The correct answer of Early seeding, Flowering and Pod formation. Explanation:Early seeding, Flowering and pod filling stages are most critical stages at which moisture stress severely damages crop yield. Soya bean should be irrigated immediately after sowing. Soybean is very sensitive to excess moisture and the crop is affected, if water stagnates in the fields. During kharif season, soybean crop generally does not require any irrigation. However, if there is a long spell of drought irrigations are found beneficial. Check basin or border strip method is most popularly used for irrigating soybean. ?Additional Information Critical stages of Irrigation:RiceInitial tillering, floweringWheatMost critical stage: Crown root initiation, Tillering,jointing, booting, flowering, milk and dough stagesPulsesFlowering and podding. PeasPre bloom stage. BerseemAfter each cutting. GramPre flowering and flowering. Pigeon peaFlower initiation, pod filling. SorghumInitial seedling, pre flowering, flowering, grain formation. BarleyBoot stage, dough stageMaizeEarly vegetative, taselling and silking stage.