As per transplanted rice except Azolla.

Use of LCC has more advantage in N management. .

N management through LCC or Apply fertilizer nutrients as per STCR-IPNS .

Time of application is decided by LCC score.

Take observations from 14 DAT in transplanted rice or 21 days after sowing in direct seeded rice.

Repeat the observations  at weekly intervals up to heading.

Observe the leaf colour in the fully opened third leaf from the top as index leaf.

Match the leaf color with the colours in the chart during morning hours (8-10 am).

Take observation in 10 places.

LCC critical value is 3.0 in low N response cultivars like White Ponni and 4.0 in other cultivars and hybrids

When 6/10 observations show less than the critical colour value, N can be applied @ 35kg N/ha in dry season and 30kg N/ha in wet season per application per ha.