https://wiki.ubc.ca/api.php?action=feedcontributions&feedformat=atom&user=YuediMa 2026-08-07T18:24:22Z User contributions MediaWiki 1.43.9 https://wiki.ubc.ca/index.php?title=Thread:Course_talk:APBI200/Final_Exam_Questions/reply_(35)&diff=296745 2014-04-22T21:44:52Z

<p>YuediMa: Reply to Final Exam Questions</p> <hr /> <div>Hi, Maja, I was wondering when do phosphate leaching become a problem?</div>

YuediMa https://wiki.ubc.ca/index.php?title=Thread:Course_talk:APBI200/General_Course_Questions/reply_(12)&diff=296622 2014-04-21T21:19:32Z

<p>YuediMa: Reply to General Course Questions</p> <hr /> <div>Hi, Maya. R the role in soil of mites and nematode just grazing on soil bacteria, and stimulate the nitrogen cycle? And does heterotrophic bacteria have any roles other than decompose organic matter?<br /> Thank you!</div>

YuediMa https://wiki.ubc.ca/index.php?title=User_talk:YuediMa&diff=296621 2014-04-21T21:15:54Z

<p>YuediMa: Talk page autocreated when first thread was posted</p> <hr /> <div></div>

YuediMa https://wiki.ubc.ca/index.php?title=Thread:User_talk:YuediMa/Soil_bacteria&diff=296620 2014-04-21T21:15:54Z

<p>YuediMa: New thread: Soil bacteria</p> <hr /> <div>R the role in soil of mites and nematode just grazing on soil bacteria, and stimulate the nitrogen cycle? And does heterotrophic bacteria have any roles other than decompose organic matter?</div>

YuediMa https://wiki.ubc.ca/index.php?title=User:YuediMa&diff=296619 2014-04-21T21:14:17Z

<p>YuediMa: Soil bacteria</p> <hr /> <div>R the role in soil of mites and nematode just grazing on soil bacteria, and stimulate the nitrogen cycle? And does heterotrophic bacteria have any roles other than decompose organic matter?</div>

YuediMa https://wiki.ubc.ca/index.php?title=Thread:Course_talk:APBI200/Final_Exam_Questions/reply_(28)&diff=296615 2014-04-21T20:32:29Z

<p>YuediMa: Reply to Final Exam Questions</p> <hr /> <div>So when there are both regosolic and chernozem diagnose (e.g., has an Ap of more than 10cm, and doesn't has a B horizon) I should still recognize it as chernozem ?</div>

YuediMa https://wiki.ubc.ca/index.php?title=Thread:Course_talk:APBI200/Final_Exam_Questions/reply_(12)&diff=296464 2014-04-20T16:50:00Z

<p>YuediMa: Reply to Final Exam Questions</p> <hr /> <div>Hi, Maja. For this 2008 final question, is that because the Cg horizon also has a j, which means the Cg horizon is not obvious, so it's not gleysol ? Or is there some other reasons?<br /> Thanks!</div>

YuediMa https://wiki.ubc.ca/index.php?title=Thread:Course_talk:APBI200/A_question_about_soil_horizons/reply_(3)&diff=285484 2014-03-31T05:33:40Z

<p>YuediMa: Reply to A question about soil horizons</p> <hr /> <div>Hi, Maja, can I say the horizon with both A and B horizon properties is AB for Q 2d? And for 2a, should I count it as LFH or Ah?</div>

YuediMa https://wiki.ubc.ca/index.php?title=Thread:Course_talk:APBI200/Lab_Assignment_5_Questions/reply_(3)&diff=281152 2014-03-11T03:21:13Z

<p>YuediMa: Reply to Lab Assignment #5 Questions</p> <hr /> <div>Hi, Maja, for question 2, is it because those four factors need time to have an affect on the formation of soil, so parent material has the most effect on the soil profile formation during the early stage?</div>

YuediMa https://wiki.ubc.ca/index.php?title=Thread:Course_talk:APBI200/Lab_Assignment_4_Questions/reply_(3)&diff=279396 2014-03-04T00:23:12Z

<p>YuediMa: Reply to Lab Assignment #4 Questions</p> <hr /> <div>Hi, Maja, for question 4b, following the irrigation, because Na ions promote dispersion and colloids are far apart, so we just need to consider ESP to see which is most likely to disperse?<br /> Thanks!</div>

YuediMa https://wiki.ubc.ca/index.php?title=Thread:Course_talk:APBI200/Midterm_Exam_Questions/reply_(24)&diff=277938 2014-02-25T22:16:53Z

<p>YuediMa: Reply to Midterm Exam Questions</p> <hr /> <div>Hi, Maja, in 2008 midterm , how to identify the soil structure, I can only tell that the first one is sand and second one might be clay since it has higher water retentive ability, for structure, should I answer something like spheroid, blocky?<br /> Thank you!</div>

YuediMa