Crop Planning and Propagation Protocols

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Questions and Answers

What is the primary purpose of developing propagation protocols?

  • To create a visually appealing nursery layout
  • To achieve uniform crop development over time (correct)
  • To maximize the variety of species grown
  • To reduce space and labor requirements

Which growth phase requires a focus on establishing roots and plant support?

  • Rapid growth phase
  • Hardening phase
  • Establishment phase (correct)
  • Seed treatment phase

What should be kept as a record during crop planning?

  • Financial forecasts for nursery expansion
  • Daily logs and plant development records (correct)
  • Seasonal weather patterns
  • Customer feedback and complaints

Which of these is NOT a component of the key planning process?

<p>Schedule plot maintenance (D)</p> Signup and view all the answers

What is an important factor to consider when scheduling seed treatment?

<p>The target delivery date for finished plants (D)</p> Signup and view all the answers

What benefit does maintaining accurate records provide to nursery staff?

<p>Aids in replicating successful propagation methods (D)</p> Signup and view all the answers

Which factor is critical for the rapid growth phase of crops?

<p>Consistent environmental conditions (B)</p> Signup and view all the answers

What is the recommended depth for pouring gibberellic acid solution into an ice cube tray for seed preparation?

<p>Just enough to cover the seeds (D)</p> Signup and view all the answers

What key disadvantage is associated with vegetative propagation compared to seed propagation?

<p>Greater production costs (A)</p> Signup and view all the answers

What environmental condition does mulch help create around germinating seeds?

<p>Moist but not saturated environment (C)</p> Signup and view all the answers

Why is it suggested to use unbleached coffee filters for preparing seeds with gibberellic acid?

<p>They are easier to fold and contain seeds (A)</p> Signup and view all the answers

What is a significant factor to consider when using mulch for seed germination?

<p>It helps to minimize seeds being washed out (C)</p> Signup and view all the answers

Which action should be prioritized during the establishment phase of crop development?

<p>Maximize uniform germination (B)</p> Signup and view all the answers

What is an essential practice during the rapid growth phase?

<p>Maintaining optimal temperature (C)</p> Signup and view all the answers

During the hardening phase of crop development, what should be minimized?

<p>Moisture stress (A)</p> Signup and view all the answers

What is one way to protect seedlings from weather conditions during the establishment phase?

<p>Maintaining optimal temperature (B)</p> Signup and view all the answers

What is a recommended action to promote healthy root growth during the hardening phase?

<p>Induce moderate moisture stress (D)</p> Signup and view all the answers

Which of these practices is advised during the germination monitoring process?

<p>Scouting for pests and diseases (A)</p> Signup and view all the answers

What is the purpose of fortifying seedlings during the hardening phase?

<p>To prepare them for survival after out-planting (A)</p> Signup and view all the answers

Which of the following actions should be avoided during the establishment phase?

<p>Fertilizing heavily (D)</p> Signup and view all the answers

Which condition should be monitored as seedlings approach their target height during the rapid growth phase?

<p>The speed of root expansion (C)</p> Signup and view all the answers

What type of container is most suitable for plants with shallow, fibrous root systems?

<p>Shorter containers (D)</p> Signup and view all the answers

Which factor is NOT considered when choosing containers for plants?

<p>Seasonal changes (A)</p> Signup and view all the answers

For which type of plants are wider containers recommended?

<p>Plants with multiple fleshy roots (B)</p> Signup and view all the answers

Which type of container is designed for single use only?

<p>One-time-use containers (C)</p> Signup and view all the answers

Which of the following is a proper method to handle seeds when using acid?

<p>Stir seeds carefully in the acid bath (C)</p> Signup and view all the answers

What should be done to seeds after treatment with acid?

<p>Pour into a larger volume of cool water (D)</p> Signup and view all the answers

Which characteristic defines exchangeable cell containers?

<p>They hold multiple plants per cell (B)</p> Signup and view all the answers

Which cleaning step is essential for reusable containers?

<p>Thorough rinsing with fresh water (D)</p> Signup and view all the answers

What is the main benefit of using block containers?

<p>They contain many cavities for efficient planting (A)</p> Signup and view all the answers

Which type of container is best suited for plants with long taproots?

<p>Taller containers (A)</p> Signup and view all the answers

What is the primary function of growing media for young trees and shrubs?

<p>Providing physical stability (A)</p> Signup and view all the answers

Which type of growing medium is best for plants that require high water retention?

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

What characteristic of transplant media is necessary for smaller seedlings?

<p>It must contain compost (C)</p> Signup and view all the answers

What is a crucial requirement for seed propagation media?

<p>Sterility and fine texture (B)</p> Signup and view all the answers

Which growing medium component is specifically used to improve drainage?

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

What is an important characteristic of ideal growing media?

<p>Balanced air and water retention (A)</p> Signup and view all the answers

What is a key purpose of hardening in plant development?

<p>Strengthening plant structure (D)</p> Signup and view all the answers

What is the role of misting in rooting cuttings?

<p>To maintain moisture and prevent water logging (D)</p> Signup and view all the answers

Why should a growing medium for rooting cuttings be very porous?

<p>To allow for easy root growth and aeration (C)</p> Signup and view all the answers

What is typically used in compost preparation to measure its effectiveness?

<p>Temperature (B)</p> Signup and view all the answers

Flashcards

Seed Dormancy

The period when a seed is dormant can be influenced by environmental factors such as temperature and moisture. Understanding dormancy helps you choose appropriate treatments like scarification or stratification to help break it and ensure uniform germination.

Establishment Phase

The initial stage where plants establish their root systems and begin to grow above ground.

Rapid Growth Phase

The period when plants grow most rapidly, making leaves and branching out.

Hardening Phase

The final stage where plants harden and prepare for the next stage of their life cycle, whether that's flowering or going dormant.

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Growing Schedule

A detailed plan that outlines the steps of the growing process, from acquiring seeds or cuttings to delivery of finished plants.

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Propagation Protocols

Specific instructions for propagating plants, such as methods for taking cuttings or sowing seeds, including optimal conditions for success.

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Plant Development Records

Regularly recording observations about the plants, including daily activities and any changes in their growth.

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Growing media

A mix of materials, including soil, compost, and other ingredients, that provides the ideal environment for plant roots to grow.

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Wood fiber or bark based media

A type of growing media used for young trees and shrubs, providing stability and good drainage.

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Clay based media

A growing media that is good for plants with high water needs because it can hold water for longer.

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Perlite

A material added to growing media to improve drainage and prevent waterlogging.

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Seed propagation media

Sterile and fine-textured media used to start seeds and ensure they have enough moisture to germinate.

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Rooting cutting media

Very porous media used for rooting cuttings, allowing air to circulate and prevent waterlogging.

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Transplant media

Media that is typically coarser than seed or cutting media, used for transplanting seedlings or cuttings into larger containers.

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How to Protect Seedlings From Weather

Protecting seedlings from adverse weather conditions, particularly during the establishment phase, minimizing the risk of damage and promoting successful germination.

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Maintaining Optimal Temperature

Maintaining a consistent and optimal temperature for seedling growth, tailored to the specific plant species. This is crucial for both the establishment and rapid growth phases.

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Proper Irrigation

Watering seedlings to maintain a “moist, but not wet” environment, promoting healthy root growth without risking root rot. It's important throughout all three phases, adjusted based on the stage.

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Fertilization During Seedling Development

Controlling the amount and type of fertilizer used for seedlings. During the establishment phase, low or minimal fertilizer is preferred. During the rapid growth phase, fertilization increases to encourage growth. During the hardening phase, fertilizer decreases to prepare the plant for the outdoors.

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Managing Photoperiod and Light Exposure

Adjusting the light exposure and day length for seedlings to promote healthy growth and encourage blooming when appropriate. The hardening phase may involve gradual exposure to ambient light and temperature.

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Monitoring for Pests, Diseases, and Problems

Regularly monitoring the health of seedlings for signs of pests, diseases, or problems. This helps identify potential issues early and take appropriate action to protect the plants.

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Germination Stimulator

A substance like gibberellic acid that encourages seed germination.

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Seed Preparation

The process of preparing a seed for planting, often involving treatments like scarification or stratification, to break dormancy and promote germination.

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Seed Germination Container

The use of materials like coffee filters or ice cube trays to control the environment around germinating seeds.

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Seed Coverings (Mulch)

A layer of material placed on top of the soil to maintain moisture, control temperature, and prevent weed growth.

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Striking Cuttings

Propagating plants from cuttings, which are parts of the plant that can develop roots and grow into new plants.

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Shallow Root Systems & Containers

Containers with a shallow depth are suitable for plants that develop a dense, fibrous root system.

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Taproots & Tall Containers

Tall containers are ideal for plants with long taproots, such as fruit trees, as they provide enough space for the roots to grow deep.

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Fleshy Roots & Wide Containers

Wide containers are recommended for plants with multiple, thick, or fleshy roots, as they provide ample space for the roots to spread horizontally.

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One-time-use Containers

One-time-use containers are often made from materials like plastic, peat pots, or paper, and are typically discarded after a specific period or upon transplanting.

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Single, Free-standing Containers

Single, free-standing containers are individual pots or containers that are not part of a larger system. They are typically made of materials like plastic, ceramic, or metal.

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Exchangeable Cell Containers

Exchangeable cell containers are small, individual containers that can be placed in a tray or rack for efficient handling and management. These are often used for seed starting or propagation.

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Book or Sleeve Containers

Book or sleeve containers are typically made of flexible material, such as plastic or paper, and often have multiple compartments or cells stacked together.

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Block Containers

Block containers consist of many cavities or cells, usually made of rigid material like plastic or styrofoam, and are designed to grow multiple plants simultaneously.

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Acid Treatment for Seed Dormancy

Acid treatment helps break dormancy in some seeds. It involves soaking seeds in a solution of acid, often diluted sulfuric acid, for a specific period. This weakens the seed coat, allowing water and oxygen to penetrate.

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Seed Treatment Safety

Safety precautions must be taken when handling acid for seed treatment, including wearing protective gear, handling the acid carefully, and maintaining a safe temperature.

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Study Notes

Planning Crops and Propagation Protocols

  • Crop planning is essential for delivering high-quality plants on time
  • Key components include identifying seed dormancy, understanding growth phases (establishment, rapid growth, hardening), developing growing schedules, and maintaining records.
  • Daily logs and plant development records are crucial for successful replication of propagation protocols
  • Specific, species-specific knowledge about seed treatments, germination, needs, and development are important for protocols
  • Protocols benefit crop planning and scheduling, improve nursery productivity and seedling quality, provide information to clients and staff, and preserve propagation information.
  • Crop protocols should include target times and plan for the exact specification of the crop but it is recognized that they rarely conform precisely.

Key Planning Components

  • Determine available growing space
  • Plan crop layout based on plant numbers
  • Schedule seed treatment and plot planting
  • Schedule pot treatment
  • Determine a growing schedule to maintain the target delivery date.

Crop Growth Phases

  • Germination needs: different from mature plant.
  • Establishment: includes germination through emergence of true leaves, 14 to 21 days
  • Rapid Growth: energy shifts from roots to leaves, increase in size, 4-8 weeks to 20 weeks, varies by species
  • Hardening: seedlings are conditioned to endure stress and prepared for the environment, duration varies according to species, 1 month to 8 weeks

Propagation Environments

  • Understanding factors influencing plant growth is essential for high-quality container plants
  • Propagation involves modifying atmospheric conditions (temperature, light, relative humidity)
  • Photosynthesis and transpiration are essential processes: photosynthesis converts light energy to chemical energy (sugar production), transpiration leads to water loss through stomata

Growing Media

  • Growing medium (substrate) is a material other than soil in which plants are grown, ensuring optimal physical, chemical and biological properties are balanced
  • Growing media can contain peat, coir pith, wood fibers, bark, composted materials, and sometimes fertilizers, lime, or biological additives
  • Choosing the proper medium is crucial for plant growth, considering properties like water holding capacity, aeration, porosity, and swelling
  • Soil, if used, should be screened and sterilized to remove rocks and other debris
  • Compost, a good alternative to soil, can be made from many materials and is a good source of nutrients and a means to suppress pathogens.

Container Considerations

  • Container size is crucial; it affects water and nutrient availability, plant growth and operational aspects of a nursery.
  • Volume, height, diameter and shape are considered, along with species growing needs, and plant density
  • Large containers provide more water and nutrient availability for a longer time. But they are also heavier.
  • Proper container size can minimize the stress to the plants and minimize risks such as "transplant shock"

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