The ingredients in Brawndo include sucrose, citric acid, NaCl, sodium citrate, a
ID: 298579 • Letter: T
Question
The ingredients in Brawndo include sucrose, citric acid, NaCl, sodium citrate, and KH2PO4.
1. Which of the inorganic ions found in Brawndo would not retained in the soil by cation exchange?
2. Brawndo lacks an element important for plant growth – essential for synthesis of proteins and nucleic acids. This element is:
3. What could happen to the P in Brawndo if it were added to a crop field with soil with a pH of 8?
4. What could happen to the P in Brawndo if it were added to a soil with a pH of 4?
5. Sucrose, citric acid and citrate are all organic compounds. Which group of organisms would not be able to use these compounds as sources of C and energy?
6. One problem with using Brawndo was that the nutrients (salts) in Brawndo were too concentrated, and they were building up on the soil surface. How can the build-up of salts in soil affect crop growth?
7. In many cases the crops irrigated with Brawndo wilted. This is because the soil water potential was:
8. In the movie, Joe’s solution to the problem - using water to irrigate the crops - worked well. How?
Explanation / Answer
Answer:1
Sodium ion would not be retained in the soil, because it has low cation exchange capacity.
Answer:2
It lacks nitrogen, because it is one of the necessary element in the soil for the growth of plant.
Answer:3
As KH2PO4 is the basic in nature, therefore by interacting the pH value 8, it would become more basic in nature.
Answer:4
As KH2PO4 is the basic in nature, therefore by interacting the pH value 4, it would become acidic in nature.
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