I'm a new user of R, which I use in my studies in digital soil mapping. I have my data, as you can see in my .csv file. There are columns SN (sample number), SAND, SILT, CLAY, OM (Organic Matter). I am trying to create a variogram for each property. Specifically, one variogram for clay, one for silt, one for sand, and one for organic matter.[
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Any ideas of how I can accomplish this?
Ps I have tried to write some code in R, but from the screenshots you can see, I managed to create the following variograms that I don't believe are so good, and I failed to make kriging.
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The variogram I created: 
As for the kriging errors, i got this:
Thank you in advance ^_^
I tried to write the code that I show you in three parts.
