Question

two difference between alluvial soil and desert soil​

Answer 1

Alluvial soil: this soil is wet.
Crops grow well in this soil.
This type of soil is located in Ganga Brahmaputra region.
Desert soil: This type of soil is dry and it is not suitable for the growth of crops.
This type of soil is found in deserts and dry areas.

Answer 2

Alluvium is mineral detritus transported and laid down by stream action. An “alluvial soil” would be the weathered result. An alluvial soil is a soil formed in alluvium. Usually, that would mean along a stream course. Such soils are likely to be well watered and fertile - that’s why farm land along valley bottoms is highly desireable. But alluvium cab also compose much of the bulk of a soil in a desert as well. Deserts are often strongly shaped by “mass wasting” such as flash floods and land slides. The floods are basically short term streams and the material they lay down would be alluvium.

A desert is a region that receives less than 25 centimeters of precipitation a year. So you can have deserts anywhere that the rain and snow fall are scant enough. A desert soil would be a soil in a desert. But since deserts can occur almost anywhere on the planet where topography and atmospheric circulation limit precipitation there is no common kind. The chief characteristic is that it forms in dry condidtions, is mainly mineral detritus by bulk, and lacks any significant humus (an “O” horizon).