touch & smell test
- Rub small quantity of dry soil on palm to feel its texture.
- Moisten the soil and rub again.
- Soil that feels course when dry but sticky when wet contains lumps of clay.
- Soil that feels course when dry but gritty when wet contains sand.
- Soil that feels course when dry but little gritty when wet contains silt.
- If the wet soil gives off musty smell then it contains organic matter.
