Question

how dose storage grains losses occurs ?

Answer 1

during the storage of grains both biotic and abiotic factors cause losses to the grain

Answer 2

$\huge\mathfrak\color{blue}{Answer}$

Storage grain losses occur due to biotic and abiotic factors. The biotic factors are bacteria, fungi, mites, insects and rodents. The abiotic factors are moisture and temperature. All the above results in poor market value.