Reading your soil before you buy seed

Rainfall figures describe what arrives. Soil decides how much of it a crop can actually use, and for how long. Two farms in the same district with the same rainfall can face very different drought pressure because one holds water and the other does not.

The hand test

Wet a handful of soil and work it between your fingers.

• Sandy: gritty, will not hold a shape, falls apart immediately. Drains fast, dries fast, holds little. Pearl millet and sesame do well here; maize struggles without reliable rain.
• Loam: slightly gritty but holds a shape that crumbles under light pressure. The most forgiving texture, and where most varieties perform close to their potential.
• Clay: sticky, smears, rolls into a ribbon without cracking. Holds a lot of water but releases it slowly and waterlogs. Rice tolerates it; groundnut resents it.

What this changes

On sandy soils, prioritise early maturity even more heavily than the rainfall figures suggest, because available water runs out sooner than the rain gauge implies. On clay-rich soils in high-rainfall zones, the binding constraint is usually drainage and disease rather than drought, so disease resistance should outrank drought rating.

Organic matter is the lever you control

Texture is fixed; organic matter is not. Returning residues, applying manure where it is available, and keeping the soil covered all raise water-holding capacity over several seasons. It is slow, unglamorous, and does more for drought resilience on a sandy field than any single seed choice.