The correct option is Use of chemical fertilisers and insecticides.
Explanation
Primitive Subsistence Farming is a traditional form of agriculture practiced on small patches of land. It is characterized by the use of indigenous tools and a total reliance on natural environmental conditions.
- Use of chemical fertilisers and insecticides is the correct answer: The use of chemical fertilisers and insecticides is a characteristic of modern commercial farming or intensive subsistence farming. Primitive subsistence farming relies entirely on the natural fertility of the soil (often replenished through slash-and-burn techniques) and does not utilize modern chemical inputs.
- Use of family/community labour is a characteristic: This farming system depends on the labour provided by family members or the community. It does not typically involve hired labour or heavy machinery.
- Dependence on monsoon is a characteristic: It is a rain-fed farming system that depends heavily on the monsoon and natural climatic conditions for crop growth, lacking artificial irrigation infrastructure.
- Land productivity is low is a characteristic: Due to the absence of modern inputs like high-yielding variety seeds, fertilisers, and irrigation, the land productivity is low.
Key Takeaway: Primitive Subsistence Farming (e.g., Jhumming or Slash and Burn) is defined by low technology usage, dependence on the monsoon and natural soil fertility, and the absence of modern agricultural inputs like chemical fertilisers.