Question

Which of the following concentrated organic manure has the highest percentage of P2O5?

• 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

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.