It is interesting to note that with the threat of conflict still a distinct possibility, Moroni takes time to "employ his men in . . . delivering their women and their children from famine" (Alma 53:7). These actions might imply the planting, cultivating or harvesting of crops.
According to John Sorenson, with remarkable consistency, the Nephite record reports a pattern of seasonality in Nephite warfare. Since wars in pretechnical societies are usually launched at opportune times of the year, the Nephite pattern of warfare tells us something about the seasons and their calendar. . . . When the seasons for cultivation and warring in Mesoamerica before the time of Columbus are studied, we see that the preparation and cultivation of farmlands and other domestic chores went on from about March through October, which constituted the rainy season. Wars began after the harvest and mainly went on during the hot, dry months, November through February. Of course, camping in the field was sensible at this time, and movement was least hampered by the swollen streams or boggy ground common in the other part of the year. [John L. Sorenson, "The Nephite Calendar," in Reexploring the Book of Mormon, pp. 173-174]
One should also note, however, that in parts of Mesoamerica, the length and timing of the "dry season" and the "wet season" vary substantially. [John L. Sorenson, "Comments on Nephite Chronology," in Journal of Book of Mormon Studies, Fall 1993, p. 209]