31. The Primary Production Department also slapped an indefinite ban on horse traffic, newspapers reported Saturday. 32. This is a contrast to land, where most primary production is performed by vascular plants. 33. Singapore's Primary Production Department and Health and Environment Ministries said in a joint statement Friday. 34. Oceanic primary production accounts for about half of the carbon fixation carried out on Earth. 35. Global primary production can be estimated from satellite observations. 36. Variations of nitrogen in terrestrial and oceanic environments impact primary production and other biological processes. 37. It is then converted in gross primary production ( GPP ) by phytoplankton into organic carbon. 38. As of 2014, the majority land use within the locality is primary production . 39. Primary Production Department spokesman Chua Sin bin said.40. Gross primary production is a measure of the energy that a photoautotroph harvests from the sun.
