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Animal nutrition - Quiz questions

20 important questions on Animal nutrition - Quiz questions

Which nitrogen-forms are considered reactive nitrogen (Nr) compounds?

Ammonia (Nh4)
Nitrous oxide (N2O)
Nitrate (NO3- )

What group of plants, in association with bacteria, can turn N2 into Nr compounds?

Legumes

What is the main source of nitrogen for synthetic fertilizers?

The main source of nitrogen for synthetic fertilizers is atmospheric di-nitrogen (N2). To create synthetic fertilizers, N2 and H2 (originally from coal gasification, and later from natural gas) are combined for large-scale production of ammonia (NH3), which can be used as fertilizer or be further processed into nitric acid and ammonium nitrate.

Which of the following environmental problems are caused by Nr?

Water poluttion
Climate change
biodiversity loss

What is currently the world's main source of phosphorus fertilizers?

Phosphate rock

Is the following statement true or false?
“As holds for nitrogen and phosphorus, excessive application of potassium leads to major environmental concerns”.

The statement is false. Unlike nitrogen and phosphorus, potassium does not lead to major pollution concerns. Potassium is not typically limiting in either freshwater or marine ecosystems, and is only a minor fraction of atmospheric particulate matter levels. Similarly, there has recently been less attention to future K supply given the availability of substantial mineral K reserves.

Which region has the highest use of mineral fertilizers per hectare of arable land (N + P2O5 + K)?

The region with the highest use of mineral fertilizers per hectare of arable land is East Asia. One reason for this is that manure is often discharged into surface water, and not used to fertilize crop land.

The nutrient use efficiency (NUE) is:

the percentage of input nutrient that reaches the intended product. The nutrient use efficiency is the percentage of input nutrient that reaches the intended product, e.g. a food product. A high NUE indicates that there are few losses to the environment (few N2O volatilization, leaching, etc.) and most of the nutrient inputs being absorbed by the plants. This is good for the environment and for the farmers' profits. NUE, therefore, is also used as a measure to estimate the environmental impact of the production of a food product (and not of a nutrient).

The sustainability of producing mineral nitrogen fertilizer is presently under threat because of:

Its high energy requirements. In principle, the amount of N2 in the atmosphere is so large that it provides a virtually unlimited reserve from which to manufacture nitrogen mineral fertilizer. Splitting the triple bond of the N2 molecule, however, is energy intensive, and currently this still depends mainly on fossil energy. Future availability of mineral nitrogen fertilizer, therefore, also requires a transition to renewable energy sources.

A) Like nitrogen fertilizer, phosphorus fertilizer can be produced industrially.
c) Egypt is the country that controls the largest reserves of phosphate in the world.
b) Phosphorus for agricultural use is declining.
d) Most of the phosphorus in food consumed by humans leaves the body in urine and faeces.

False, false, true, true

_ phosphorus losses is energy and economically efficient than ________.

Preventing – more – recycling

3. Select the correct statements.
[1] The current food production and consumption system is extremely inefficient with respect to phosphorus use.
[2] Manure run-off to waterways can be considered as a “permanent loss”, while residual fertilizer staying in the soil and available for subsequent crop campaigns is a “temporary loss”.
[3] Not all phosphorus losses in the food system are avoidable.

d) All are correct.

Which alternative will NOT help to achieve a better phosphorus security?
a) Increase number of people fed per tonne of phosphorus.
b)Reduce dependency on phosphorus imports.
c) Increase phosphorus accumulation in agricultural soils.
d) Recycle phosphorus from waste.

Select the correct alternative regarding sustainable phosphorus measures.
Reducing food spoilage during food processing, increasing phosphorus uptake by crop roots, and reducing the high consumption of animal-source foods in developed countries, are all considered

A) supply measures
B) demand measures

C) The fertilizer production process is very efficient as for each tonne of processed phosphoric acid, one tonne of phosphogypsum (by-product of phosphoric acid) is produced.
a) Within the phosphorus mining sector, the main phosphorus losses occur via the concentration process (iron phosphate and other contaminants are removed) and via spillages during storage and transport.
b) Trading phosphorus from the Western Sahara’s phosphate rock reserves with Moroccan authorities is allowed by the United Nations.

d) In the last two decades, the fertilizer industry has asssisted farmers with their phosphorus use.

False, true, false, true

Non-ruminants, such as pigs and poultry, cannot readily absorb the phosphorus in feed, therefore mineral phosphorus supplements are added to their diets. Much of this phosphorus is excreted via manure. Which of the following describes an alternative to reduce the phosphorus use and losses in non-ruminant diets?
a. Diets supllemented with enzyme phythase
b. Recycling phosphorus from manure
c. Providing phythate dissolved in water and not in the feed
d. Use soil conservation practices to avoid soild wind erosion.

How can you contribute to increase phosphorus efficiency in the food chain (multiple answers possible)?
a) Have a balanced healthy diet.
b) Consume a moderate amount of animal-source food.
c) Improve food planning to reduce food wastage.

All of the above

How many grams of phosphorus does a person produce per day through excreta?

1 - 1.5 g.

Capturing urine, and feces and grey water at _____ can in some instances be much _energy-efficient and cost-effective than removing phosphorus at because _______.

toilets – more – waste water plants - extensive and costly sewage infrastructure is avoided.

In the movie “Soil Farmers”, one of the farmers mentions that there is a problem in the way how most dairy farmers house their animals. Which problem is he referring to?

Difficulties with regards to manure collection.

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The role of livestock in future food systems

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Animal nutrition - Quiz questions

20 important questions on Animal nutrition - Quiz questions

Which nitrogen-forms are considered reactive nitrogen (Nr) compounds?

What group of plants, in association with bacteria, can turn N2 into Nr compounds?

What is the main source of nitrogen for synthetic fertilizers?

Which of the following environmental problems are caused by Nr?

What is currently the world's main source of phosphorus fertilizers?

Is the following statement true or false?“As holds for nitrogen and phosphorus, excessive application of potassium leads to major environmental concerns”.

Which region has the highest use of mineral fertilizers per hectare of arable land (N + P2O5 + K)?

The nutrient use efficiency (NUE) is:

The sustainability of producing mineral nitrogen fertilizer is presently under threat because of:

_______ phosphorus losses is ______ energy and economically efficient than ____________.

Which alternative will NOT help to achieve a better phosphorus security?a) Increase number of people fed per tonne of phosphorus. b)Reduce dependency on phosphorus imports. c) Increase phosphorus accumulation in agricultural soils. d) Recycle phosphorus from waste.

Select the correct alternative regarding sustainable phosphorus measures.Reducing food spoilage during food processing, increasing phosphorus uptake by crop roots, and reducing the high consumption of animal-source foods in developed countries, are all considered

How can you contribute to increase phosphorus efficiency in the food chain (multiple answers possible)?a) Have a balanced healthy diet.b) Consume a moderate amount of animal-source food.c) Improve food planning to reduce food wastage.

How many grams of phosphorus does a person produce per day through excreta?

Capturing urine, and feces and grey water at _________ can in some instances be much _________energy-efficient and cost-effective than removing phosphorus at ____________because _______________.

In the movie “Soil Farmers”, one of the farmers mentions that there is a problem in the way how most dairy farmers house their animals. Which problem is he referring to?

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