Well,

The addition of organic matter and the subsequent biochemical and/or biophysical processes have an important and influential role in changing soil tissue and soil alteration.

Regards

Top soil for agricultural purposes is possible.

Yes, it is possible by moving sand for example to clay soil or clay to sandy soil with significant amount, but it is not valuable economically on the level of small farms.

Yes!

Yes, alteration of soil texture only possible at small scale

Soil texture alteration is possible but it’s a long process.

Yes it is long process and costly

Yes, it is possible in some cases at a particular site by adding significant quantities of differently textured soil to what is already in place.

It is possible at small scale only

Theoretically it was possible to alter the top soil texture but economically not feasible.

Hi,

Yes it is indeed possible. However, the purpose and the economical aspects need to be considered before one aspires to do so. Don't we create artificial farms, gardens, beaches, and tennis courts? The clay/soil is altered and filled up in these structures.

The particle size of silt and clay are more finer than sand and these finer particles may be washed away by flooding repeatedly that ultimately results a sandy soil and could change the soil texture. Besides, naturally, always changing of rate weathering of parent rock is taking place that also causes texture of the soil.