To solve the food problem of the country,which among the following is necessary?

The major groups of activities for improving crop yields can be classified as:

Complete the crossword puzzle (Fig.).
Across
$1.$ Oil yielding plant $(9)$
$3.$ Crop grown in winter season $(4)$
$5.$ Fixed by Rhizobium $(8)$
$9.$ Common honey bee $(4)$
Downward
$2.$ Animal feed $(6)$
$4.$ $A$ micronutrient $(5)$
$6.$ Unwanted plant in crop fields $(4)$
$7.$ An exotic breed of chicken $(7)$
$8.$ Bottom feeders in fish pond $(7)$
$10.$ $A$ marine fish $(4)$

Preventive and control measures adopted for the storage of grains include

Find out the wrong statement from the following:

Mention two factors which affect food grains during storage.