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Option 4 : Clay
The correct answer is Clay.
- Clay soil particles are the finest in their size.
- Clay soils feel very sticky and roll like plasticine when wet.
- They can hold total water than most other soil types and, although only about half of this is available to plants, crops seldom suffer from drought.
- They swell when wet and shrink when dried, so a certain amount of restructuring can take place in these soils depending on weather conditions.
- They lie wet in winter and so stock should be taken off the land to avoid poaching (the compaction of soils by animals’ hooves).
- They are very late warming up in the spring because water heats up more slowly than mineral matter.
- They are normally fairly rich in potash but are deficient in phosphates.
- Clay soils usually need large infrequent dressings of lime.
- Sand is a granular material composed of finely divided rock and mineral particles. Sand has various compositions but is defined by its grain size.
- Sand, soil, or mud that collects at the sides or on the bottom of a river.
- Pebble is a smooth round stone that is found in or near water.
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