Why does this part of my lawn look so bad? drought?

[exotion]

While I am waiting for the person who does soil analysis to be back next week, I did compare soil samples at the root area from the troubled area to a good area. The trouble area had sandy soil mixed with some tiny gravel, whereas the good area had loamy soil and also darker in color. Could this be the culprit?

If this is indeed the culprit, what would be some of the ways to improve soil condition that can be done with one person? Like dump more topsoil over the troubled area?

I am also curious

 

[seiyafan]

I took two soil samples each from the two areas to see if that can provide an answer. I am expecting the results to be available early next week.

 

[seiyafan]

Here's the result:

 

[exotion]

Here's the result:

<img src="http://www.lawnmowerforum.com/attachments/lawn-care-landscaping/27153-why-does-part-my-lawn-look-so-bad-drought-capture-png"/>

Need some good fertilizer with sulfur

 

[seiyafan]

Thanks! I will be putting down some milo soon.
Does anyone think the brown side could be due to sandy soil and drought condition. I am going to seed TTTF, hope they do a better job than KBG.