Question

The optimum seed rate of microsperma lentil is:

• A. 40-45 $kg/ha$
• B. 30-35 $kg/ha$
• C. 50-60 $kg/ha$
• D. 20-30 $kg/ha$

Hint:

Lentil types: Macrosperma = 40-45 $kg/ha$; Microsperma = 30-35 $kg/ha$. Always remember: Smaller seeds = Lower seed rate (by weight).

Answer 1

The Correct Option is B

Concept: Lentil (*Lens culinaris*) is broadly classified into two groups based on seed size: *macrosperma* (large-seeded) and *microsperma* (small-seeded). The seed rate varies significantly between these two types because a smaller seed size means more seeds per unit weight.

Step 1: Define the seed rate factors for Lentil.
Seed rate is determined by the target plant population, the 1000-grain weight (test weight), and the germination percentage. Since microsperma lentils have smaller seeds, they require a lower weight of seed to achieve the same number of plants per hectare compared to the macrosperma variety.

Step 2: Compare typical seed rates.
1. Macrosperma (Bold seeded): Usually requires 40-45 $kg/ha$ (Option 1).
2. Microsperma (Small seeded): The standard recommendation for maintaining an ideal population in rainfed or irrigated conditions is 30-35 $kg/ha$.

Step 3: Verify the optimum range.
For small-seeded lentils, a seed rate of 30-35 $kg/ha$ ensures a plant population that minimizes inter-plant competition while maximizing light interception and nutrient uptake.