Nutrient Management

From 5th year onwards, apply 50 kg of FYM or compost or green manure. 1.3 kg urea (560 g N), 2.0 kg super phosphate (320 g P2O5) and 2.0 kg muriate of potash (1200 g K2O) in two equal splits during June – July and December – January.
Apply manures and fertilizers in circular basins of 1.8 m from the base of the palm, incorporate and irrigate.
During 2nd, 3rd and 4th year ¼, ½ and ¾ doses of the above fertilizer schedule should be adopted respectively.
Sufficient moisture should be present at the time of manuring.
Fertigation may be done at monthly intervals with 75% of the recommended dose of the above fertilizers.
Phosphorus may be applied as super phosphate in the basins and incorporated or as DAP through drip when good quality of water is available.

TNAU Coconut Tonic Nutrition
For nut bearing coconut, root feeding of TNAU coconut tonic @200ml/palm once in six months is recommended.

Mix all the contents in sufficient quantity of compost or FYM and apply near feeding roots once in 6 months / palm starting from planting. Don’t mix with chemical fertilizers and pesticides

Any one of the green manure crops like sunnhemp, wild indigo, calapagonium or daincha may be sown and ploughed in situ at the time of flowering as a substitute of compost to be applied.
Sow sunnhemp @ 50 g/palm in the basin and incorporate before flowering.
Coir pith compost/vermicompost made from coir pith/ coconut leaves/ other wastes from coconut grove can be applied.

Manurial and fertilizer recommendation (Soil application/tree/year)

Urea 1.3 kg
Super phosphate 2.0 kg
Muriate of potash* 3.5 kg
* Increased quantity is recommended to increase the plant resistance to the mite.
Neem cake application @ 5 kg
Organic manure (well rotten FYM) @ 50 kg

Borax 50 g
Gypsum 1.0 kg
Magnesium sulphate 500g
Grow sunnhemp as intercrop twice a year (Seed rate 30 kg/ha)

Because of micronutrient deficiency, the stem will taper towards its tip with lesser number of leaves. The leaf size will be greatly reduced and the leaves will be pale and yellow in colour. Along with the recommended fertilizer dose, 225 g each of Borax, Zinc sulphate, Manganese sulphate, Ferrous sulphate, Copper sulphate and 10 g of Ammonium molybdate may be dissolved in 10 litres of water and poured in the basin of 1.8 m radius. This disorder can be corrected if noticed early. Severely affected palms may be removed and replanted with new seedlings.

Button shedding
Shedding of buttons and premature nuts may be due to any one of the following reasons:

Excess acidity or alkalinity
Lack of drainage
Severe drought
Genetic causes
Lack of nutrients
Lack of pollination
Hormone deficiency
Pests
Diseases

Excess acidity or alkalinity of soil may cause button shedding. If the soil pH is less than 5.5, it is an indication of excess acidity. This could be rectified by adding lime. Increase in alkalinity is indicated by soil pH higher than 8.0. This situation could be rectified by adding gypsum.

Button shedding occurs due to inadequate or lack of manuring. The recommended dose of manurial schedules and proper time of application are important to minimise the button shedding. Apply extra 2 kg of muriate of potash with 200 g of Borax/palm over and above the usual dosage of fertilizer to correct the barren nuts in coconut for period of 3 years.

Boron deficiency or crown choke disorder : Apply 200 g of borax/palm/year in two splits.agement :: Rice


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Nutrient Management :: Coconut

*Coconut (Cocos nucifera)* Manuring From 5th year onwards, apply 50 kg of FYM or compost or green manure. 1.3 kg urea (560 g N), 2.0 kg super phosphate (320 g P2O5) and 2.0 kg muriate of potash (1200 g K2O) in two equal splits during June – July and December – January. Apply manures and fertilizers in circular basins of 1.8 m from the base of the palm, incorporate and irrigate. During 2nd, 3rd and 4th year ¼, ½ and ¾ doses of the above fertilizer schedule should be adopted respectively. Sufficient moisture should be present at the time of manuring. Fertigation may be done at monthly intervals with 75% of the recommended dose of the above fertilizers. Phosphorus may be applied as super phosphate in the basins and incorporated or as DAP through drip when good quality of water is available. TNAU Coconut Tonic Nutrition For nut bearing coconut, root feeding of TNAU coconut tonic @200ml/palm once in six months is recommended. Bio-fertilizer recommendation 50 g of Azospirillum 50 g of Phosphobacteria ( or ) 100 g Azophos 50 g of VAM Mix all the contents in sufficient quantity of compost or FYM and apply near feeding roots once in 6 months / palm starting from planting. Don’t mix with chemical fertilizers and pesticides Organic recycling Any one of the green manure crops like sunnhemp, wild indigo, calapagonium or daincha may be sown and ploughed in situ at the time of flowering as a substitute of compost to be applied. Sow sunnhemp @ 50 g/palm in the basin and incorporate before flowering. Coir pith compost/vermicompost made from coir pith/ coconut leaves/ other wastes from coconut grove can be applied. Manurial and fertilizer recommendation (Soil application/tree/year) Urea 1.3 kg Super phosphate 2.0 kg Muriate of potash* 3.5 kg * Increased quantity is recommended to increase the plant resistance to the mite. Neem cake application @ 5 kg Organic manure (well rotten FYM) @ 50 kg Micronutrients (Soil application / tree / year) Borax 50 g Gypsum 1.0 kg Magnesium sulphate 500g Grow sunnhemp as intercrop twice a year (Seed rate 30 kg/ha) SPECIAL PROBLEMS IN COCONUT Pencil point disorder (Micronutrient deficiency) Because of micronutrient deficiency, the stem will taper towards its tip with lesser number of leaves. The leaf size will be greatly reduced and the leaves will be pale and yellow in colour. Along with the recommended fertilizer dose, 225 g each of Borax, Zinc sulphate, Manganese sulphate, Ferrous sulphate, Copper sulphate and 10 g of Ammonium molybdate may be dissolved in 10 litres of water and poured in the basin of 1.8 m radius. This disorder can be corrected if noticed early. Severely affected palms may be removed and replanted with new seedlings. Button shedding Shedding of buttons and premature nuts may be due to any one of the following reasons: Excess acidity or alkalinity Lack of drainage Severe drought Genetic causes Lack of nutrients Lack of pollination Hormone deficiency Pests Diseases The following remedial measures are suggested. a. Rectification of soil pH Excess acidity or alkalinity of soil may cause button shedding. If the soil pH is less than 5.5, it is an indication of excess acidity. This could be rectified by adding lime. Increase in alkalinity is indicated by soil pH higher than 8.0. This situation could be rectified by adding gypsum. e. Lack of nutrition Button shedding occurs due to inadequate or lack of manuring. The recommended dose of manurial schedules and proper time of application are important to minimise the button shedding. Apply extra 2 kg of muriate of potash with 200 g of Borax/palm over and above the usual dosage of fertilizer to correct the barren nuts in coconut for period of 3 years. Boron deficiency or crown choke disorder : Apply 200 g of borax/palm/year in two splits.agement :: Rice

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