Loamy soil best for growing crops because it has the most wanted chemicals and other things which help the plant to grow properly such as
growing plants
growing crops etc
by seeing this we can say it is best for growing crops and not only crops in loamy soil we can grow plant and trees 
Loamy soil is best for growing crops because:-
1) it  contains all minerals needed by the plants to grow.
2)it is the mixture of sandy and clayey soil so, it have proper water holding capacity(not too high and not too low)
3) it also contains humus in it with act as a natural fertilizer for the plants
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