Question

Match List-I with List-II.

Theory proposed	Thinker/Name of Theory, etc.
(A) Root interception	(I) Bray, R.H. (1954)
(B) Law of diffusion	(II) Cate and Nelson (1965)
(C) Mobility concept	(III) Jenny and Overstreet (1939)
(D) Critical limit	(IV) Fick's (1885)

Choose the correct answer from the options given below:

• (A) - (III), (B) - (IV), (C) - (I), (D) - (II)
• (A) - (II), (B) - (I), (C) - (IV), (D) - (III)
• (A) - (III), (B) - (I), (C) - (IV), (D) - (II)
• (A) - (IV), (B) - (III), (C) - (II), (D) - (I)

Hint:

Recall which researcher is linked to each nutrient uptake mechanism.

Answer 1

The Correct Option is A

This match the following question pairs four soil fertility ideas with the researchers behind them, so let's take each row on its own.

1. Root interception: this is the theory that a root absorbs a nutrient by growing directly into contact with a soil particle and exchanging ions right there, first described by Jenny and Overstreet in 1939. Pairs with (III).
2. Law of diffusion: nutrients drift from where they are concentrated near a soil particle to where they are scarce near the root surface, following the diffusion law that Fick worked out, listed here as 1885. Pairs with (IV).
3. Mobility concept: this sorts soil nutrients by how freely they can travel to the root, an idea credited to Bray in 1954. Pairs with (I).
4. Critical limit: this is the soil test value marking the line between a crop responding to fertilizer and not responding, tied to the graphical splitting method Cate and Nelson published in 1965. Pairs with (II).

Lining up every pair gives root interception with Jenny and Overstreet, law of diffusion with Fick, mobility concept with Bray, and critical limit with Cate and Nelson.

Let's summarize:

• (A)-(III), (B)-(IV), (C)-(I), (D)-(II) is the correct set of pairs.
• Each pairing traces back to a specific, well known contribution in soil fertility and nutrient uptake research.

This matches option 1.