Nitrogen use efficiency in Samoa
Samoa: Nitrogen use efficiency was 32.3% in 2014. ▼ Falling
Nitrogen use efficiency in Samoa, 1961–2014
Source: Lassaletta et al. (2014) – processed by Our World in Data. Measured in %.
Analysis
Samoa recorded 32.3% for nitrogen use efficiency in 2014.
That represents a change of down 15.0% on the previous year and up 0.3% over ten years.
Over the whole period, nitrogen use efficiency in Samoa peaked at 59.5% in 1982 and was at its lowest, 10.0%, in 2001.
Samoa ranks 134th of 205 countries on this measure, in the middle of the range.
The long-run direction has been consistently falling across the 54 years of available data.
Nitrogen use efficiency in Samoa, year by year
| Year | % | Change |
|---|---|---|
| 1961 | 54.2% | — |
| 1962 | 54.6% | +0.6% |
| 1963 | 54.3% | -0.4% |
| 1964 | 57.9% | +6.6% |
| 1965 | 49.3% | -14.9% |
| 1966 | 50.0% | +1.4% |
| 1967 | 39.6% | -20.8% |
| 1968 | 47.3% | +19.6% |
| 1969 | 52.0% | +9.9% |
| 1970 | 45.0% | -13.6% |
| 1971 | 58.8% | +30.7% |
| 1972 | 58.7% | -0.1% |
| 1973 | 55.3% | -5.8% |
| 1974 | 59.3% | +7.3% |
| 1975 | 52.9% | -10.7% |
| 1976 | 49.4% | -6.6% |
| 1977 | 53.9% | +9.1% |
| 1978 | 46.2% | -14.3% |
| 1979 | 56.7% | +22.6% |
| 1980 | 55.6% | -1.9% |
| 1981 | 43.7% | -21.3% |
| 1982 | 59.5% | +36.0% |
| 1983 | 50.2% | -15.5% |
| 1984 | 43.4% | -13.5% |
| 1985 | 45.8% | +5.5% |
| 1986 | 44.3% | -3.3% |
| 1987 | 38.4% | -13.3% |
| 1988 | 36.8% | -4.2% |
| 1989 | 39.7% | +7.8% |
| 1990 | 34.1% | -14.0% |
| 1991 | 25.8% | -24.5% |
| 1992 | 30.4% | +17.8% |
| 1993 | 30.3% | -0.1% |
| 1994 | 29.4% | -3.1% |
| 1995 | 34.9% | +19.0% |
| 1996 | 36.5% | +4.4% |
| 1997 | 35.1% | -3.8% |
| 1998 | 36.4% | +3.8% |
| 1999 | 19.7% | -46.0% |
| 2000 | 10.7% | -45.4% |
| 2001 | 10.0% | -7.1% |
| 2002 | 32.7% | +227.6% |
| 2003 | 32.5% | -0.6% |
| 2004 | 32.2% | -0.9% |
| 2005 | 33.2% | +3.0% |
| 2006 | 33.5% | +0.9% |
| 2007 | 31.7% | -5.2% |
| 2008 | 33.9% | +6.9% |
| 2009 | 37.6% | +10.9% |
| 2010 | 37.9% | +0.6% |
| 2011 | 39.1% | +3.2% |
| 2012 | 38.5% | -1.4% |
| 2013 | 38.0% | -1.4% |
| 2014 | 32.3% | -15.0% |
Samoa compared with similar countries
- Samoa's 32.3% is below the median for upper middle income countries, which is 38.2%, 85% of the median. (57 countries reporting)
- Samoa's 32.3% is below the median for East Asia & Pacific, which is 44.5%, 73% of the median. (32 countries reporting)
Biggest year-on-year movements
Years where Nitrogen use efficiency in Samoa changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 2002 | +227.6% | 10.0% | 32.7% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1960s | 51.0% | 39.6% | 57.9% | 9 |
| 1970s | 53.6% | 45.0% | 59.3% | 10 |
| 1980s | 45.8% | 36.8% | 59.5% | 10 |
| 1990s | 31.2% | 19.7% | 36.5% | 10 |
| 2000s | 28.8% | 10.0% | 37.6% | 10 |
| 2010s | 37.2% | 32.3% | 39.1% | 5 |
Countries ranked near Samoa
More reference data data for Samoa
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 0.023 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 0.0165 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 0.0396 (2050)
- Emission Totals - Indirect emissions (N2O) - Agricultural Soils 0.0396 (2050)
- Emission Totals - Emissions (N2O) - Manure applied to Soils 0.077 (2050)
- Emission Totals - Emissions (N2O) - Manure Management 0.0626 (2050)
- Emission Totals - Emissions (N2O) - Manure left on Pasture 0.0918 (2050)
- Emission Totals - Emissions (N2O) - IPCC Agriculture 0.2319 (2050)
- Emission Totals - Emissions (N2O) - Burning - Crop residues 0 (2050)
- Emission Totals - Emissions (N2O) - Agricultural Soils 0.1693 (2050)
Frequently asked questions
- What is nitrogen use efficiency in Samoa?
- Nitrogen use efficiency in Samoa was 32.3% in 2014, according to Lassaletta et al. (2014) – processed by Our World in Data.
- What is the highest nitrogen use efficiency recorded in Samoa?
- The highest recorded value was 59.5% in 1982.
- What is the lowest nitrogen use efficiency recorded in Samoa?
- The lowest recorded value was 10.0% in 2001.
- How does Samoa rank for nitrogen use efficiency?
- Samoa ranks 134th out of 205 countries with data for 2014.
- Is nitrogen use efficiency rising or falling in Samoa?
- Over the last ten years it is up 0.3%. The long-run trend across the full record is falling.
- Where does this Samoa data come from?
- The figures come from Lassaletta et al. (2014) – processed by Our World in Data, published as part of Nitrogen use efficiency. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 54 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Nitrogen use efficiency (NUE) is the ratio between nitrogen inputs and output. A NUE of 40% means that only 40% of nitrogen inputs are converted into nitrogen in the form of crops.