Nitrogen use efficiency in Tonga
Tonga: Nitrogen use efficiency was 37.2% in 2014. ◆ Volatile
Nitrogen use efficiency in Tonga, 1961–2014
Source: Lassaletta et al. (2014) – processed by Our World in Data. Measured in %.
Analysis
The most recent figure for nitrogen use efficiency in Tonga is 37.2%, measured in 2014.
That represents a change of up 197.8% on the previous year and up 130.2% over ten years.
Over the whole period, nitrogen use efficiency in Tonga peaked at 127.2% in 1961 and was at its lowest, 6.1%, in 2003.
That places Tonga 124th out of 205 countries with data for 2014, putting it in the middle of the range.
The series is highly variable year to year, so single readings are best treated with caution.
Nitrogen use efficiency in Tonga, year by year
| Year | % | Change |
|---|---|---|
| 1961 | 127.2% | — |
| 1962 | 96.1% | -24.4% |
| 1963 | 105.3% | +9.5% |
| 1964 | 99.5% | -5.5% |
| 1965 | 98.8% | -0.7% |
| 1966 | 101.3% | +2.5% |
| 1967 | 103.3% | +2.0% |
| 1968 | 88.3% | -14.5% |
| 1969 | 98.9% | +12.0% |
| 1970 | 85.3% | -13.8% |
| 1971 | 90.3% | +5.9% |
| 1972 | 108.6% | +20.3% |
| 1973 | 87.2% | -19.7% |
| 1974 | 91.1% | +4.4% |
| 1975 | 88.7% | -2.6% |
| 1976 | 75.7% | -14.7% |
| 1977 | 66.7% | -11.9% |
| 1978 | 46.4% | -30.5% |
| 1979 | 45.5% | -1.9% |
| 1980 | 51.8% | +13.9% |
| 1981 | 42.3% | -18.4% |
| 1982 | 31.6% | -25.2% |
| 1983 | 37.0% | +17.2% |
| 1984 | 40.6% | +9.6% |
| 1985 | 33.1% | -18.5% |
| 1986 | 37.9% | +14.6% |
| 1987 | 29.3% | -22.7% |
| 1988 | 24.3% | -16.9% |
| 1989 | 25.9% | +6.2% |
| 1990 | 28.4% | +9.7% |
| 1991 | 28.0% | -1.4% |
| 1992 | 25.7% | -8.1% |
| 1993 | 31.7% | +23.2% |
| 1994 | 29.8% | -5.9% |
| 1995 | 28.5% | -4.3% |
| 1996 | 28.3% | -0.9% |
| 1997 | 28.1% | -0.6% |
| 1998 | 28.2% | +0.4% |
| 1999 | 27.5% | -2.3% |
| 2000 | 27.4% | -0.5% |
| 2001 | 28.2% | +2.9% |
| 2002 | 27.9% | -1.0% |
| 2003 | 6.1% | -78.3% |
| 2004 | 16.1% | +166.2% |
| 2005 | 18.8% | +16.3% |
| 2006 | 25.1% | +33.8% |
| 2007 | 49.0% | +95.1% |
| 2008 | 44.2% | -9.7% |
| 2009 | 9.5% | -78.6% |
| 2010 | 11.9% | +25.8% |
| 2011 | 30.1% | +152.5% |
| 2012 | 12.8% | -57.4% |
| 2013 | 12.5% | -2.6% |
| 2014 | 37.2% | +197.8% |
Tonga compared with similar countries
- Tonga's 37.2% is below the median for upper middle income countries, which is 38.2%, 97% of the median. (57 countries reporting)
- Tonga's 37.2% is below the median for East Asia & Pacific, which is 44.5%, 83% of the median. (32 countries reporting)
Biggest year-on-year movements
Years where Nitrogen use efficiency in Tonga 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 |
|---|---|---|---|
| 2014 | +197.8% | 12.5% | 37.2% |
| 2004 | +166.2% | 6.1% | 16.1% |
| 2011 | +152.5% | 11.9% | 30.1% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1960s | 102.1% | 88.3% | 127.2% | 9 |
| 1970s | 78.5% | 45.5% | 108.6% | 10 |
| 1980s | 35.4% | 24.3% | 51.8% | 10 |
| 1990s | 28.4% | 25.7% | 31.7% | 10 |
| 2000s | 25.2% | 6.1% | 49.0% | 10 |
| 2010s | 20.9% | 11.9% | 37.2% | 5 |
Countries ranked near Tonga
More reference data data for Tonga
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 0.0105 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 0.0092 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 0.0197 (2050)
- Emission Totals - Indirect emissions (N2O) - Agricultural Soils 0.0197 (2050)
- Emission Totals - Emissions (N2O) - Manure applied to Soils 0.0353 (2050)
- Emission Totals - Emissions (N2O) - Manure Management 0.0269 (2050)
- Emission Totals - Emissions (N2O) - Manure left on Pasture 0.0446 (2050)
- Emission Totals - Emissions (N2O) - IPCC Agriculture 0.1068 (2050)
- Emission Totals - Emissions (N2O) - Agricultural Soils 0.0799 (2050)
- Emission Totals - Emissions (CO2eq) from N2O (AR5) - Manure applied 9.35 (2050)
Frequently asked questions
- What is nitrogen use efficiency in Tonga?
- Nitrogen use efficiency in Tonga was 37.2% in 2014, according to Lassaletta et al. (2014) – processed by Our World in Data.
- What is the highest nitrogen use efficiency recorded in Tonga?
- The highest recorded value was 127.2% in 1961.
- What is the lowest nitrogen use efficiency recorded in Tonga?
- The lowest recorded value was 6.1% in 2003.
- How does Tonga rank for nitrogen use efficiency?
- Tonga ranks 124th out of 205 countries with data for 2014.
- Is nitrogen use efficiency rising or falling in Tonga?
- Over the last ten years it is up 130.2%. The long-run trend across the full record is volatile.
- Where does this Tonga 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.