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Environmental Horticulture Courses (ENH)

  • Lower division courses
    • ENH 1 - Introduction to Environmental Horticulture/Urban Forestry
    • ENH 6 - Introduction to Environmental Plants
  • Upper division courses
    • ENH 100 - Urban Forestry
    • ENH 101 - Trees of the Urban Forest
    • ENH 105 - Taxonomy and Ecology of Environmental Plant Families
    • ENH 120 - Management of Container Media
    • ENH 125 - Greenhouse and Nursery Crop Production
    • ENH 129 - Analysis of Horticulural Problems
    • ENH 130 - Turfgrass and Amenity Grassland Utilization and Management
    • ENH 133 - Woody Plants in the Landscape: Growth, Ecology and Management
    • ENH 150 - Genetics and Plant Conservation: The Biodiversity Crisis
    • ENH 160 - Restoration Ecology
    • ENH 160L - Restoration Ecology Laboratory
  • Graduate courses
    • ENH 229 - Analysis of Horticultural Problems
Course -  ENH 1
Title - Introduction to Environmental Horticulture/Urban Forestry
Instructor - Burger
Units - 3
Quarter Offered - Fall
Prerequisites - None
Catalog Description - Introduction to the use of plants to enhance the physical, visual and social environment. The use of ecological principles in developing sustainable, low maintenance landscape systems will be presented. Career opportunities will be discussed.
Summary - None
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Course -  ENH 6
Title - Introduction to Environmental Plants
Instructor - Young
Units - 4
Quarter Offered - Fall
Prerequisites - None
Catalog Description - Classification, nomenclature and variation of environmental plants. The use of floral and vegetative characteristics and terminology to key unknown plants. Characteristics of plant groups and basics of climate, soils and plant selection. Identification of 150 common landscape plants.
Summary - None
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Course -  ENH 100
Title - Urban Forestry
Instructor - Harding
Units - 4
Quarter Offered - Fall
Prerequisites - Biological Sciences 1C or Plant Sciences 2.
Catalog Description - Principles and practices of planning and managing urban vegetation. Basics of tree appraisal, natural resource inventory, and development of long term urban forest management plans.
Summary - None
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Course -  ENH 101
Title - Trees of the Urban Forest
Instructor - Harding
Units - 2
Quarter Offered - Fall
Prerequisites - ENH 6 or consent of instructor
Catalog Description - Identification and evaluation of 200 tree species of the urban forest on campus, in the Arboretum, and in the city of Davis; appraised and aesthetic values, condition, and branch structure; contribution of trees to this ecosystem. Bicycle required.
Summary - Appraised value and its components
- species rating
- leaf and root condition
- primary and secondary branching
- trunk and canopy diameter
- tree height, location and site
Contribution to the ecosystem and its components - leaf area
- shade and energy conservation
- carbon dioxide sequestration
- water consumption
- storm water conservation
Aesthetic parameters of tree species for street, park or residential use  
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Course -  ENH 102
Title - Physiological Principles in Environmental Horticulture
Instructor - Burger
Units - 4
Quarter Offered - Fall
Prerequisites - Biological Sciences 1C
Catalog Description - Physiological principles and processes essential to floriculture, nursery crop production, turfculture and landscape horticulture. Emphasis on the control of vegetative and reproductive development for a broad species range in greenhouse and extensive landscape environments.
Summary - None
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Course -  ENH 105
Title - Taxonomy and Ecology of Environmental Plant Families
Instructor - Harding
Units - 4
Quarter Offered - Spring
Prerequisites - course 6 or consent of instructor.
Catalog Description - Classification and identification of introduced and native species used in urban forests, with emphasis on floral and vegetative characteristics of the prominent families of angiosperms and gymnosperms, adaptations to environmental variations in western landscapes, and horticultural classification.
Summary - None
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Course -  ENH 120
Title - Management of Container Media
Instructor - Evans
Units - 3
Quarter Offered - Fall
Prerequisites - Soil Science 10
Catalog Description - Principles of soil science and practices related to management of container media are taught, emphasizing appropriate use of soils and amendments, irrigation, and fertilizers.Physical and chemical properties are tested and effects of management on crops are evaluated in the laboratory.
Summary - None
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Course -  ENH 125
Title - Greenhouse and Nursery Crop Production
Instructor - Lieth
Units - 5
Quarter Offered - Winter
Prerequisites - Agricultural Systems and Environment 2 or Biological Sciences 1C.
Catalog Description - Principles and techniques for the production of ornamental greenhouse and nursery crops. Hands-on experience producing greenhouse crops. Optional weekend field trip.
Summary -    1. Industry Overview
         1. Historical
         2. Plant materials/traits
         3. Cultural practices
   2. The Greenhouse and Nursery Environment
         1. Greenhouse structure, layout, design
         2. Temperature control: heating and cooling systems
         3. Greenhouse environment control computers
         4. Greenhouse and nursery soils: their design and preparation
         5. Irrigation systems and control
         6. Fertilization and plant nutrition
   3. Manipulation of Greenhouse/Nursery Environment for Optimal Crop Production
         1. Ecological principles
         2. Temperature manipulation: crop development, DIF temperature
         3. Shading and lighting
         4. CO2 enrichment
         5. Relative humidity control
   4. Cultural Practices for Controlling Crop Growth
         1. Chemical growth control
         2. Environmental growth control
         3. Physical growth control
   5. Integrated Pest and Disease Management
         1. Insect and mite pests - conventional and biological control
         2. Disease - fungi, bacteria, nematodes
         3. IPM practices
         4. Regulatory issues
   6. Marketing, Business Practices
   7. Postharvest Handling of Ornamental Crops 
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Course -  ENH 129
Title - Analysis of Horticultural Problems
Instructor - Durzan
Units - 4
Quarter Offered - Spring
Prerequisites - Environmental Horticulture 102, Entomology 110, Plant Pathology 120, and Soil Science 100, or equivalents
Catalog Description - Methods of analysis of common plant disorders seen in the landscape, greenhouse, and nursery. Diagnosis of plant disorders caused by soil, water, insects, disease, chemical agents, climatic conditions or cultural practices. Approaches to diagnosis that emphasize acquisition and integration of information.
Summary - 1) Introduction to diagnostic methods.
2) Problems caused by pathogens.
3) Problems caused by insects.
4) Problems caused by agricultural chemicals.
5) Problems related to water quality and irrigation.
6) Nutrient deficiencies and mineral toxicities.
7) Problems related to soil physical properties.
8) Problems related to temperature and light.
9) Problems caused by air pollution.
10) Site analysis.
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Course -  ENH 130
Title - Turfgrass and Amenity Grassland Utilization and Management
Instructor - Burger
Units - 4
Quarter Offered - Spring
Prerequisites - Biological Sciences 1C or Plant Sciences 2.
Catalog Description - Utilization and management of amenity and landscape grassland systems. Emphasis on biology of grass species, ecology and culture practice of sports turf and landscape grassland systems, social and environmental benefits, environmental impacts, and integrated management systems.
Summary - None
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Course -  ENH 133
Title - Woody Plants in the Landscape: Growth, Ecology and Management
Instructor - Berry
Units - 4
Quarter Offered - Winter
Prerequisites - Biological Sciences 1C or the equivalent preparation in plant biology.
Catalog Description - Principles and practices of managing trees and shrubs in the urban landscape and other managed environments. Topics include woody plant form; growth response and adaptation; tree management in relation to soil, moisture, climate; plant problems.
Summary - None
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Course -  ENH 150
Title - Genetics and Plant Conservation: The Biodiversity Crisis
Instructor - Jasieniuk, Chetelat, Ledig
Units - 3
Quarter Offered - Spring
Prerequisites - Biological Sciences 1C or the equivalent
Catalog Description - Conservation of genic diversity, measurement of diversity, threats to diversity and reasons for protection, the process of extinction, distribution of diversity, determination of what to conserve and means of conservation. Examples drawn largely from forest tree species.
Summary - None
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Course -  ENH 160
Title - Restoration Ecology
Instructor - Eviner
Units - 3
Quarter Offered - Spring
Prerequisites - Plant Biology/Evolution & Ecology 117 or Evolution & Ecology 121 or Plant Biology 147 or equivalent course in ecology/plant ecology.
Catalog Description - Conceptual bases of restoration ecology; tools used by restoration ecologists to solve practical problems; scope and success of actual restoration projects.
Summary - We will explore the current state of restoration ecology, in theory and practice. This will include a review of the conceptual bases of restoration ecology (including succession, assembly, recruitment limitation, plant/animal interactions, and landscape scale phenomena). It will also address particular operational problems in restoration (genetics, horticultural plant propagation, hydrological regimes, biogeochemistry, exotic species, fire and grazing, and policy). This will be supported by descriptions of several active restoration sites.

Course Outline:

Introduction
- What is restoration ecology?
- What are the goals of restoration?
- The marriage of ecology and horticulture
- What is a native plant?
- What is the reference community?
- Levels of intervention, organizational levels
Soils and Hydrology
- Restoration of soils
- Restoration of hydrological regimes
- Restoration after fire: erosion control and plant establishment
Core Ecological Concepts
- Genetics of ecological restoration
- Succession as a conceptual basis for restoration ecology
- Assembly as a conceptual basis for restoration ecology
- Recruitment limitation and the importance of the seedling stage
- Plant propagation
- Exotic species in theory and practice
- Fire and grazing as natural forces and restoration tools
- Other kingdoms in restoration ecology; mutualists and modifers
- Landscape ecology of restoration I: edges, buffers, corridors
- Landscape ecology of restoration II: isolation and mosaics
Ecological Restoration in Practice
- Wetlands and riparian restoration
- Grassland (and forest) restoration
- Law, policy, and restoration
- What is the future of restoration ecology?
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Course -  ENH 160L
Title - Restoration Ecology Laboratory
Instructor - Eviner
Units - 1
Quarter Offered - Spring
Prerequisites - course 160 (prerequisite or concurrent)
Catalog Description - Companion field course to course 160. A series of part-day and all day visits to various field sites, involving site evaluations, guest field presentations by local restorationists, and actual restoration activities.
Summary - Discussions
A two-hour lecture/discussion in the first week will cover such topics as principles of restoration, course mechanics, and field trip logistics and safety. In addition, the students, TA, and professor will work together to develop a site evaluation form that will be used (and adapted) throughout the course (see below).

A two-hour lecture/discussion at the end of the course will be a synthetic review of the various sites and techniques experienced during the course.

Organized field trips
(these may be changed to suit changing opportunities):
- Local restoration sites (Wildhorse, Mace Blvd, Putah Creek Riparian Reserve), 4.5 hours
- Delta wetlands restoration (Hartland Restoration), 4.5 hours
- Invasive species control in a coastal prairie (Bodega Marine lab), 8 hours
- Grassland restoration and the farm/restoration interface (Hedgerow Farms), 4.5 hours
- Restoring historical flood regimes (Cosumnes Reserve), 4.5 hours
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Course -  ENH 229
Title - Analysis of Horticultural Problems
Instructor - Durzan
Units - 5
Quarter Offered - Spring
Prerequisites - Equivalent of BS degree in Environmental Horticulture and Urban Forestry, Plant Biology, Agricultural Systems & Environment, or related major, or consent of Instructor.
Catalog Description - Methods of analysis of common plant disorders seen in the landscape, greenhouse, and nursery. Diagnosis of plant disorders caused by soil, water, insects, disease, chemical agents, climatic conditions or cultural practices. Approaches to diagnosis that emphasize acquisition and integration of information.
Summary -

1) Introduction to diagnostic methods. 2) Problems caused by pathogens. 3) Problems caused by insects. 4) Problems caused by agricultural chemicals. 5) Problems related to water quality and irrigation. 6) Nutrient deficiencies and mineral toxicities. 7) Problems related to soil physical properties. 8) Problems related to temperature and light. 9) Problems caused by air pollution. 10) Site analysis.  

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