The soil matters more than the grass on top of it

Clay content sets the ceiling on what a curator can produce, and no amount of rolling or watering escapes it.

Everyone stands around the pitch on the morning of a match and talks about the grass. How much is left on it, whether the colour means seam or bounce, whether it will hold together. It is the visible layer and it is the least important thing there.

What decides how a surface behaves over five days is the clay content of the soil underneath, and specifically the proportion of very fine particles that shrink as they dry. A high clay soil binds hard when rolled and holds its shape, so the bounce stays consistent and the pitch survives a long match. It also cracks as it dries, and cracks are where a surface stops being a surface and becomes a set of separate plates that behave differently depending on where the seam lands.

A lower clay soil with more silt and sand does something else. It never binds as hard, so the surface loosens under bowlers' footmarks and the ball begins to sit up or skid depending on how much moisture is left. Slower, lower, and generally less interesting after the first day.

This is why the same curator with the same roller and the same watering schedule produces one kind of cricket at one ground and a different kind twenty miles away. He can change the moisture. He can change the grass. He cannot change the particle size distribution under his feet without importing soil and waiting a couple of seasons for it to consolidate, and that is a construction project rather than a preparation decision.

Which is why I find the annual outrage cycle about doctored pitches slightly silly. Curators get blamed for producing a raging turner as if they had chosen it, when in a great many cases the soil was always going to break up on day three and the only lever available was whether it broke on day two instead.

What I would like is disclosure. Publish the soil profile of every international venue. Clay percentage, source, when it was last relaid. It is not secret, it is not controversial, and it would move the conversation from suspicion to information within one season.

Then when a pitch misbehaves, we could argue about it with a number in front of us instead of a suspicion about somebody's motives.