Step 1: Understanding the Concept:
The objective is to identify the option that represents a solution or an enhancement to agricultural practices, as opposed to a factor contributing to low productivity. This determination should be based on general agricultural knowledge and the provided context.
Step 3: Detailed Explanation:
\[\begin{array}{rl} \bullet & \text{(A) Lack of credit facilities: This is a significant socioeconomic barrier for farmers, hindering investment in superior inputs and consequently leading to reduced productivity.} \\ \bullet & \text{(B) Reclamation of degraded lands: "Reclamation" signifies the process of recovering or restoring unproductive land. This is an action aimed at boosting productivity, not a cause of its decline.} \\ \bullet & \text{(C) Uncertain monsoons and lack of irrigational facilities: This is a critical physical determinant, as highlighted in the passage (assured water supplies were integral to the Green Revolution strategy), resulting in unpredictable yields and diminished productivity.} \\ \bullet & \text{(D) Small land holdings: The passage notes that "Ninety percent of the farmers in India are marginal farmer with low land holdings." Limited land size impedes mechanization and the achievement of economies of scale, thereby contributing to lower productivity.} \\ \end{array}\]
Step 4: Final Answer:
Reclamation of degraded lands constitutes a strategy for augmenting productivity, rather than an element responsible for low productivity.