Question

А A few healthy gram seeds are placed in each of the three pots X, Y and 2 containing same type of soil. The soil in pot X is mixed with some green leaves. The soil in pot Ys mixed with old cow dung while soil of pot Z is mixed with urea. Pots are watered regularly and given proper environment for plant growth Which of the following will be observed after 10 days?
a) Lot of growth in 2 with replenishment of all the nutrients.
b) Lot of growth in X without replenishment of any nutrient.
c) Lot of growth in Y with replenishment of the nutrients,
d) Both (a) and (c)​

Answer 1

Answer:

Explanation:

D is the answer

Answer 2

 The addition of old cow dung and urea in Pot Y and Z will promote and accelerate the plant growth more in comparison to the growth in Pot X because old cow dung and urea are manure and act as excellent fertilizers. [OPTION D - BOTH (a) and (c)]

ROLE OF NUTRIENTS IN PLANT GROWTH

Plant growth is determined by the presence of sunlight, water, temperature, and nutrients in the soil. Soil is enriched with the necessary nutrients by adding manure and fertilizers.

Cow dung

• It acts as an excellent fertilizer highly rich in organic matter.  
• It facilitates aeration in the soil particles and breaks compacted soil into simple absorbable form for the plant.
• It enriches the soil with nitrogen, phosphorus, ammonium, and potassium promoting the healthy growth of the crops.

Urea

• Urea is a widely used fertilizer due to the presence of high nitrogen.
• It promotes vegetative growth and makes the pH of the soil optimum for the plant.
• It also helps in improving roots and flowerings and provides resistance against environmental changes.