Which of the following programmes were implemented in India to... | Agrigyan

During the conversion period (first stage) of organic farming, foundational agronomic ecological practices must be established:
Enrichment of soil organic matter and microbial activity through compost, green manure, and crop residue (A).
Management of temperature and microclimate through mulching, shade management, and cover crops (C).

In measurement scales (Stevens, 1946):
A nominal scale categorizes data by labels/names without any natural order, magnitude, or distance. Thus (A) is TRUE.

• is FALSE: A meaningful absolute zero exists only in ratio scales, not nominal scales.
• is FALSE: Nominal scales represent discrete categories (e.g., gender, religion, blood group), not positive/negative numerical quantities.
• is FALSE: Nominal variables can have multiple categories (polytomous), e.g., marital status (single, married, widowed, divorced) or blood groups (A, B, AB, O).

Snowball sampling (chain-referral sampling) is a non-probability sampling method:
Benefits: It is effective for hidden, marginalized, or hard-to-reach populations where no sampling frame exists (A); it is widely utilized in exploratory and qualitative research (C); and it uncovers social networks and interpersonal connections (D).
Limitation: Because participants refer their acquaintances, it is prone to selection bias and is NOT always representative of the general population (B is false).