100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
HORT: Organic Gardening Final, Hort 3300 Final Exam Q&A 100% Pass $10.99
Add to cart
Quickly navigate to
Preview
  2.  
  3. HORT
  4.  
  5. HORT

Exam (elaborations)

HORT: Organic Gardening Final, Hort 3300 Final Exam Q&A 100% Pass
 0 purchase
  • Course
  • HORT
  • Institution
  • HORT

HORT: Organic Gardening Final, Hort 3300 Final Exam Q&A 100% Pass Define and describe the similarities and differences between the 'Law of the Minimum" and "Law of Return." Include the originators of these theories and explain where they fit into current gardening practices. Is one mutually ex...

[Show more]

Preview 4 out of 42  pages

Document information

  • October 22, 2024
  • 42
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

Written for

  • HORT
  • HORT

Seller

avatar-seller
JOSHCLAY

Reviews received

Content preview

©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

HORT: Organic Gardening Final, Hort

3300 Final Exam Q&A 100% Pass


Define and describe the similarities and differences between the 'Law of

the Minimum" and "Law of Return." Include the originators of these theories

and explain where they fit into current gardening practices. Is one mutually

exclusive of the other - ✔✔-The law of minimum is a theory by Justus Von

Liebig. The theory states that the soil must contain all the components it

needs to produce good plant growth and if it doesn't have all the elements

then the plant will reach a certain growth and not exceed it

-Law of return is a theory by Sir Albert Howard. This theory focused on

more than just the nutrients in the soil but the soil as a system. The idea is

that you grown the plants and keep what you want and decompose the rest

of the plant that is not used that contains good nutrients back into the soil.

-In current agriculture practices: the reason we add fertilizer and compost

today

,©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

-The laws are mutually exclusive, because plant residues returned to the

soil are a source of nutrients

-These two theories are the reasons we add fertilizer and compost to our

soil today



***what are the similarities and differences?

Law of the minimum states that growth is controlled not by the total amount

of resources available, but by the scarcest resources. Justus Von Liebig-

believed plants find nutrients only in inorganic substances- devalued

importance of humus; lacks reference to soil

Law of return (albert howard-founder/pioneer of organic movement): put

back in the soil what you take out the recycling of all organic waste

materials back to farmland.

Doesnt disagree with Law of Minimum- believes in composting

Plants produce die and nutrients return to soil

Closed System

The law of the minimum and the law of return are NOT mutually exclusive

(modern view: law of minimum is true but only part of the puzzle; law of

return is a gardening practice for organics)

,©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

Describe the overall processes a complex nitrogen source, like feather

meal, must go through in the soil to reach the point at which the plant will

take it up. What is the "final" form of N that is most commonly taken up by

the plant? List two soil environmental conditions that must exist for this to

happen. - ✔✔-Nitrogen must be converted from organic form to inorganic

form, and this is done through the microbial activity in two steps:

ammonification and mineralization

--Ammonification is the conversion of organic nitrogen (N) in soil organic

matter (like feather meal) to ammonium (NH4-)

--Nitrification then occurs, which is where the ammonium is rapidly

converted by a microbe to nitrate (NO3-). This is the final form that the

plant takes up

***Soil environmental conditions necessary:

-Oxygen must be present for microbes to live

-Temp must be between 77-95 F for mineralization to occur

What is the typical percentage of organic matter (OM) in the soil? List and

describe the components of OM? What component does not continue to

break down? What are two (20 garden practices that increase OM? What

are two practices that deplete OM? (Explain how/what these practices

, ©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

actual do to effect OM, not just that they decrease or increase....i.e. provide

a scientific explanation) - ✔✔• Typical percentage of OM in the soil is

between 3% and 5% (this is what you aim for)

• Components

i. Dead Plants

ii. Animal and microbial waste products

iii. Humus

1. Humus is the result of dead plants and animal waste broken down into

matter that is amorphous

2. Term coined in the late 1700s

3. Influences bulk density, contributes to moisture and nutrient retention

4. Humus is the component that does not break down further

b. Increase

. Add compost

1. The materials going through decomposition will release OM)

i. Grow cover crops and then till into soil

1. The plant material tilled into the soil will break down into OM)

c. Decrease

. Erosion

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller JOSHCLAY. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $10.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

69252 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling
$10.99
  • (0)
Add to cart
Added