What's that smell?

My drive to and from work takes me past some fields. Last week the harvesters were out and while there was a fine mist of harvest dust over parts of the road it was accompanied by this incredibly sweet smell which made the drive home rather enjoyable.

This week, I've been driving past those fields in the baking sunshine and holding my breath because they've finished harvesting and laid down manure.

It's not surprising that today I was glad it was raining as I was driving back.