4. Why did Britain and Russia become involved in a "Great Game" in Central Asia?

Following the Treaty of Turkmenchay 1828 and the Treaty of Adrianople (1829), Britain feared that Persia and the Ottoman Empire (now Turkey, etc.) would become protectorates of Russia. This would change Britain's perception of the world, and its response was The Great Game.

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.