"System of Rice Intensification" of cultivation, in which alternate wetting and drying of rice fields is practised, results in : 1. Reduced seed requirement 2. Reduced methane production 3. Reduced electricity consumption Select the correct answer using the code given below :

Defines SRI as a package that explicitly changes nursery management, time of transplanting, water and weed management — practices that determine planting density and therefore seed use.

A student can combine this with the basic fact that nursery/ transplanting methods and spacing set seed rate to hypothesize SRI could alter (reduce or increase) seed requirement and then seek specific SRI nursery/spacing recommendations.

Describes distinct rice cultivation systems (wetland vs upland) and that cultural practices vary by system, implying seed rates depend on system-specific practices.

Using a map or knowledge of where SRI is applied (typically in irrigated/wetland systems), a student could infer system-related practice changes might alter seed needs compared to conventional wetland methods.

Stresses that new/high‑yielding seeds need controlled irrigation and that timing/management (including irrigation) is decisive for crop performance — linking water management practices to crop management decisions.

Since AW&D is a different water-management regime, a student could reasonably investigate whether that change in water regime is associated with different recommended spacing or nursery practices that affect seed rate.

Notes that HYV seeds produce more grains per plant and changed cropping practices since the 1960s, indicating seed type and agronomic system influence seed-rate decisions.

A student could compare recommended seed rates for HYVs under conventional management versus SRI-modified practices to judge if SRI (with AW&D) tends to reduce seed requirement.

Explains that cropping systems (e.g., mixed cropping in rain-fed areas) alter what and how crops are sown, implying seed requirements vary with cropping practice.

By analogy, a student could treat SRI as another distinct cropping practice and look up how seed-rate recommendations differ between mixed/conventional systems and SRI systems.

Explicitly states SRI includes changes in water and weed management as part of altered agronomic practices.

A student can take this rule (SRI modifies water management) and combine it with standard knowledge about AWD (alternate wetting and drying) as a water-management approach to test effects on methane emissions.

Describes paddy fields as low-lying, typically flooded areas used for rice cultivation.

Knowing paddy fields are usually flooded, a student can compare continuous flooding (typical practice) with intermittent drying (AWD) to evaluate likely differences in processes that generate methane.

Notes that flat fields can be more easily flooded or irrigated by canals, implying flooding is a common irrigation method for rice.

A student can link the prevalence of deliberate flooding to a contrast with SRI's altered water regime and then seek external information on how flooded versus non‑flooded soil conditions affect greenhouse gas generation.

Discusses intensive and repeated irrigation for high‑yield rice varieties and the resulting lowering of groundwater tables.

From this pattern of heavy irrigation, a student can infer that practices reducing irrigation intensity (such as AWD under SRI) alter field water regimes and then investigate how such changes might influence methane formation/emission.

Emphasizes that rice has very high water requirement and that irrigation is central to its cultivation and productivity.

Using this, a student could frame comparisons between standard irrigated (often continuously flooded) systems and water‑saving SRI/AWD approaches to assess potential impacts on methane with reference to external knowledge about flooded vs non‑flooded soil biogeochemistry.