Leaf Color chart (LCC)

Technology

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) 4 th Yr.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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 .

7. 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.

8. 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.

9. 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

10. 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.

11. 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.

12. 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.

13. 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