• Crop Water vs. Field Irrigation Requirements:
• Statement (I): Water requirement of the crops is lesser than the field irrigation requirement. $\implies$ Correct.
• Water Requirement ($WR$) represents the total consumptive use plus leaching/nursery needs. Field Irrigation Requirement ($FIR = WR - ER - S$) accounts for field application losses (conveyance, deep percolation, runoff);
• Because of application efficiency $\eta_a \lt 100\%$, $FIR = \frac{NIR}{\eta_a}$, meaning field irrigation requirement is larger than net crop requirement.
• Statement (II): Field irrigation requirement does not include contribution from other sources except irrigation. $\implies$ Incorrect.
• Net irrigation requirement explicitly deducts contributions from effective rainfall ($P_e$) and groundwater contributions ($G_w$).
• Conclusion: Statement (I) is correct but Statement (II) is incorrect (Option 3).

Evaluating the Assertion and Reason concerning Potato other root crop:

The correct answer is Option 2: Both (A) and (R) are true but (R) is NOT the correct explanation of (A)..

• Animal-Drawn Seed Drill Draft Specifications (IS 6813:2000):
• Draft Limit: According to Indian Standard IS 6813:2000 (Specification for Animal Drawn Seed-cum-Fertilizer Drill), the draft required to pull the seed drill under normal working conditions in well-prepared seedbeds shall not exceed 125 kgf (approx. 1225 N).
• Ergonomic Rationale: A typical pair of Indian working bullocks (average weight 350–400 kg each) can sustainably exert a continuous tractive effort of roughly $10\%$ to $12\%$ of their body weight over an 8-hour workday, corresponding to an optimal working draft of $70 - 120\text{ kgf}$. Setting the maximum limit at 125 kgf prevents excessive draught animal fatigue.
• Conclusion: 125 kgf (Option 2).

Correct option: (2) 125 kof