Chemical Fertlizers as Component of INM in Mango - CORRECTED

8/2/2019 Chemical Fertlizers as Component of INM in Mango - CORRECTED

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Chemical Fertilizers as a component of INM in MangoChemical Fertilizers as a component of INM in Mango

(Sources, Methods, Doses and time of application)(Sources, Methods, Doses and time of application)

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Introduction

Chemical Fertilizers as a component of INM in Mango

For better nutrient use efficiency chemical fertilizers arefrequently used by the farmers. In this RLO we will

discuss sources, methods, doses and time of application

of chemical fertilizers

Soil of India are generally poor in fertility and low in organic matter.

Among major nutrients, N deficiency is universal.

The soil health problem is expected to further aggravate

with increasing target of food production to meet the food

need of ever increasing population of the country.Thus the important task for integrated nutrient

management is the efficient management of the soil to

keep it productive through continuous application of

fertilizers and organic manures.

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Thus it is important to have an idea about source of

nutrient, methods and time of application and

placement of fertilizers for better nutrient use

efficiency.


Chemical fertilizers have been the key elements in enhancing the

fruit production in India.

Fertilizer is the macro-micro nutrients carrier which when

applied judiciously to soil or foliage meets the nutrient need of

the crop. From the point of view of environmental protection theword judicious is very relevant in the nutrient management.

For efficient fertilizer management, split application,

appropriate timing, proper placement, etc need to be

adopted.

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Introduction


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Sources of nitrogen

Fertilizer N (%)

Urea 46.0

Calcium Ammonium Nitrate 26.0

Ammonium Nitrate 34.0

Ammonium chloride 25.0

Calcium Nitrate 15.5

Ammonium sulphate 20.6


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Sources of phosphorous

Fertilizer P (%)

Single super phosphate 16.0

Rock phosphate 18.0

Bone meal 20.0


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Source of potassium

Fertilizer K (%)

Potassium sulphate 52

Potassium chloride 60

Potassium Magnesium Sulphate 22


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Mix fertilizers used as NPK source

Fertilizer N (%) P (%) K (%)

DAP 18 46 -

Potassium Nitrate 13 - 45

NPK (15:15:15) 15 15 15

NPK (10:26:26) 10 26 26

NPK (12:32:16) 12 32 16


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Sources of micronutrient

Micronutrient Source Content (%)

Copper Copper sulphate 35

Copper Cu EDTA 13

Iron Ferrous sulphate 20

Iron Basic slag 13

Boron Borax 11

Boron Boric acid 17

Manganese Manganese sulphate 24

Zinc Zinc sulphate 36


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Doses of Primary Nutrients recommended for Mango

The doses applied in the subsequent years should beThe doses applied in the subsequent years should be

increased every year upto 10 years in the multiple of the firstincreased every year upto 10 years in the multiple of the first

years doseyears dose

Age of Mango plant

(in years)

Nutrient dose (g)

N P K

1 100 50 100

10 1000 500 1000

11 -do- -do- -do-


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Doses of secondary nutrients recommended in Mango

Borax is applied from 5Borax is applied from 5thth year at the rate of 125 g/tree andyear at the rate of 125 g/tree andincreased 25 g every year.increased 25 g every year.

Age of the plant

(in years)

Nutrient dose (g)

Copper sulphate Zinc sulphate Borax

1 25 25 -

10 250 250 250


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Fertilizers Factor Fertilizers Factor

Nitrogenous fertilizers Phosphatic fertilizers

Urea 2.17 Single super phosphate 6.25

Calcium ammonium nitrate 3.85 Rock phosphate 5.56

Ammonium nitrate 2.94 Bone meal 5.00

Ammonium chloride 4.0 Potassic fertilizers

Calcium nitrate 6.45 Potassium sulphate 1.92

Ammonium sulphate 4.84 Potassium chloride 1.66

Potassium magnesiumsulphate

4.55

Factor for calculating quantity of different fertilizers


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May be given a small numerical example of calculatingMay be given a small numerical example of calculating

doses of chemical fertilizers by using these factors (ifdoses of chemical fertilizers by using these factors (if

possible)possible)

Factor for calculating quantity of different fertilizers


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Time of application


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Non-bearing plants can be supplied fertilizers in several split doses.

This helps in avoiding loss of nutrient through leaching since root

system of young plants are not so elaborated.

Bearing trees, apply full quantity of nitrogenous fertilizers, half

phosphorous and half potash just after harvesting of fruits in

June/July.

The other half quantity of phosphorous and potash should

be applied in October with last irrigation.

Foliar application of 3 % urea in sandy soils is

recommended before flowering.


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Fertilizer application method


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In addition to source of nutrients, time

of application and doses, the method

of fertilizer application is also

important in nutrient management.

Fertilizers must be equallydistributed on the root

zone area from 30 cm tree

trunk to drip line in mango

trees.

Drip irrigation in

Mango


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Fertilizer application method

After broad casting, fertilizers should

be incorporated thoroughly to thesoil by cultivating the top soil.

Care should be taken not to damage

the roots. Urea must only be applied

when the soils are moist otherwisetrees must be irrigated immediately

after urea application.Click


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Let Us sum up


Timely correction of nutrients deficiency is utmost important for

getting maximum yield without deteriorating plant health.

To meet the nutrients requirement of mango tree one can applydifferent fertilizers. Application of fertilizers at right time and

judiciously is very important.

Amount of different fertilizers should be calculated based on

nutrients available in those particular fertilizers. Timely

application of fertilizers can boost the productivity of the mango.

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Chemical Fertlizers as Component of INM in Mango - CORRECTED

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