Input — Cropland nitrogen per unit area in Tonga
Tonga: Input — Cropland nitrogen per unit area was 31.28 kg/ha in 2023. ▲ Rising
Input — Cropland nitrogen per unit area in Tonga, 1961–2023
Source: Food and Agriculture Organization of the United Nations. Measured in kg/ha.
Analysis
In 2023, input — cropland nitrogen per unit area in Tonga stood at 31.28 kg/ha.
The figure is up 1.1% on the previous year and down 5.6% over ten years.
Over the whole period, input — cropland nitrogen per unit area in Tonga peaked at 40.73 kg/ha in 1988 and was at its lowest, 12.69 kg/ha, in 1961.
Tonga ranks 151st of 186 countries on this measure, in the bottom quarter.
The long-run direction has been consistently rising across the 63 years of available data.
Input — Cropland nitrogen per unit area in Tonga, year by year
| Year | kg/ha | Change |
|---|---|---|
| 1961 | 12.69 kg/ha | — |
| 1962 | 14.45 kg/ha | +13.9% |
| 1963 | 14.5 kg/ha | +0.3% |
| 1964 | 14.58 kg/ha | +0.6% |
| 1965 | 14.69 kg/ha | +0.7% |
| 1966 | 16.17 kg/ha | +10.1% |
| 1967 | 15.42 kg/ha | -4.6% |
| 1968 | 16.06 kg/ha | +4.2% |
| 1969 | 15.37 kg/ha | -4.3% |
| 1970 | 16.13 kg/ha | +5.0% |
| 1971 | 15.3 kg/ha | -5.1% |
| 1972 | 14.95 kg/ha | -2.3% |
| 1973 | 16.63 kg/ha | +11.2% |
| 1974 | 18.34 kg/ha | +10.3% |
| 1975 | 19.96 kg/ha | +8.8% |
| 1976 | 24.71 kg/ha | +23.8% |
| 1977 | 27.33 kg/ha | +10.6% |
| 1978 | 32.36 kg/ha | +18.4% |
| 1979 | 32.52 kg/ha | +0.5% |
| 1980 | 32.06 kg/ha | -1.4% |
| 1981 | 36.63 kg/ha | +14.2% |
| 1982 | 33.34 kg/ha | -9.0% |
| 1983 | 30.3 kg/ha | -9.1% |
| 1984 | 27.08 kg/ha | -10.6% |
| 1985 | 32.32 kg/ha | +19.3% |
| 1986 | 34.25 kg/ha | +6.0% |
| 1987 | 37.47 kg/ha | +9.4% |
| 1988 | 40.73 kg/ha | +8.7% |
| 1989 | 35.48 kg/ha | -12.9% |
| 1990 | 33.83 kg/ha | -4.6% |
| 1991 | 36.24 kg/ha | +7.1% |
| 1992 | 35.91 kg/ha | -0.9% |
| 1993 | 35.47 kg/ha | -1.2% |
| 1994 | 32.59 kg/ha | -8.1% |
| 1995 | 29.08 kg/ha | -10.8% |
| 1996 | 28.56 kg/ha | -1.8% |
| 1997 | 29.27 kg/ha | +2.5% |
| 1998 | 28.39 kg/ha | -3.0% |
| 1999 | 28.45 kg/ha | +0.2% |
| 2000 | 29.09 kg/ha | +2.2% |
| 2001 | 31.54 kg/ha | +8.4% |
| 2002 | 31.26 kg/ha | -0.9% |
| 2003 | 31.57 kg/ha | +1.0% |
| 2004 | 30.85 kg/ha | -2.3% |
| 2005 | 30.93 kg/ha | +0.3% |
| 2006 | 30.27 kg/ha | -2.1% |
| 2007 | 31.06 kg/ha | +2.6% |
| 2008 | 35.07 kg/ha | +12.9% |
| 2009 | 34.23 kg/ha | -2.4% |
| 2010 | 31.01 kg/ha | -9.4% |
| 2011 | 31.17 kg/ha | +0.5% |
| 2012 | 32.06 kg/ha | +2.8% |
| 2013 | 33.14 kg/ha | +3.4% |
| 2014 | 31.78 kg/ha | -4.1% |
| 2015 | 30.18 kg/ha | -5.0% |
| 2016 | 31.89 kg/ha | +5.7% |
| 2017 | 32.75 kg/ha | +2.7% |
| 2018 | 31.13 kg/ha | -4.9% |
| 2019 | 31.67 kg/ha | +1.7% |
| 2020 | 31.76 kg/ha | +0.3% |
| 2021 | 32.18 kg/ha | +1.3% |
| 2022 | 30.93 kg/ha | -3.9% |
| 2023 | 31.28 kg/ha | +1.1% |
Tonga compared with similar countries
- Tonga's 31.28 kg/ha is below the median for upper middle income countries, which is 83.52 kg/ha, 37% of the median. (51 countries reporting)
- Tonga's 31.28 kg/ha is below the median for East Asia & Pacific, which is 69.62 kg/ha, 45% of the median. (23 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1960s | 14.88 kg/ha | 12.69 kg/ha | 16.17 kg/ha | 9 |
| 1970s | 21.82 kg/ha | 14.95 kg/ha | 32.52 kg/ha | 10 |
| 1980s | 33.97 kg/ha | 27.08 kg/ha | 40.73 kg/ha | 10 |
| 1990s | 31.78 kg/ha | 28.39 kg/ha | 36.24 kg/ha | 10 |
| 2000s | 31.59 kg/ha | 29.09 kg/ha | 35.07 kg/ha | 10 |
| 2010s | 31.68 kg/ha | 30.18 kg/ha | 33.14 kg/ha | 10 |
| 2020s | 31.54 kg/ha | 30.93 kg/ha | 32.18 kg/ha | 4 |
Countries ranked near Tonga
- 148 Uganda 33.26 kg/ha compare
- 149 Sierra Leone 32.96 kg/ha compare
- 150 Ghana 32.7 kg/ha compare
- 152 Guinea 30.71 kg/ha compare
- 153 Central African Republic 30.28 kg/ha compare
- 154 Saint Kitts and Nevis 30 kg/ha compare
More environment data for Tonga
- Standard Deviation, annual growth rate 0 % change on previous year (2025)
- Standard Deviation 0.234 °C (2025)
- Temperature change 0.858 °C (2025)
- Total greenhouse gas emissions excluding LULUCF (Mt CO2e), annual 3.06 % change on previous year (2024)
- Total greenhouse gas emissions excluding LULUCF (Mt CO2e), per unit 0 Mt CO2e per US$ of GDP (2024)
- Total greenhouse gas emissions excluding LULUCF (Mt CO2e), per capita 0 Mt CO2e per person (2024)
- Methane (CH4) emissions from Agriculture (Mt CO2e), annual growth rate 0.1689 % change on previous year (2024)
- Methane (CH4) emissions from Agriculture (Mt CO2e), per unit of GDP 0 Mt CO2e per US$ of GDP (2024)
- Methane (CH4) emissions from Agriculture (Mt CO2e), per capita 0 Mt CO2e per person (2024)
- Methane (CH4) emissions from Building (Energy) (Mt CO2e), annual 0 % change on previous year (2024)
Frequently asked questions
- What is input — cropland nitrogen per unit area in Tonga?
- Input — cropland nitrogen per unit area in Tonga was 31.28 kg/ha in 2023, according to Food and Agriculture Organization of the United Nations.
- What is the highest input — cropland nitrogen per unit area recorded in Tonga?
- The highest recorded value was 40.73 kg/ha in 1988.
- What is the lowest input — cropland nitrogen per unit area recorded in Tonga?
- The lowest recorded value was 12.69 kg/ha in 1961.
- How does Tonga rank for input — cropland nitrogen per unit area?
- Tonga ranks 151st out of 186 countries with data for 2023.
- Is input — cropland nitrogen per unit area rising or falling in Tonga?
- Over the last ten years it is down 5.6%. The long-run trend across the full record is rising.
- Where does this Tonga data come from?
- The figures come from Food and Agriculture Organization of the United Nations, published as part of Input — Cropland nitrogen per unit area. Statizoid updates them automatically from the source API.
Download this data
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About this data
The Cropland Nutrient balance domain contains information on the flows of nitrogen, phosphorus, and potassium from mineral fertilizer, manure applied, atmospheric deposition, crop removal, and biological fixation over cropland and per unit area of cropland. The flows are aggregated to total inputs and total outputs, from which the overall nutrient balance and nutrient use efficiency on cropland are calculated. Statistics are disseminated in units of tonnes and in kg/ha, as appropriate. Nutrient use efficiency is expressed as a fraction (%).