(Super)natural provision

In the book of Joshua we read the following:

While the Israelites camped at Gilgal on the plains of Jericho, they kept the Passover on the evening of the fourteenth day of the month. The day after Passover they ate unleavened bread and roasted grain from the produce of the land. And the day after they ate from the produce of the land, the manna ceased. Since there was no more manna for the Israelites, they ate from the crops of the land of Canaan that year.

–Joshua 5:10-12, HCSB

The Israelites went from eating bread from heaven to eating grain from the earth (that would eventually be cultivated by the sweat of their brow). Was Yahweh any less of a provider for His people on the twentieth day of that month than He had been on the tenth?