The two aren't precisely equivalent. To know whether or not you can replace shortening with oil in any given recipe, you may need to try it and see. As a starting point for your experiments, you should probably use approximately 1/4 less oil than the recipe calls for in shortening. Adjust this up or down depending on results.
Half a cup of butter.
Use the same amount
A half cup shortening is a half cup margarine. They are practically the same except in taste.
Yes, for one cup of shortening use one cup of butter.
1cup
There are 48 teaspoons in a pound of lard. This is based on the conversion that 1 pound equals 16 ounces, and there are 3 teaspoons in a tablespoon and 16 tablespoons in a cup. Therefore, 1 pound of lard contains 48 teaspoons.
There is really no such thing as vegetable lard. Lard refers to a fat coming from an animal. There is such thing as vegetable fats, like oil and shortening. Shortening is often called (incorrectly) vegetable lard because its look and consistency is similar to animal lard.
Shortening or lard could be substituted without any major change in the recipe.
Butter is one type of shortening. Use a cup of butter.
The cup of water is slightly heavier.
3 teaspoons in 1 tablespoon 8 tablespoons in 1 stick of butter. 3x8=24x2=48 48 teaspoons in 2 sticks. 2 sticks equals 1 cup.
1 cup of lard