Feed Proximate Analysis Quiz

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Questions and Answers

What does DM stand for in the context of feed analysis?

Dietary Minerals
Drying Method
Dry Matter (correct)
Digestible Material

How is nitrogen-free extracts (NFE) calculated in Proximate Analysis?

$NFE = 100 - ash% - crude fiber% - ether extract% - CP%$
$NFE = 100 - (ash% - crude fiber% - ether extract% - CP%)$
$NFE = 100- (ash%+crude fiber%+ether extract% +CP%)$ (correct)
$NFE = ash% + crude fiber% + ether extract% + CP%$

What is the main purpose of Proximate Analysis in feed analysis?

To assess the digestible carbohydrates in the feed
To determine the moisture content in the feed
To calculate the nitrogen-free extracts (NFE) in the feed
To partition compounds in a feed into six categories based on their chemical properties (correct)

How is the conversion from wet basis to dry matter basis calculated?

$[Nutrient] DMbasis = [Nutrient] AsIs / (%DM / 100)$ (B) Signup and view all the answers

What is the formula to convert from dry matter basis to wet basis?

$[Nutrient] AsIs = [Nutrient] DMbasis imes (%DM / 100)$ (A) Signup and view all the answers

What is the formula to determine nitrogen-free extracts (NFE) in Proximate Analysis?

NFE = 100 - (ash% + crude fiber% + ether extract% + crude protein%) (D) Signup and view all the answers

How is the percentage of dry matter (% DM) calculated in feed analysis?

% DM = (Dry Weight / Sample Weight) x 100% (A) Signup and view all the answers

What is the main purpose of determining ash content in feed analysis?

To estimate the inorganic residue from burning of organic matter (A) Signup and view all the answers

What does the abbreviation 'OM' stand for in the context of feed analysis?

Organic Material (B) Signup and view all the answers

What is the purpose of converting nutrient values from dry matter basis to as-is basis in feed analysis?

To compare nutrient levels of different feeds with varying moisture content (C) Signup and view all the answers

What is the main purpose of performing Proximate Analysis in feed analysis?

To partition compounds in the feed into six categories based on their chemical properties (C) Signup and view all the answers

What does the abbreviation 'OM' stand for in the context of feed analysis?

Organic material (B) Signup and view all the answers

How is the percentage of dry matter (% DM) calculated in feed analysis?

%DM = (Dry Weight / Sample Weight) x 100% (C) Signup and view all the answers

What is the formula to determine nitrogen-free extracts (NFE) in Proximate Analysis?

NFE = 100- (ash%+crude fiber%+ether extract% +CP%) (D) Signup and view all the answers

What is the purpose of converting nutrient values from dry matter basis to as-is basis in feed analysis?

To compare nutrient values across different levels of moisture in feeds (A) Signup and view all the answers

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Study Notes

Feed Analysis

DM stands for Dry Matter in the context of feed analysis.

Proximate Analysis

The main purpose of Proximate Analysis is to determine the nutritional composition of feed.
Proximate Analysis involves calculating the percentage of dry matter (% DM), crude protein, crude fat, crude fibre, and nitrogen-free extracts (NFE) in a feed sample.

Calculations in Proximate Analysis

The conversion from wet basis to dry matter basis is calculated by subtracting the moisture content from 100.
The formula to convert from dry matter basis to wet basis is: (dry matter value / 100) x (100 - % moisture).
The formula to determine nitrogen-free extracts (NFE) is: NFE = 100 - (% CP - % N x 6.25) - % CF - % CF - % Ash.
The percentage of dry matter (% DM) is calculated by subtracting the moisture content from 100.

Ash Content

The main purpose of determining ash content is to estimate the mineral content of a feed sample.

Abbreviations

OM stands for Organic Matter in the context of feed analysis.

Conversion of Nutrient Values

The purpose of converting nutrient values from dry matter basis to as-is basis is to express the nutrient values as they occur naturally in the feed sample.