metre is the basic unit for measuring time.
metre is the basic unit for measuring time.
what is the basic unit for measuring time?
metre
closed mode systems, by definition, are closed without a vent. when making measurements, closed systems take a co measurement of ambient air just after the soil sample chamber is sealed. this becomes the co reference. the system continues to take measurements at regular intervals over the next few minutes until a final co concentration is recorded at a predetermined end time over time. closed systems have the advantages that they are used by more researchers, and they provide wind proof results. since there is no vent, wind is not an issue. when using a closed mode system, it is important that the experimental design include a maximum measuring time for two reasons: first; if the measuring time is too long, an unacceptable positive partial co pressure can build up in the chamber limiting the amount of additional co from entering the chamber, causing a measuring artifact. the second reason is that if a chamber that is closed for too long, it can modify ambient conditions and cause measuring artifacts. finding the optimal measuring time range is important. tests on the soil in question can confirm the best time solution, and eliminate the partial co pressure buildup from being a significant issue.
soil respiration
yuan









































yuan may refer to:









































section::::currency.









































bullet::::- yuan (currency), the basic unit of currency in historic and contemporary china and taiwan









































bullet::::- renminbi, the current currency used in china, whose basic unit is yuan









































bullet::::- new taiwan dollar, the current currency used in taiwan, whose basic unit is yuán in mandarin









































bullet::::- manchukuo yuan, the unit of currency that was used in the japanese puppet state of manchukuo









































section::::governmental organ.









































bullet::::- "court", the name for a kind of institution.









































in the government of the republic of china:









































bullet::::- control yuan









































bullet::::- examination yuan









































bullet::::- executive yuan









































bullet::::- judicial yuan
yuan