Neem-coated urea: the national mandate

In May 2015, the Union government ordered domestic urea producers to neem-coat their entire output. An approach previously permitted for part of production became a national requirement. The Agriculture Ministry’s contemporary account dated the order to 25 May, following a March requirement covering 75% of domestic production. [1]

A later parliamentary reply reported that the whole domestic supply was neem coated from 1 September 2015 and the imported supply from 1 December. Those dates describe the government’s account of implementation; the reply was not an independent audit of every consignment. [3]

From permitted production to a mandate

Neem-coated urea had entered fertiliser policy before the Modi government took office. In June 2008, manufacturers were allowed to produce fortified or coated subsidised fertilisers up to 20% of their respective production. In January 2011, the ceiling for neem-coated urea rose to 35%. [2]

These were permitted ceilings, rather than measured adoption rates. The 2015 orders changed the obligation on producers, moving first to a 75% requirement and then to 100%. The earlier governments’ policy groundwork, the Union government’s mandate and the manufacturers’ and importers’ implementation were successive parts of the rollout. [1] [2] [3]

The agricultural purpose

The ministry described neem as a nitrification inhibitor, slowing a soil process through which nitrogen becomes more vulnerable to loss. Its July 2015 statement estimated nutrient-use efficiency at 5–10% above plain urea. That was an official technical estimate, rather than a guarantee of the same saving or yield increase on every farm. [1]

Early findings were favourable. In March 2017, the government summarised a commissioned study reporting yield increases of 5.79% for paddy and 7.14% for maize. Those were study findings attributed to the government, rather than established nationwide gains. [2]

A peer-reviewed paper published in 2022 examined roughly 1,200 farmers across six states using observations from Kharif 2015. It reported benefits across the crops studied, but acknowledged that other favourable factors could have contributed. Its assessment covered a single season immediately after the policy change, when some farmers could have used both ordinary and neem-coated urea. [4]

The paper therefore offered evidence about an early transition. Its publication in 2022 did not make the farm observations a measurement of conditions seven years after the mandate. Nor could a single-season comparison establish a uniform, lasting benefit across every crop and region. [4]

Diversion and continued enforcement

Discouraging the diversion of subsidised agricultural urea to other uses was another purpose of the policy. The early research made a strong claim about stopping diversion, but that finding cannot establish permanent elimination across the country. [4]

On 22 August 2023, the Union government was still asking states to act against diversion of agricultural urea for non-agricultural purposes. It reported 45 FIRs against defaulting urea-using units, alongside other enforcement action. An FIR records an allegation and investigation, rather than a conviction; the count does not quantify the national volume diverted. [5]

Continued enforcement does not establish that neem coating had no effect. It does leave the scale of the reduction unresolved without comparable evidence on diversion before and after the reform, including changes in detection. Eight years after the mandate, enforcing the intended use of subsidised urea remained part of the government’s work. [5]