Problem Set #3, Question 3

Madeline, you are on the right track. For part b) be specific with respect to values for parameters such as ESP, pH and/or BS in your answer.
For part d) first consider the impact of dispersion on soil properties, then you can relate that to implications for plant growth

Thank you!

I was also wondering if, for question 4, you are looking for us to answer with the more general organism (ie; bacteria) or if the question is looking for a more specific answer (ie; cyanobacteria)?

Be as specific as you can

For the question 4 on PS 3 I put for a) cyanobacteria and b) Algae and I got 2/4 for the question, I was wondering which one was wrong, or are both?

Kelsey, you are correct for part b)
For a) consider a different N fixing organism that associates with legumes

Hi, I am just reviewing PS3, Q3 part a) I was wondering how pH would effect sodium levels?

pH is used in the differentiation of sodic soils; for a soil to be classified as sodic is has ESP > 15 AND pH >8.5
Recall Na is a base forming cation, and is very soluble relative to Ca, Mg, K salts thus the high pH (>8.5)