Tree Nursery Practices Quiz

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Questions and Answers

What is the primary purpose of a tree nursery?

  • To grow mature trees for immediate harvesting
  • To store seeds for long-term preservation
  • To produce tree seedlings until they are ready for planting (correct)
  • To conduct research on tree diseases

What distinguishes a temporary nursery from a permanent nursery?

  • Permanent nurseries are only for native species
  • Temporary nurseries are larger in size than permanent nurseries
  • Permanent nurseries require more labor than temporary nurseries
  • Temporary nurseries meet small reforestation and tree planting targets (correct)

Which benefit is associated with small-scale nurseries being near the planting site?

  • Easier control of nursery diseases
  • Improved soil quality for plant growth
  • Reduction in transport time and cost (correct)
  • Availability of more advanced nursery technology

Which of the following factors is NOT a benefit of small-scale nurseries?

<p>Production of larger quantities of seedlings (B)</p> Signup and view all the answers

What is a key feature of a permanent nursery?

<p>Supplies nursery stock on a long-term basis (B)</p> Signup and view all the answers

How do small-scale nurseries generally accommodate the needs of farmers?

<p>By better provisioning for species and numbers of seedlings (C)</p> Signup and view all the answers

Which of the following statements is accurate regarding the features of tree nurseries?

<p>Nurseries can vary widely in size and facilities (B)</p> Signup and view all the answers

Why is it easier to isolate diseases in small-scale nurseries?

<p>They generally have fewer plants in a confined area (A)</p> Signup and view all the answers

What are the three principal components of organic matter?

<p>Plant residues, animal residues, live microorganisms (D)</p> Signup and view all the answers

Which type of fertilizer typically has a lower concentration of nutrient elements?

<p>Organic fertilizer (C)</p> Signup and view all the answers

Which of the following is not a poor practice of pricking out seedlings?

<p>Using a transplant bed after pricking out (A)</p> Signup and view all the answers

What is the primary benefit of providing shade for nursery plants?

<p>Reduces soil and leaf water loss (A)</p> Signup and view all the answers

What is not involved in foliar feeding?

<p>Applying nutrients directly to the soil (B)</p> Signup and view all the answers

What is an appropriate method for applying nutrients to conifer seedlings in container nurseries?

<p>Overhead sprays of nutrients (A)</p> Signup and view all the answers

What is the primary concern when pricking out seedlings?

<p>Keeping seedlings in the original seedbed too long (C)</p> Signup and view all the answers

How does shade benefit nursery plants as they develop?

<p>Maintains consistent moisture levels (A)</p> Signup and view all the answers

What factors determine the quantity of water required for a nursery?

<p>Soil type and irrigation method employed (A), Size of the nursery and number of plants (C)</p> Signup and view all the answers

What is the ideal pH range of water for seedling growth?

<p>5.5 to 7.0 (B)</p> Signup and view all the answers

What is a consequence of using water with a pH greater than 7?

<p>Favors the growth of damping off fungi (A)</p> Signup and view all the answers

Why is it advisable to locate a nursery close to the planting site?

<p>To reduce transportation challenges and costs (C)</p> Signup and view all the answers

What conditions should be avoided for the topography of a nursery?

<p>Areas prone to flooding (A)</p> Signup and view all the answers

What is a common source of water contamination for irrigation?

<p>Chemical contaminants from soil and surface runoff (B)</p> Signup and view all the answers

What should be done during heavy rainfall to prevent damage in a nursery?

<p>Construct a proper drainage system (C)</p> Signup and view all the answers

What is the consequence of excessive wind in the nursery location?

<p>Damages young plants and soil structure (A)</p> Signup and view all the answers

What is the primary reason for removing unwanted vegetation in the preparation of a permanent nursery?

<p>To eliminate competition for resources (D)</p> Signup and view all the answers

Which trees should be particularly considered for removal when preparing a nursery?

<p>Mature trees of the same species as the nursery plants (B)</p> Signup and view all the answers

Why should top soil be removed before leveling the site?

<p>To avoid muddy conditions during wet weather (C)</p> Signup and view all the answers

What is a recommended method for controlling erosion on sloped sites?

<p>Grassing exposed slopes and ridges of terraces (D)</p> Signup and view all the answers

What should be avoided when planting wind-breaks around a nursery?

<p>Using species that are potential hosts for pests (D)</p> Signup and view all the answers

When are terraces particularly recommended for construction?

<p>On slopes with more than 4 to 5 percent gradient (B)</p> Signup and view all the answers

What role does top soil play after it has been removed from the nursery site?

<p>It can be reused in potting soil or for compost (D)</p> Signup and view all the answers

What is a key consideration when selecting species for a hedge around a nursery?

<p>They should be disease-free and insect-resistant (D)</p> Signup and view all the answers

What is a crucial practice regarding shade and watering for nursery plants?

<p>Plants in heavy shade require less water. (D)</p> Signup and view all the answers

How should watering be adjusted when reducing shade for transplants?

<p>Watering must be increased as shade is decreased. (D)</p> Signup and view all the answers

What is the main purpose of root pruning in seedlings?

<p>To increase the uniformity of stock and stimulate root development. (B)</p> Signup and view all the answers

Which of the following practices is NOT associated with nursery hygiene?

<p>Using untreated containers for seedlings. (A)</p> Signup and view all the answers

What happens to seedlings when their roots grow too far into the ground?

<p>They risk breaking and suffering shock upon being lifted. (A)</p> Signup and view all the answers

Which pest is commonly found in nurseries and worsens with water stress?

<p>Gall flies (C)</p> Signup and view all the answers

What condition is described as 'damping off' in nurseries?

<p>Seedlings rot at the root collar and die. (A)</p> Signup and view all the answers

Which of the following is NOT a purpose of root pruning?

<p>Facilitate immediate transplanting without care. (B)</p> Signup and view all the answers

What is the purpose of hardening-off seedlings?

<p>To acclimate seedlings to adverse growth conditions (C)</p> Signup and view all the answers

What method should be used to control watering during the hardening-off process?

<p>Reduce watering and allow seedlings to reach their wilting point (D)</p> Signup and view all the answers

When should shading be removed from seedlings to facilitate hardening-off?

<p>One month before planting (C)</p> Signup and view all the answers

What is a potential consequence of not acclimating seedlings to full sunlight before planting?

<p>Sun scalding of leaves, leading to mortality (B)</p> Signup and view all the answers

What is the effect of elevating seedlings during the hardening-off process?

<p>Promotes aerial pruning and prevents deep root growth (D)</p> Signup and view all the answers

How should root pruning be managed for seedlings before planting?

<p>Stop root pruning two weeks before planting (A)</p> Signup and view all the answers

What should be avoided when controlling watering to prevent seedling shock?

<p>Allowing seedlings to wilt excessively (B)</p> Signup and view all the answers

Which of the following emphasizes the importance of hardening-off seedlings?

<p>It prevents exposure to adverse growth conditions (A)</p> Signup and view all the answers

Flashcards

What is a tree nursery?

A managed area designed to grow tree seedlings under controlled conditions until they are ready for planting. It can be small-scale or large-scale.

What is a temporary or flying nursery?

A nursery that is set up for a short period, often for small-scale reforestation projects.

What is a permanent nursery?

A nursery that is established to supply seedlings for a long time.

Why are small-scale nurseries beneficial?

The benefits include: shorter transit time, less overheating and windburn, lower transport costs and easier disease control.

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What factors affect the success of a nursery?

The nursery's size, resources, seedling types, and quality influence its success.

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What determines the type of nursery?

The number of plants needed and the duration of the demand.

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What's the purpose of a small-scale nursery?

A temporary nursery is often used for small reforestation projects in remote areas.

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What's the purpose of a permanent nursery?

A permanent nursery meets the long-term demand for seedlings in a wider area.

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Water Source Assessment

Checking the water source's ability to provide enough water for the nursery during the dry season, when the demand for water is highest

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Water Storage Importance

Maintaining adequate storage facilities for water, regardless of the source, to ensure a reliable supply for the nursery

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Factors Affecting Water Needs

The amount of water needed for a nursery depends on factors like soil type, plant species, number of seedlings, and irrigation method

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Water Needs and Soil Type

Sandy soils need more water than clay soils due to their lower water-holding capacity

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Ideal Water pH

The pH of water used for irrigation should be between 5.5 and 7 to prevent fungal infections and promote seedling growth

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Water Contamination Threats

Water contamination from soil, precipitation, or runoff can introduce chemicals that harm plants

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Nursery Location Importance

Location near planting sites minimizes transport costs, labor, and provides better supervision

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Nursery Topography

Gentle slopes allow excess water to drain without soil erosion, minimizing damage during rainfall

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How does shade affect watering needs?

When plants are in heavy shade, they require less water. When in full sun, they need more. It's a common mistake to keep plants in the shade throughout the nursery production.

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What shade is needed after transplanting?

After being transplanted, seedlings need full shade for the first 2-3 weeks, then half shade for a week. Once they've adjusted, no shade is needed.

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Why is weeding important?

Removing weeds is essential to prevent competition for water and nutrients, keeping the seedlings healthy.

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What happens if roots grow too much?

If roots grow through the pot's drainage holes and into the ground, they can break when seedlings are lifted. This weakens the plant and hinders growth.

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Why prune roots?

Cutting back roots forces the plant to develop a more compact root system, improving its health and survival.

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What are the main purposes of root pruning?

Root pruning aims to increase uniformity, make planting easier, improve initial survival, encourage lateral root growth, and produce seedlings instead of transplants.

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How does nursery hygiene influence seedlings?

Maintaining a clean, healthy nursery environment leads to better quality seedlings.

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What's a common pest in nurseries?

Gall flies are a common pest in nurseries, particularly when seedlings are water-stressed. Proper watering helps control them.

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Fertilization in Nurseries

The process of providing nutrients to plants in a controlled environment, to ensure healthy growth and development.

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Organic matter

Organic matter consists of three main components: plant, animal, and microbial residues in different decomposition stages, humus, and live microorganisms.

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Nutrient Application in Container Nurseries

Nutrients are applied to conifer seedlings grown in containers through sprays overhead. But as far as we know, this method is not used for bare root nurseries.

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Pricking Out Seedlings

This refers to the act of transferring seedlings from the initial seedbed to pots or transplant beds. It involves carefully picking up and replanting the young seedlings.

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Types of Fertilizers

Fertilizers can be categorized as organic, derived from natural sources (compost, manure), and inorganic, produced synthetically (salts of nutrient elements).

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Importance of Shade in Nurseries

Shade is crucial for young plants in nurseries. It prevents excessive water loss from the soil and leaves, reducing stress and promoting healthy growth.

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How Shade Benefits Nurseries

Shade reduces water loss from soil and leaves, protecting seedlings from scorching temperatures and promoting a healthy environment for growth.

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Protection from Extreme Environments

Plants need protection from harsh weather until they are strong enough to survive on their own. Shade provides this protection, reducing water loss and regulating temperature.

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Hardening-Off

The process of gradually preparing seedlings for outdoor conditions by simulating the harsh environment they will face during planting.

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Watering Control in Hardening-Off

Reducing the amount of water given to seedlings over time before planting to accustom them to drier conditions in the field.

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Wilting Point

The point at which a seedling becomes slightly wilted due to lack of water, making it more resilient to drought conditions.

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Shading in Hardening-Off

Protecting seedlings from too much sunlight during the hardening-off process.

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Removing Shade for Hardening-Off

Removing shade from seedlings a month before planting to acclimate them to full sunlight.

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Root Pruning in Hardening-Off

Trimming the long taproot of a seedling to encourage the growth of fibrous roots, making it easier to transplant.

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Stopping Root Pruning Before Planting

Reducing the frequency of root pruning two weeks before planting to allow the seedling to develop a strong root system before transplanting.

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Why Hardening-Off is Important

The practice of hardening-off helps seedlings survive the stress of transplantation and establish themselves in their new environment.

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Why is vegetation removal essential in nursery preparation?

The initial step in establishing a permanent nursery involves clearing the land of all unwanted vegetation, including trees, shrubs, and small plants. This ensures a clean and controlled environment for seedlings.

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What is important to consider when removing trees during nursery preparation?

During vegetation removal, it's crucial to assess trees within and outside the nursery boundary. Those interfering with future activities should be removed, while beneficial ones can be saved. This includes mature trees of the same species being grown in the nursery, as they are a potential source of pests.

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Why is topsoil removal necessary in nursery preparation?

After clearing vegetation, the topsoil is removed to prevent muddy conditions during wet weather and excessive watering. The topsoil can be saved for potting mixes or compost, promoting sustainability. However, it's crucial to minimize erosion and pollution of nearby water sources.

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When is topsoil removal not necessary in nursery preparation?

Some sites have shallow or minimal topsoil, making removal unnecessary. Terraces should be constructed on slopes exceeding 4-5 percent to manage water flow and prevent erosion.

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What measures are essential for erosion control and wind damage prevention in a nursery?

Exposed slopes and terrace ridges should be grassed immediately to prevent erosion, especially during the dry season. Irrigation should be available during the dry season. If wind damage is a concern, plant windbreaks around the nursery perimeter to protect seedlings.

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How can hedges contribute to a nursery's success?

Low hedges can be planted around crucial nursery sections to further minimize wind impact, control weed seeds, and prevent dust damage. The species used for windbreaks and hedges should be disease and pest resistant.

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What is important to consider when choosing windbreak species?

The species used as a windbreak should not be the same as those growing in the nursery, as they could harbor pests and diseases. Nursery preparation requires careful planning and implementation to create a favorable environment for seedling growth.

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What is crucial for preparing the nursery soil?

Nursery soil preparation is crucial, requiring good quality soil for potting mixes and seed beds. This ensures optimal conditions for seedling growth and development.

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Study Notes

Course Information

  • Course Title/Code: Forest Seeds and Nursery Technology (Frst3091)
  • Course Credit: 3 Credit Hours and 5 ECTS
  • Instructor: Yadesa A.
  • Year: 2024

Contents

  • Nursery Establishment and Management
  • Seedling Production Techniques
  • Nursery Diseases, Pest Control
  • Record Keeping in the Nursery
  • Nursery Cost and Financial Plan

Nursery Establishment and Management

  • A tree nursery is a managed site for producing tree seedlings under favorable conditions until ready for planting.
  • Nurseries can range from informal, small-scale arrangements to large, commercial enterprises.
  • Nurseries vary in size, facilities, seedling types, quality, and quantity of planting stocks produced.

Types of Tree Nurseries

  • Temporary/Flying Nurseries: Short-term, used for small reforestation and planting in remote areas.
  • Permanent Nurseries: Long-term, high production and survival rates, have more facilities.
  • Benefits of Small-Scale Nurseries: Shorter transit time, lower transport costs, lower capital investment, and easier disease isolation.

Permanent Nurseries

  • Permanent nurseries supply nursery stock for a long period and maintain seedlings until they can be raised at a reasonable cost.
  • Key advantages include high production levels, reliable seedling survival rates, lower per-plant costs, and availability of permanent facilities and modern equipment.

Major Nursery Types

  • Institutional Nurseries (research, government, industrial)
  • Research nurseries: established and maintained by research units, usually permanent facilities operating for 5-10 years. Equipped for sophisticated tests and analysis.
  • Government Nurseries: Established by national and local government agencies
  • Industrial Nurseries: Established by large integrated wood industries, high production, and strict quality control
  • Project Nurseries: Established by projects, NGOs, and development organizations, usually 3-5 years but potentially longer
  • Individual Nurseries: Household nurseries or backyard nurseries, managed by individual farmers, vary widely in size.

Nursery Site Selection

  • Factors influencing site selection: type of nursery, environmental factors, socio-economic factors.
  • Important Environmental/Ecological Factors:
  • Water Source Reliability (continuous, adequate supply, especially during the dry season). Storage capacity is crucial. Water quality (pH 5.5-7).
  • Location (near planting/demand centers to reduce transportation)
  • Topography (gentle slope for drainage, avoid valleys and excessive wind). Drainage systems are necessary.
  • Soil (texture, adequate depth, absence of stones). Soil pH (5-6).
  • Previous land use (examine soil acidity and toxic chemicals)
  • Important Socio-economic Factors: Proximity to: •Seedling customers •Labor force (workers) •Transportation •Essential services and utilities(power, Phone) Land cost: price range, stipulations
  • Site production potential: Estimate seedling needs. A rule of thumb is about 500,000 seedlings per 0.4 hectares (1 acre), but figures vary with species and density. Subtract non-productive areas.

Nursery Layout

  • The permanent nursery should accommodate administrative, operational, and production areas.
  • Principles should be adjustable for small-scale nurseries.
  • Avoid waste ground for weeds. Plan for expansion.
  • Important components include: —Administration area (office, storage) —Operations area (extracting/drying/processing seed, potting/germination, compost production) —Production areas (for growing bare-root plants/container seedlings)
  • Normal bed width = 1.0 - 1.2 meters
  • Bed length ≤ 20 meters
  • Soil should be free of stones
  • Consider: shade/watering needs, location of walkways, appropriate materials

Seedling Production Techniques

  • Bed preparation varies by location, climate, soil, tree type, and equipment
  • Three types of seedbeds: flat, raised, sunken
  • Raised beds are better for clayey soils under high rainfall.

Nursery Management

  • Watering: plants need clean water, seedlings require more during the dry season. Avoid dirty or salty water. Proper watering will have a direct effect on plant growth, reduce disease incidence and improve resilience.
  • Transplanting: technique of moving seedlings. Proper timing is crucial to promote success. Includes acclimatization and minimizing root disturbance.
  • Fertilization: nutrients to aid plant growth, use organics first for soil improvement
  • Weeding: remove weeds to reduce competition for water and nutrients.
  • Root Pruning: trim roots to create more fibrous roots.
  • Hardening-off: transition seedlings to outdoor conditions. Gradually reduce watering and shade.
  • Nursery Hygiene: practices to keep the nursery clean and reduce disease spread (sanitation practices)
  • Shade and watering management needed for seedling support in the nursery as seedlings require different levels of shade during various growth stages.

Nursery Diseases and Pest Control (including IPM)

  • Damping off (fungal disease) is common. Prevention includes good drainage, airflow, and reduced watering when needed.
  • IPM (Integrated Pest Management): strategy involving multiple control methods to tackle nursery threats. The approach addresses pests and diseases by examining the host-pest-environment relationship. This approach avoids reliance on any one specific technique to control pests as other factors might limit their use

Record Keeping in the Nursery

  • Maintain records to verify clean inputs, worker compliance, production process traceability.
  • Logs should include: collectors, species, collection locations/sources, propagule types, conditions, storage conditions, treatments, batches, individual plants, test results, and procedures. Data should be clearly documented and include dates, times, and worker initials. Nursery workers must be well-trained on the record-keeping systems.

Nursery Cost and Financial Plan

  • Nursery programs must break even (self-sufficient).
  • Revenues should cover all costs. Use a 3-year financial plan.
  • Important considerations include financial management, projections on cost/profit, funding strategies

Tools and Equipment

  • Nursery establishment requires various tools and equipment, including hoes, spades, watering cans, hose, wheelbarrow, polythene tubes, shading material, pegs, etc. The tools and equipment should be procured upfront to support nursery operations.

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