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Abstract
A study has been made on the influence of nitrate and ammonia nitrogen on the carbon dioxide compensation point (T), carboxylating enzymes and growth of highveld grasses found at the primary, secondary and climax successional stages. The results obtained are discussed in relation to the influence of nitrogen on grassland succession found on the highveld.
Uittreksel
‘n Studie is gemaak van die invloed van nitraat en ammonia stikslof op die koolsuurgas kompensasie punt (T), karboksilerende ensieme en groei van Hoëveldse grasse in die primére. sekondere en ktimaks stadiums van opvolging. Die resultate word bespreek met verwysing na die invloed van stikstof op grasveldopvolging op die Hoëveld.