The responses of eragrostis chloromelas steud. To levels of water, nitrogen and phosphorus applied to soils from the willem pretorios game reserve

Abstract

Biomass of Eragrostis chloromelas was increased by increasing water content in pots of soils derived from sandstone and from dolerite from 11 to 33 and 100 per cent of water‐holding capacity and by increasing soil nitrogen and phosphorus contents to 2, 5 and 10 times their native levels. The response was larger to nitrogen at high and to phosphorus at low water level.

Uittreksel

Die biomassa van Eragrostis chloromelas is verhoog deur die waterinhoud van grond van sandsteen‐ en dolerietoor‐sprong in pptte van 11 na 33 en 100 persent waterhouvermoë te verhoog en deur die natuurlike stikstof‐ en fosforpeile van die grond tot 2, 5 en 10 keer te vergroot. Die verhoging in biomassa was groter by stikstof saam met hoë en fosfor saam met lae waterpeile.