Also - Surely. The mode in which the Feast of Tabernacles is here reintroduced, after the mention of it in Leviticus 23:34-36, may suggest that this passage originally formed a distinct document.
The fruit of the land - i. e. the produce, including the grain, the olives, the vintage and the fruits of all kinds. The time of year so indicated would answer in the holy land to the beginning of October. See Exodus 23:16 note.