"Nitrogen fertilisers" refers to substances that are used to provide nitrogen, an essential nutrient, to plants for their growth and development. They are added to the soil to improve soil fertility and increase crop productivity. Full definition
These findings can also be illustrated in other aspects of resource use: the team found the highest rate of increase in the cultivation of arable land to be in the 1950s; the peak for human - made irrigation areas then followed in the 1970s, and the peak for nitrogen fertilisers was subsequently in the 1980s. (sciencedaily.com)
One scenario required 6.9 billion hectares of plantation, fed by 570 million tons of nitrogen each year, and even the smallest theoretical plantation would have extended over a billion hectares and consumed 96 million tons of nitrogen fertiliser every year. (climatenewsnetwork.net)
Ditto nitrogen fertilisers currently made from natural gas. (johnquiggin.com)