How did the rain affect lencho's fields?

 His fields will yield rich crops due to these raindrops

hope it helps :)

 The rain was not filled with water drops instead it was raining hail. Lencho compared it to the coins  , the big drops as 10centavo pieces while the small drops as 5centavo pieces. The hail storm ruined the fields the crops were damaged , the tress were laid bare nothing was left of there corns and beans.