Drought management

Explanation

Statement 1 is correct: agricultural drought is defined by inadequate soil moisture relative to crop water requirements during key growth periods. High temperatures increase evapotranspiration rates, so even moderate rainfall deficits can cause agricultural drought when crops are most sensitive — for example, during flowering and grain-filling phases for wheat and barley. The condition is physiologically determined, not solely by precipitation thresholds used to declare meteorological drought. Statement 2 is correct: the three drought types — meteorological, agricultural, and hydrological — have a recognised temporal sequence. Meteorological drought (precipitation deficit) manifests first; agricultural drought follows as topsoil moisture depletes; hydrological drought — affecting rivers, reservoirs, and groundwater — lags furthest, since groundwater recharge and surface storage respond slowly to precipitation anomalies. This is a well-established principle in hydrology and is why water management agencies track all three indices separately. Statement 3 is incorrect: agronomic science consistently shows that co-occurring heat stress and drought produce compound (often synergistic or multiplicative) effects on grain formation — not merely additive ones. High temperatures accelerate crop development, shorten the grain-filling period, and increase vapour pressure deficit, all of which are exacerbated by dry soils. The combined impact on yield is typically greater than what would be expected by adding the independent effects of heat stress alone and moisture deficit alone. England's 2026 experience — where successive heatwaves in May and June followed by an exceptionally dry July caused yields to fall sharply — illustrates this compound-stress dynamic.

Explanation

Crop-loan restructuring is a debt-relief instrument: state governments reschedule or waive outstanding agricultural loans so that farmers in drought-affected talukas are not burdened by immediate repayment obligations, freeing up liquidity for the next sowing cycle. Emergency water tankers are a direct water-supply relief measure deployed to provide drinking and agricultural water in areas where monsoon deficits have depleted local sources. Power concessions — typically reduced or waived electricity tariffs for agricultural pump sets — are an input-cost subsidy, not a water-supply measure. They reduce the cost of drawing groundwater but do not themselves supply water; conflating them with water tankers confuses two distinct categories of drought relief. Pairs 1 and 3 are therefore correctly matched; Pair 2 is not.

Explanation

In India's drought management framework, an official drought declaration for a district is not triggered by rainfall deficit alone. Competent authorities assess a combination of indicators — including the extent of crop sowing (whether kharif or rabi sowing has been possible), soil moisture conditions, and reservoir/water storage levels — before formally declaring drought. A rainfall shortfall is one input, not a standalone criterion. This is why regions such as western Rajasthan, despite recording a 30% monsoon deficit with near-total crop failure in some areas, may not receive an immediate official drought declaration: the process demands a composite assessment across agriculture, hydrology and livelihoods. Statement 1 is therefore incorrect — rainfall deficit alone does not constitute an official drought declaration. Statement 2 correctly captures the multi-indicator nature of the drought declaration process.