HARVEST can be anything from corn to wheat to cabbage to apples. Harvest also to take as pending, i.e. not yet, but soon, harvest may be still on the fields and trees, etc. and that can give some very nice pictures.
Produce (agriculture). Have a look at farmers markets and see how nicely they arrange their produce, with mathematical precision almost. Can give some unconventional views.
Harvesting; the act of getting the produce from the fields from the trees out of the ground. I'm always impressed by those big machines used in agriculture.Themes.