Question:
Which of the following manure has the highest content of Nitrogen?
Which of the following manure has the highest content of Nitrogen?
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Organic Nitrogen values:
Blood meal: $10 - 14\%$
Mustard cake: $\approx 5\%$
Poultry litter: $2 - 4.5\%$
Cowdung: $< 1\%$
Blood meal: $10 - 14\%$
Mustard cake: $\approx 5\%$
Poultry litter: $2 - 4.5\%$
Cowdung: $< 1\%$
Updated On: Aug 7, 2026
- Cowdung
- Mustard cake
- Poultry litter
- Blood meal
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Organic manures are classified into bulky organic manures (like farmyard manure and compost) and concentrated organic manures (like oil cakes, bone meal, and blood meal).
Concentrated organic manures contain higher percentages of major plant nutrients (N, P, and K) than bulky organic manures.
Step 2: Detailed Explanation:
Let us compare the typical nitrogen ($N$) concentrations of the organic sources listed:
1. Cowdung: A bulky organic manure containing approximately $0.3\text{ to }0.5\%$ nitrogen on a fresh weight basis, along with low levels of phosphorus and potassium.
2. Mustard cake: A concentrated organic manure obtained as a byproduct of oil extraction from mustard seeds, containing about $4.8\text{ to }5.2\%$ nitrogen.
3. Poultry litter: An animal-derived bulky to concentrated manure containing approximately $2.0\text{ to }4.5\%$ nitrogen, depending on moisture levels and the proportion of litter material.
4. Blood meal: A concentrated organic manure made from dried animal blood collected at slaughterhouses.
It is a highly concentrated organic nitrogen source, containing approximately $10\text{ to }14\%$ nitrogen in a rapidly mineralizable form.
Due to this high concentration, blood meal is used to correct nitrogen deficiencies quickly in organic farming systems.
Step 3: Final Answer:
The manure with the highest nitrogen content is Blood meal, which corresponds to Option (D).
Organic manures are classified into bulky organic manures (like farmyard manure and compost) and concentrated organic manures (like oil cakes, bone meal, and blood meal).
Concentrated organic manures contain higher percentages of major plant nutrients (N, P, and K) than bulky organic manures.
Step 2: Detailed Explanation:
Let us compare the typical nitrogen ($N$) concentrations of the organic sources listed:
1. Cowdung: A bulky organic manure containing approximately $0.3\text{ to }0.5\%$ nitrogen on a fresh weight basis, along with low levels of phosphorus and potassium.
2. Mustard cake: A concentrated organic manure obtained as a byproduct of oil extraction from mustard seeds, containing about $4.8\text{ to }5.2\%$ nitrogen.
3. Poultry litter: An animal-derived bulky to concentrated manure containing approximately $2.0\text{ to }4.5\%$ nitrogen, depending on moisture levels and the proportion of litter material.
4. Blood meal: A concentrated organic manure made from dried animal blood collected at slaughterhouses.
It is a highly concentrated organic nitrogen source, containing approximately $10\text{ to }14\%$ nitrogen in a rapidly mineralizable form.
Due to this high concentration, blood meal is used to correct nitrogen deficiencies quickly in organic farming systems.
Step 3: Final Answer:
The manure with the highest nitrogen content is Blood meal, which corresponds to Option (D).
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