytotoxic effects were elicited at emitter concentrations above 1.5 mg L-1. Marchantia polymorpha is a significant weed species in greenhouse and nursery production; a species with few control options. Anatomical features of M. polymorpha suggested sensitivity to O3(aq). Studies were performed to examine contact time (CT) and exposure frequencies required for M. polymorpha suppression. A CT of 0.84 mg⋅L-1⋅min at an application frequency of 3-times/week achieved measurable suppression. / Natural Science and Engineering Research Council (NSEARC); Ontario Ministry of Agriculture Food and Rural Affairs (OMAFRA); Ontario Centres of Excellence (OCE); Purification Research Technologies INC (PRTI); Flowers Canada (Ontario).

The diploma project deals with the construction of the catalogue houses on the outskirts of villages. In addition to the term suburban, the term subrural is introduced, which describes and names this type of construction. At the same time, the project examines the influence of advertising catalogues on the aesthetics of subrural gardens and the activities performed on them. The work comes with a proposal for an alternative subrural locality in the village of Příkazy near Olomouc. Thanks to the minimization of plots, the labor is also minimized and at the same time space is freed for public orchard running through the entire territory. This creates a diffusion of development into the agricultural landscape and on a smaller scale it creates a spectacular space around private gardens. Prefabricated bricks from hobby markets form the architectural expression of the project. From these elements are assembled objects and fragments of fences located in the landscape. At the same time, the fragments form a newly compiled catalogue, according to which inhabitants build their fences.

In vielen Städten wird zurzeit der Versuch unternommen, Staudenpflanzungen zur Steigerung der Qualität des Stadtbildes einzubringen. Die Pflanzungen sollen einem gewissen Qualitätsstandard genügen und gleichzeitig soll ihre Pflege möglichst geringe Kosten verursachen. In vorliegender Untersuchung wurden ästhetische und pflegerische Aspekte von Staudenpflanzun¬gen im Hinblick auf ihre Anwendung für das öffentliche Grün untersucht. Dabei ging es in erster Linie darum, das Verhältnis zwischen der ästhetischen Wirkung von Pflanzungen unterschiedlicher Artenzahl zum Pflegeaufwand zu ermitteln. Zusätzlich wurde der Einfluss eines zusätzlichen Rück-schnittes einzelner Arten im Sommer auf die genannten Faktoren untersucht. Um zu einem differenzierten Bild zu gelangen wurde außerdem eruiert, welche Rolle der Flächendeckungsgrad, die unerwünschte Beiflora sowie Krankheiten in diesem Kontext spielen.

Agriculture has an important role in Turkey / hence automated approaches are crucial to maintain sustainability of agricultural activities. The objective of this research is to classify eight crop types cultivated in Karacabey Plain located in the north-west of Turkey using multi-temporal Kompsat-2 and Envisat ASAR satellite data. To fulfill this objective, first, the fused Kompsat-2 images were segmented separately to define homogenous agricultural patches. The segmentation results were evaluated using multiple goodness measures to find the optimum segments. Next, multispectral single-date Kompsat-2 images with the Envisat ASAR data were classified by MLC and SVMs algorithms. To combine the thematic information of the multi-temporal data set, probability maps were generated for each classification result and the accuracies of the thematic maps were then evaluated using segment-based manner. The results indicated that the segment-based approach based on the SVMs method using the multispectral Kompsat-2 and Envisat ASAR data provided the best classification accuracies. The combined thematic maps of June-August and June-July-August provided the highest overall accuracy and kappa value around 92% and 0.90, respectively, which was 4% better than the highest result computed with the MLC method. The produced thematic maps were also evaluated based on field-based manner and the analysis revealed that the classification performances are directly proportional to the size of the agricultural fields.

ABSTRACT DECISION TREE CLASSIFICATION OF MULTI-TEMPORAL IMAGES FOR FIELD-BASED CROP MAPPING Sencan, Se&ccedil / il M. Sc., Department of Geodetic and Geographic Information Technologies Supervisor: Assist. Prof. Dr. Mustafa T&uuml / rker August 2004, 125 pages A decision tree (DT) classification approach was used to identify summer (August) crop types in an agricultural area near Karacabey (Bursa), Turkey from multi-temporal images. For the analysis, Landsat 7 ETM+ images acquired in May, July, and August 2000 were used. In addition to the original bands, NDVI, PCA, and Tasselled Cap Transformation bands were also generated and included in the classification procedure. Initially, the images were classified on a per-pixel basis using the multi-temporal masking technique together with the DT approach. Then, the classified outputs were applied a field-based analysis and the class labels of the fields were directly entered into the Geographical Information System (GIS) database. The results were compared with the classified outputs of the three dates of imagery generated using a traditional maximum likelihood (ML) algorithm. It was observed that the proposed approach provided significantly higher overall accuracies for the May and August images, for which the number of classes were low. In May and July, the DT approach produced the classification accuracies of 91.10% and 66.15% while the ML classifier produced 84.38% and 63.55%, respectively. However, in August nearly the similar overall accuracies were obtained for the ML (70.82%) and DT (69.14%) approaches. It was also observed that the use of additional bands for the proposed technique improved the separability of the sugar beet, tomato, pea, pepper, and rice classes.