Given below are two statements, one is labeled as Assertion (A)... | Agrigyan

Assertion (A) is correct: Draining excess water from cold, waterlogged soils accelerates soil warming in spring, raising soil temperature by $2 - 5^\circ\text{C}$ and promoting earlier seed germination and root growth.
Reason (R) is correct and provides the exact thermodynamic explanation: Liquid water has an exceptionally high volumetric heat capacity ($C_w = 4.18\times 10^6\text{ J}\cdot\text{m}^{-3}\cdot\text{K}^{-1}$ or $1.0\text{ cal/cm}^3\cdot^\circ\text{C}$) compared to mineral soil solids ($C_s \approx 2.0\times 10^6\text{ J}\cdot\text{m}^{-3}\cdot\text{K}^{-1}$) and air ($C_a \approx 1.2\times 10^3\text{ J}\cdot\text{m}^{-3}\cdot\text{K}^{-1}$). By removing water and replacing it with air, drainage drastically lowers the overall volumetric heat capacity of the soil, requiring far less solar thermal energy to achieve the same temperature rise.