65 ……… are obtained from stalks by threshing.
Grains (seeds) are obtained from stalks by threshing.
Threshing is a separating procedure based on the fact that the stalks of the crops and the chaff are soft materials, whilst the grains are extremely hard. Stalk and chaff can be split into pieces when beaten because they are soft, but the grains are unaffected.
Therefore, Grains (seeds) are obtained from stalks by threshing.