Beomjeong Kim

6 Questions 7 Answers 0 Followers

Questions related from Beomjeong Kim

Can I use 'Day' variable when I do regression analysis?

I would like to estimate relationships among soil CO₂ efflux, soil temperature and soil moisture under experimental drought condition. I set the variables like below. Dependent variable (Y): soil...

21 November 2017 5,105 6 View

Paired t-test and normality test question

Hello. I'd like to run paired t-test about tree growth between control plot and treatment plot. I have 30 tree samples respectively and I measured diameters of trees 1 year ago and this year. For...

31 May 2017 1,506 5 View

Is it okay to assume stream water as pure water to calculate water density?

Hello. I wonder if it is fine to assume stream water as pure water when I calculate water density. Pure water density is 1.0 kg / L at 4'C, and it decreases as the temperature increases. So, the...

03 November 2016 8,029 13 View

What is the relationship between barometric data and absolute pressure data when calculating water level?

Hello. I'm using a water level logger named 'HOBO U20'. According to its manual, the Logger records absolute pressure, whichis later converted to water level readings by the software. Normally,...

02 November 2016 1,174 10 View

Why does water-holding capacity increase as structure develops in coarse-textured soils?

Hello. While I was reading a textbook about soil science, I had a question. "As structure develops in coarse-textured soils, water-holding capacity is increased. As structure develops in...

24 October 2016 4,168 15 View

How to compute the daily average using R?

I'd like to know how to analyse data by using R. I attached a sample file (csv). I made this csv file with data from short period but I have much longer data so I'd like to know how to analyse. I...

19 October 2016 9,376 4 View