black grapes for wine in the douro valley, portugal

agriculture plantation vineyards dominated varieties vegetable evergreen portugal nacional touriga barroca produce grapes valley franca branch autumn citrus black douro grape tinta tinto roriz fruit plant berry field wine five food crop soil leaf farm agriculture autumn beautiful beauty black bunch countryside crop cultivated douro portugal river valley farming foliage fresh fruit grape grape-vine grapevine grow harvest healthy horticulture vineyard