Topics: Animal Nutrition, Animal Refresher

pH and Ammoniacal Nitrogen in Very Good Silage

In very good quality silage, the pH and ammoniacal nitrogen concentration are respectively:

pH = 4.2–4.5; Ammoniacal N₂ = 10–15%
pH = 3.5–4.2; Ammoniacal N₂ < 10%
pH above 4.8; Ammoniacal N₂ = 20%
pH = 3.0–3.5; Ammoniacal N₂ < 5%

pH and Ammoniacal Nitrogen in Very Good Silage

In very good quality silage, the pH and ammoniacal nitrogen concentration are respectively:

Options

pH = 4.2–4.5; Ammoniacal N₂ = 10–15%
pH = 3.5–4.2; Ammoniacal N₂ < 10% ✓
pH above 4.8; Ammoniacal N₂ = 20%
pH = 3.0–3.5; Ammoniacal N₂ < 5%

Correct Answer: B

Explanation in English

Correct Answer: pH = 3.5–4.2; Ammoniacal N₂ < 10%

Silage quality classification based on pH and ammoniacal nitrogen:

Quality	pH	Ammoniacal N₂	Butyric acid
Very good	3.5–4.2	<10%	Nil
Good	4.2–4.5	10–15%	Trace
Fair	>4.8	20%+	Some

Silage Quality Notes

Low pH (acidic) = high lactic acid = good fermentation = good quality
High ammoniacal N₂ = excessive protein degradation = poor quality (butyric acid fermentation)
Colour of good silage: Yellowish or brownish-green
Flieg-index is used to evaluate silage quality

📚 About this Topic — Animal Nutrition

This multiple choice question is from Animal Nutrition, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Nutrition to strengthen your preparation.

Share this Question

Anvi Classes

Related Questions