Maize is sown by the farmers in the rainy season.
Explanation:
Passive voice is a grammatical voice construction which is not only found in English language but is found in many other languages also. In the passive voice, the main focus is on the action or the verb and the object of the sentence and not on the subject.
The clause with the passive voice , the subject shows and expresses the same theme, the theme does not change by changing the sentence in the passive voice.