How can grass be turned into fertilizer after digestion?

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Discussion Overview

The discussion revolves around the process by which grass, after being digested by cows, is transformed into fertilizer. Participants explore the nutritional dynamics between cows and plants, questioning how nutrients are extracted and subsequently made available to plants through manure.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant questions how grass can be transformed into effective fertilizer after being digested by cows, suggesting that nutrients are lost in the process.
  • Another participant challenges the assumption that nutrients for cows are the same as those for plants, prompting a discussion about the energy sources for both organisms.
  • A participant suggests that the cow's digestion may concentrate nutrients in manure, making them more accessible to plants.
  • There is a claim that grass compost is often less effective than fertilizer, with some participants sharing personal experiences regarding its quality.
  • One participant emphasizes that the nutrients removed by the cow do not detract from what plants need, as plants obtain energy from sunlight and carbon from the air.

Areas of Agreement / Disagreement

Participants express differing views on the effectiveness of grass as fertilizer after digestion, with some questioning the nutrient transfer process and others defending the idea that manure provides usable nutrients for plants. The discussion remains unresolved, with multiple competing perspectives presented.

Contextual Notes

Some participants express uncertainty about the scientific aspects of the discussion, indicating a lack of formal background in the subject matter. There are also references to the nutrient cycle, but no consensus is reached on the specifics of nutrient transformation.

Who May Find This Useful

This discussion may be of interest to individuals involved in gardening, agriculture, or those curious about the interactions between animal digestion and plant nutrition.

matt the rat
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I don't understand how grass can enter an animal like a cow, have nutrients extracted by the cow and then be excremented as fertilizer? My point is that if i got the same grass, soaked in water and added it to plants without removing any nutrients it would be a useless fertilizer. How come you ca take the same grass that has been robbed of nutrition and the result is an excellent plant fertilizer? The cow cannot add nutrients of its own or it would e entually starve of the nutrient. Please explain.
 
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matt the rat said:
My point is that if i got the same grass, soaked in water and added it to plants without removing any nutrients it would be a useless fertilizer.
What about compost?

matt the rat said:
How come you ca take the same grass that has been robbed of nutrition and the result is an excellent plant fertilizer? The cow cannot add nutrients of its own or it would e entually starve of the nutrient. Please explain.
Why are you assuming that nutrients for cows are nutrients for plants? What is the source of energy for a cow? What is the source of energy for a plant?
 
because that's what cows eat? where else do they get their nutrition from? Please answer question to be helpful. Thankyou
 
grass compost is never as good as fertiliser, in my experience, and often has lots of dirt added
 
matt the rat said:
because that's what cows eat? where else do they get their nutrition from? Please answer question to be helpful. Thankyou
I want you to think about the question. This is what we do here at PF!

My point is that there is no reason to expect that a nutrient for a cow will be a nutrient for a plant, so it makes sense that the cow nutrient be transformed by the cow into something that becomes a nutrient for a plant.

And I will ask again the last question: what is the source of energy for a cow? What is the source of energy for a plant?
 
Sorry I am not a scientist in any way. I know I am seeing this in simplistic terms. Here is my best effort without research. The cow probably eats large volumes of plant material to produce some manure therefore it may be somewhat concentrated. Something occures in the cows internal organs that converts the plant material to a product that is more readily available to plants receiving manure. Any nutrients removed by the cow does not rob the plants as theydo not need those nutrients
 
matt the rat said:
Sorry I am not a scientist in any way.
Perhaps you could tell us a bit more about your background?
 
Back ground avid grower of chilli plants
 
  • #10
Asbestos tongue, eh?
 
  • #11
Yes bystander that does help
 
  • #12
Growing the worlds hotest chilli and othe varieties, chillies can be hard to grow, and eat.
 
  • #13
Plants get energy from the sun, carbon from the air, and nutrients from the soil. If the cow removes the energy and the carbon from the grass, whatever is left is still usable for a new plant, since plants don't get energy or carbon from fertilizer.
 

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