Descriptive terms commonly associated with certain ranges in soil pH are: 1  Extremely acid: < than 4.5; lemon=2.5; vinegar=3.0; stomach acid=2.0; soda=2â4. 2  Very strongly acid: 4.5â5.0; beer=4.5â5.0; tomatoes=4.5. 3  Strongly acid: 5.1â5.5; carrots=5.0; asparagus=5.5; boric acid=5.2; cabbage=5.3. 4  Moderately acid: 5.6â6.0; potatoes=5.6.
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For El Tovar, Bright Angel, Kachina, Thunderbird, and Maswick lodges, you can call 888-297-2757 or click here. For reservations at Yavapai Lodge, call 877-404-4611 or click here. For reservations at Grand Canyon Lodge, call 877-386-4383 or click here. No matter which of these properties you choose, book your room as early as possible. This is especially true if you plan on visiting during the summer or on a holiday weekend. Lodging in Grand Canyon for peak periods can fill up a year in advance.