Question

Which of the following concentrated organic manure has the highest percentage of \(P_2O_5\)?

• A. Neem cake
• B. Raw bone meal
• C. Poultry manure
• D. Sheep manure

Hint:

Raw bonemeal is a concentrated source of phosphorus (P2O5), making it an excellent supplement for promoting root growth and flower development.

Answer 1

The Correct Option is B

To determine which concentrated organic manure contains the highest percentage of P₂O₅, we compare the phosphorus content typically found in each option:

Manure Type	P2O5 Content (%)
Neem Cake	1-2
Raw Bone Meal	20-25
Poultry Manure	3-5
Sheep Manure	1-2

Among these, raw bone meal has the highest phosphorus content, primarily due to it being derived from animal bones high in phosphorus compounds. Consequently, the concentrated organic manure with the highest percentage of P₂O₅ is Raw Bone Meal.

Answer 2

The correct answer is (B) Raw bone-meal.

Raw bone-meal is a highly concentrated organic manure that contains a high percentage of phosphorus (P₂O₅). It is derived from crushed animal bones and is known for its high phosphorus content, which promotes root development and flowering in plants.

Let's break down the other options:

(A) Neem cake: Neem cake is an organic manure that is rich in nitrogen, potassium, and micronutrients but does not have as high a phosphorus content as bone-meal.

(C) Poultry manure: Poultry manure is rich in nitrogen and contains phosphorus, but its phosphorus content is lower than that of raw bone-meal.

(D) Fish manure: Fish manure is a good source of nitrogen, phosphorus, and trace elements, but its phosphorus content is still not as high as raw bone-meal.

Thus, Raw bone-meal (Option B) has the highest percentage of P₂O₅ among the listed options.