There are several reasons why your bed can feel sandy, including food crumbs, dust, hair formation, and dirt. Keeping your bedding clean will help keep the sandy texture at bay.
Make your bed regularly. You should shake off your bedsheets, blankets, and pillows on a daily basis. This will help get rid of the accumulated dirt and dust that is causing the sandy texture to your bed.
Regularly vacuum your bed, too. This will also help get rid of the accumulated dust and dirt that is causing the sandy texture to your mattress.
Line dry your sheets outside if possible. This will prevent them from shrinking, which makes them feel scratchy.
If you don't have the time to line dry your sheets, you can place them in the dryer on the lowest setting. This will still get them to a nice softness.
If your sheets are stiff, you can try soaking them in a mixture of baking soda and vinegar for one wash cycle. This will remove the hardness from your sheets, making them soft and smooth.
When you add carbon-rich materials to vegetable garden soil, such as compost or animal manures, you'll experience a Nitrate Depletion Period. This is when soil bacteria multiply to assimilate the new carbon food source, sucking up soil nitrates, which your plants need for growth.