India’s fertiliser addiction fiddle
The Economic Survey 2009-10 has attempted to conceal the true impact of chemical fertiliser abuse in India. Chapter 2 of the Survey deals with agriculture, and the Survey states: “The per hectare consumption of fertilisers in nutrients terms increased from 105.5 kg in 2005-06 to 128.6 kg in 2008-09.” This is false. Here is why.
In 1950-51 the average fertiliser use in India was only 0.58 kg per hectare. The net sown area was 118.75 million hectares upon which 69,000 tons of fertiliser were used. Of course this is a notional average use only, as 60 years ago fertiliser was an agricultural input in only a few districts which were being primed for what was to become the Green Revolution. Still, that was the ‘national average’. It took 16 years before that average crossed 10 kg of fertiliser per hectare, and that happened in 1967-68 when the net sown area was 139.88 million hectares and the total fertiliser use was 1.53 million tons.
Thereafter it took only 5 years to reach 20kg/ha. The period 1971-72 to 1975-76 saw little change – the only such period in the last 60 years – in intensity of fertiliser use. Those were the years of the global oil crisis, the so-called first oil shock of the seventies. For that time, the ‘national average’ remained between 18 and 20 kg/ha while the total net sown area varied but little from 140 million hectares and total fertiliser use stayed between 2.65 and 2.89 million tons.
Per hectare application of fertiliser continued its upward trend from 1975-76 and it took less than 8 years to cross 50kg/ha and another 6 years to cross 80kg/ha – in 1989-90 India’s total fertiliser use was 11.56 million tons. In the decade of the 1990s, total fertiliser use in India rose by 44% (from 12.54 mt to 18.06mt) and per hectare application went up by 46% as the available agricultural land plateaued at around 140 million hectares.
Both total use and per hectare application remained at those levels until 2004-05. In the last four years there has been an astonishingly steep increase in the total consumption and per hectare use. For 2008-09 the total fertiliser use at 24.9 mt is more than 6.5 mt more than the figure for 2004-05, and per hectare use has shot up to over 174 kg/ha from 130 kg/ha in 2004-05, a jump of 33% in just four years.
The Economic Survey 2009-10 states: “Chemical fertilisers have played a significant role in the development of the agricultural sector. The per hectare consumption of fertilisers in nutrients terms increased from 105.5 kg in 2005-06 to 128.6 kg in 2008-09. However, improving the marginal productivity of soil still remains a challenge. This requires increased NPK application and application of proper nutrients, based on soil analysis.”
The Survey is wrong. The per hectare use crossed 105 kg in 1997 – nine years before the Survey says it did – and crossed 130 kg in 2004-05. In 2008-09 the rude equation is: 143 million hectares of net sown area; 24.9 mt of total fertiliser consumption. The Survey has concealed true per hectare consumption of fertiliser by swapping net sown area with gross sown area. Net sown area is the land surface on which crops are grown. To assess output and productivity, when cultivated land is used to grow more than one crop per year, that area on which the second crop is grown is counted again, which gives us gross sown area.
Counting cultivated land more than once raises the sown area from 143 million hectares (net) to 190 million hectares (gross). And that is how the per hectare consumption of fertiliser is portrayed as much lower than it truly is. Chemical fertiliser however affects the parcel of land, and is not divisible by the number of crops the land is employed for. The resulting difference is enormous: 45.4 kg/hectare!
The data I have used comes from the Reserve Bank of India Handbook of Statistics on Indian Economy 2008-09. For 2007-08 and 2008-09 I used the total NPK consumption figures from the Economic Survey 2009-10.