Seed Rate Requirement Ordering Explained

The seed rate is the amount of seed needed to plant a specific area. It varies based on the crop's seed size, germination capacity, and desired plant population density.

Understanding Crop Seed Rates

Here's a breakdown of the typical seed rate requirements for the given crops, ordered from highest to lowest:

• Wheat (B): Generally requires a high seed rate, typically ranging from 100 to 150 $\text{kg/ha}$ due to its seed size and planting density needs.
• Chickpea (D): Requires a substantial seed rate, usually between 70 and 100 $\text{kg/ha}$. Its seed size influences this requirement.
• Linseed (A): Needs a moderate seed rate, often around 40 to 60 $\text{kg/ha}$. The seeds are smaller than wheat and chickpea.
• Mustard (C): Typically has the lowest seed rate among these crops, usually 5 to 10 $\text{kg/ha}$ (for oilseed varieties), because its seeds are very small and planting density is managed accordingly.

Determining the Sequence

Based on these typical requirements, the order from highest seed rate to lowest is:

1. Wheat (B)
2. Chickpea (D)
3. Linseed (A)
4. Mustard (C)

Therefore, the correct sequence is B, D, A, C.