Seed — Cropland nitrogen per unit area in Tonga
Tonga: Seed — Cropland nitrogen per unit area was 0.1774 kg/ha in 2023. ▼ Falling
Seed — Cropland nitrogen per unit area in Tonga, 1961–2023
Source: Food and Agriculture Organization of the United Nations. Measured in kg/ha.
Analysis
Tonga recorded 0.1774 kg/ha for seed — cropland nitrogen per unit area in 2023.
The figure is up 2.0% on the previous year and down 49.7% over ten years.
Over the whole period, seed — cropland nitrogen per unit area in Tonga peaked at 0.4091 kg/ha in 2007 and was at its lowest, 0.0778 kg/ha, in 1991.
That places Tonga 163rd out of 186 countries with data for 2023, putting it in the bottom quarter.
The long-run direction has been consistently falling across the 63 years of available data.
Seed — Cropland nitrogen per unit area in Tonga, year by year
| Year | kg/ha | Change |
|---|---|---|
| 1961 | 0.3597 kg/ha | — |
| 1962 | 0.2327 kg/ha | -35.3% |
| 1963 | 0.2755 kg/ha | +18.4% |
| 1964 | 0.2473 kg/ha | -10.2% |
| 1965 | 0.2279 kg/ha | -7.8% |
| 1966 | 0.2704 kg/ha | +18.6% |
| 1967 | 0.2707 kg/ha | +0.1% |
| 1968 | 0.2177 kg/ha | -19.6% |
| 1969 | 0.2657 kg/ha | +22.0% |
| 1970 | 0.2003 kg/ha | -24.6% |
| 1971 | 0.2184 kg/ha | +9.0% |
| 1972 | 0.2824 kg/ha | +29.3% |
| 1973 | 0.2312 kg/ha | -18.1% |
| 1974 | 0.2747 kg/ha | +18.8% |
| 1975 | 0.326 kg/ha | +18.7% |
| 1976 | 0.3119 kg/ha | -4.3% |
| 1977 | 0.2857 kg/ha | -8.4% |
| 1978 | 0.2065 kg/ha | -27.7% |
| 1979 | 0.2068 kg/ha | +0.1% |
| 1980 | 0.277 kg/ha | +33.9% |
| 1981 | 0.2594 kg/ha | -6.4% |
| 1982 | 0.1355 kg/ha | -47.8% |
| 1983 | 0.1414 kg/ha | +4.4% |
| 1984 | 0.1561 kg/ha | +10.4% |
| 1985 | 0.1482 kg/ha | -5.1% |
| 1986 | 0.1959 kg/ha | +32.2% |
| 1987 | 0.1293 kg/ha | -34.0% |
| 1988 | 0.0943 kg/ha | -27.1% |
| 1989 | 0.0928 kg/ha | -1.6% |
| 1990 | 0.0784 kg/ha | -15.5% |
| 1991 | 0.0778 kg/ha | -0.8% |
| 1992 | 0.0885 kg/ha | +13.8% |
| 1993 | 0.1184 kg/ha | +33.8% |
| 1994 | 0.1191 kg/ha | +0.6% |
| 1995 | 0.1164 kg/ha | -2.3% |
| 1996 | 0.1218 kg/ha | +4.6% |
| 1997 | 0.1394 kg/ha | +14.4% |
| 1998 | 0.1613 kg/ha | +15.7% |
| 1999 | 0.1661 kg/ha | +3.0% |
| 2000 | 0.1725 kg/ha | +3.9% |
| 2001 | 0.177 kg/ha | +2.6% |
| 2002 | 0.1771 kg/ha | +0.1% |
| 2003 | 0.177 kg/ha | -0.1% |
| 2004 | 0.1765 kg/ha | -0.3% |
| 2005 | 0.1766 kg/ha | +0.1% |
| 2006 | 0.2191 kg/ha | +24.1% |
| 2007 | 0.4091 kg/ha | +86.7% |
| 2008 | 0.4058 kg/ha | -0.8% |
| 2009 | 0.39 kg/ha | -3.9% |
| 2010 | 0.3851 kg/ha | -1.3% |
| 2011 | 0.3822 kg/ha | -0.8% |
| 2012 | 0.3521 kg/ha | -7.9% |
| 2013 | 0.3524 kg/ha | +0.1% |
| 2014 | 0.2386 kg/ha | -32.3% |
| 2015 | 0.2204 kg/ha | -7.6% |
| 2016 | 0.1737 kg/ha | -21.2% |
| 2017 | 0.1738 kg/ha | +0.1% |
| 2018 | 0.1635 kg/ha | -5.9% |
| 2019 | 0.1632 kg/ha | -0.2% |
| 2020 | 0.1664 kg/ha | +2.0% |
| 2021 | 0.1691 kg/ha | +1.6% |
| 2022 | 0.174 kg/ha | +2.9% |
| 2023 | 0.1774 kg/ha | +2.0% |
Tonga compared with similar countries
- Tonga's 0.1774 kg/ha is below the median for upper middle income countries, which is 0.8638 kg/ha, 21% of the median. (51 countries reporting)
- Tonga's 0.1774 kg/ha is below the median for East Asia & Pacific, which is 0.4634 kg/ha, 38% of the median. (23 countries reporting)
Biggest year-on-year movements
Years where Seed — Cropland nitrogen per unit area 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 |
|---|---|---|---|
| 2007 | +86.7% | 0.2191 kg/ha | 0.4091 kg/ha |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1960s | 0.2631 kg/ha | 0.2177 kg/ha | 0.3597 kg/ha | 9 |
| 1970s | 0.2544 kg/ha | 0.2003 kg/ha | 0.326 kg/ha | 10 |
| 1980s | 0.163 kg/ha | 0.0928 kg/ha | 0.277 kg/ha | 10 |
| 1990s | 0.1187 kg/ha | 0.0778 kg/ha | 0.1661 kg/ha | 10 |
| 2000s | 0.2481 kg/ha | 0.1725 kg/ha | 0.4091 kg/ha | 10 |
| 2010s | 0.2605 kg/ha | 0.1632 kg/ha | 0.3851 kg/ha | 10 |
| 2020s | 0.1717 kg/ha | 0.1664 kg/ha | 0.1774 kg/ha | 4 |
Countries ranked near Tonga
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 seed — cropland nitrogen per unit area in Tonga?
- Seed — cropland nitrogen per unit area in Tonga was 0.1774 kg/ha in 2023, according to Food and Agriculture Organization of the United Nations.
- What is the highest seed — cropland nitrogen per unit area recorded in Tonga?
- The highest recorded value was 0.4091 kg/ha in 2007.
- What is the lowest seed — cropland nitrogen per unit area recorded in Tonga?
- The lowest recorded value was 0.0778 kg/ha in 1991.
- How does Tonga rank for seed — cropland nitrogen per unit area?
- Tonga ranks 163rd out of 186 countries with data for 2023.
- Is seed — cropland nitrogen per unit area rising or falling in Tonga?
- Over the last ten years it is down 49.7%. The long-run trend across the full record is falling.
- Where does this Tonga data come from?
- The figures come from Food and Agriculture Organization of the United Nations, published as part of Seed — Cropland nitrogen per unit area. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 63 observations, free to reuse under CC BY-NC-SA 3.0 IGO (FAO).
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 (%).