The document discusses nitrogen management in rice using a Leaf Color Chart (LCC). The LCC is a cheap and easy tool that helps determine the exact nitrogen needs of rice by comparing leaf colors to a standardized scale. Taking periodic LCC readings allows farmers to apply only the needed amount of nitrogen fertilizer, improving nitrogen use efficiency over traditional methods. Using the LCC can increase rice yields while decreasing fertilizer costs and pollution compared to applying nitrogen without considering the crop's needs. The LCC is a beneficial tool for rice farmers that improves profits through optimized nitrogen management.

1. INSTITUTE OF AGRICULTURAL SCIENCES
RAWE PRESENTATION
EXT-411
NITROGEN MANAGEMENT IN RICE BY USING LEAF COLOUR CHART (LCC)
Submitted to:-
Prof. O. P. Mishra
Dr. B. Jirli
Submitted by:-
Arvind Kumar(14026)
B.Sc.(Ag) 4th Yr.

3. Problem:-
Difficult in determination of nitrogen doses.
In traditional method nitrogen use efficiency is
less(20-30%).
Less availability of urea in the market due to
malpractices.
Black marketing of urea.
Higher prices of urea.
If use of less nitrogen-
• Leaf become yellow and the plant growth are
affected cause reduction of yield.

4. Due to excess use of nitrogen-
• Vegetative growth is more than
reproductive growth, cause crop lodging.
• Infestation of insect pest increases.
• Causes harmful effect on other nutrients.
• Causes environment and water pollution.
• More cost of cultivation.
Loss of nitrogen due to-
• Denitrification.
• Volatalization.
• Leaching.
• Runoff loss.

6. Solution:-
LCC help in determination of exact
dose of nitrogen requirement, hence
reducing the nitrogen losses.
Leaf color chart is the cheapest
and easiest tool for nitrogen
assessment and management.

7. What is leaf color chart (LCC).
The LCC had been jointly
developed by IRRI and Philippines
rice research institute (Philirice).
It is based on the leaf colour.
Easy Tools for the Need and
Assessment of Nitrogen in Paddy ,
maize, sugarcane, potato and
vegetable crops.

9. Principle:-
The intensity of the leaf colour
shows the relation of nitrogen to
photosynthesis.
The intensity of the leaf colour
is indicative of the amount of
nitrogen.

11. How to use leaf color chart?
 First of all, select the 10 healthy
plants from 14 days after
transplanting or 21 days after
sowing where plants extended in
equally.
Now compare with LCC of these
10 plants parts i.e. fully extended
leaf only.

12. Measuring time 8:00-10:00 AM or
2:00-4;00 PM and one important
thing is that – in the time of
measuring do not penetrate the light
in that plants so make a shade.
Only one person takes a reading
from first to last.
Take a reading every 7-10 days
interval.

13. Variety of
paddy
Critical
value
Nitrogen requirement
Non-
Basmati
4 28 kg N / ha or 62.5 kg
Urea
Basmati 3 23 Kg N/ha or 50Kg/ha
urea
Direct
Seeded
3 23 Kg N/ha or 50Kg/ ha
urea
Boro rice 4 35 Kg N/ha or 76Kg/ha
urea

15. Advantages :-
Increase crop production per hectare.
It saves 20-30 kg of nitrogen per hectare.
Improve nitrogen use efficiency of plants.
Easy to use .
Do not require any type of power.
Cheap than S.P.A.D.
Comparatively less effect of disease and
pest.

16. Limitation of LCC
Less famous.
Less availability.
Solar radiation.
Critical value is different for different
variety and crop.
Visibility of individuals.
Biological factors.
Other nutrient deficiency.

17. Precautions at the time of reading
Nitrogen fertilizer is applied when the reading is
less than critical value.
Only one person takes a reading from first to last.
Measuring time 8:00-10:00 or 2:00-4:00 is
effective.
At the time of measuring make shade on LCC on
leaf.
Left border 15 meter at 1-hectare area .
Do not pick the leaf.
Do not select disease and pest affected leaf.

19. S.L.
No.
Different cost Traditional method (cost,
yield, net income)
LCC Method (cost. Yield, net
income)
1. General cost Rs- 36872/ha Rs- 36872/ha
2. Nitrogen 140Kg/ha Rs-1625/ha 120Kg/ha Rs- 1337/ha
3. Labour 6 la/ha Rs-1800/ha 9 la/ha RS-2700/ha
4. LCC Rs-110/lcc
5. Total cost Rs-40297/ha Rs-41059/ha
6. Yield .
Paddy
45 Ql/ha Rs- 63000/ha 54Ql/ha Rs-75600/ha
7. Straw 68ql/ha Rs-13600/ha 81ql/ha Rs-16200/ha
8. Total income Rs-76600/ha Rs-91800/ha
9. Net income Rs-36303/ha Rs-50741/ha
10. Extra beneffit Rs- 14438/ha