Dear Ana

please have a look t following liks:

http://www.advancecovercrops.com/understanding-the-carbon-nitrogen-ratio-cn/

http://compost.css.cornell.edu/calc/2.html

https://norganics.com/index-2/calculation-pages/calculate-your-cn-ratio/

http://www.extsoilcrop.colostate.edu/Soils/powerpoint/compost/carbon_to_nitrogen_ratio.pdf

good luck

Dear Anna

Our optimum C:N ratio is 24:1 for desired decomposition of our crop residue. The ratio 24:1 is the proper carbon and nitrogen that a microorganism must have in order sustain its health. A microorganism living in the soil has a C:N ratio of about 8:1; this is what they must maintain in their bodies.

For plant C and N analysis first you have to go for dry ashing or wet digestion technique followed by an efficient method for estimation.

The microbes will pull all available nitrogen from the soil that is necessary to reach its optimum ratio of 24:1.

A crop that has a lower C:N ratio, like legumes, allows the decomposition takes place rather quickly and the excess nitrogen becomes available in the soil for other growing plants. This is what allows us to begin to consider reducing our nitrogen rates properly managed system.If unavailable C is small, the C:N ratio can be reduced by bacteria to 10.

I'm not looking for methods but for any publications where people have already measured C:N ratios in sedum plants. I'm want to understand more about the nitrogen use efficiency in sedum spp..