Ramban #1 (citing the Ibn Ezra): Having discussed the fruits of the mountains and hills in the previous Pasuk, the Torah now praise fruits of the plains and the valley.

Ramban #2: "Eretz u'Melo'ah" comes to inorporate a B'rachah on the people and the animals. ¹ similar to "Baruch P'ri Bitn'cha u'Feri Admasecha u'Ferei Behemt'cha". ²

Rashi and Targum Onkelos: It means that Yosef's land is blessed from the beginning of the ripening of the fruit of the mountains, which ripen before those of the other tribes. ¹

Targum Yonasan: Yosef's land is blessed from the first-fruit of the mountains, which the B'rachah of the original Avos, who are compared to mountains, bequeathed to him'.

Sifri: It means that the B'rachah comes from the blessing of the Avos, who are called 'Harim', and "mi'Meged Giv'os Olam", from the blessing of the Imahos, who are called 'Gevahos'. ²

Rashi and Targum Onkelos: It means that Yosef's land is also blessed on the hills that produce fruit continuously - and are not deterred by a lack of rain.

Targum Yonasan: 'And from the sweet fruits of the hills that they produce continuously, which the B'rachah of the original Imahos, who are compared to hills, bequeathed to him'.