These pictures portray how farmers harvest and threshold their crops.
The very accustomed way of harvesting/thresholding/separating crop yields from its grain is:
1. through using oxen, cattle, or some other rudimentary techniques
2. through using Combine Harvesters, which is highly mechanized and modernized.
From my field experience, I discovered the third and unusual technique whereby farmers use tractors not combine harvesters for the indicated purpose.
The following video clip shows the third technique I mentioned above.