You were advised to use elemental sulfur in the reclamation of a saline-sodic soil. Indicate how the sulfur helps bring about this reclamation
A) Sulfur helps maintain high salt content while reducing exchangeable Na+ levels
B) Sulfur stimulates the formation of gypsum in the soil
C) Sulfur is oxidized to sulfates that will precipitate much of the exchangeable Na+
D) Sulfur leaches down into the soil and increases the soil pH
E) Sulfur is oxidized and forms sulfuric acid which, in turn, removes the exchangeable Na+
E
You might also like to view...
By dividing the ____ rating of a lamp by the watts rating, a value called the efficacy of the lamp is determined.
A. volt B. lumen C. ampere D. color
Arial photos taken at certain intervals and controlled by base stations on the Earth’s surface are used to create:
a. Contour lines b. Cutting-plane lines c. Photogrammetric maps d. Detail drawings
Which of the following statements is accurate?
An ammonia synthesis process works as follows: Fresh feed air and hydrogen are combined with a recycle stream and the combined stream is compressed to 10 MPa. The compressed stream enters a reactor, and a fraction of the entering nitrogen and hydrogen are converted into ammonia. The reactor effluent, still at 10 MPa, enters a condenser. The liquid and vapor streams leaving the condenser are in VLE. The liquid stream, which is almost pure ammonia, is the product. A fraction of the vapor stream leaving the condenser is purged, while the rest is recycled.
Someone claims that a certain suspension contains at least seven particles per mL. You sample 1 mL of solution. Let X be the number of particles in the sample.
a. If the mean number of partides is exactly seven per mL (so that the claim is true, but just barely), what is P(X ? 1)? b. Based on the answer to part (a), if the suspension contains seven particles per mL, would one particle in a 1 mL sample be an unusually small number? c. If you counted one particle in the sample, would this be convincing evidence that the claim is false? Explain. d. If the mean number of particles is exactly 7 per mL, what is P(X ? 6)? e. Based on the answer to part (d), if the suspension contains seven particles per mL, would six particles in a 1 mL sample be an unusually small number? f. If you counted six particles in the sample, would this be convincing evidence that the claim is false? Explain.