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Foliar feeding of corn / maize – the way to achieve better crops

For human consumption & for oil extraction

 

Growth stage

Recommended products

Rate*

Surface application

Aerial application

1. Plants are app. 50 cm high

Multi-K ; Multi-npK; Multi-KMg

1-2 % 3-4 kg/ha

10 % 5-6 kg/ha

2. 50% of the plants are at tasseling stage (male flowers are fully seen)

Same

2 % 5 kg/ha

Same

 *Spray volume should be determined according to local vegetative conditions.

Macro elements removed by 1 ton of kernels

 

N

P

K

Ca

Mg

S

-------------------------------------- Kg/ton ------------------------------------------

15.0

3.0

4.0

0.5

1.0

1-3

*Spray volume should be determined according to local vegetative conditions.

2. For seed production

Growth stage

Recommended products

Rate*

Surface application

Aerial application

1. Plants are app. 50 cm high

Multi-K ; Multi-npK; Multi-KMg

1-2 % 3-4 kg/ha

10 % 5-6 kg/ha

2. While female flowering

Same

2 % 5 kg/ha

Same

*Spray volume should be determined according to local vegetative conditions.

Corn (whole plant)

Macro elements removed by 1 ton marketable product

N

P

K

Ca

Mg

S

-------------------------------------- Kg/ton ------------------------------------------

27

4.5

20.0

5.0

4.5

2-6

 Source: Kinoch: VOLHOUBARE LANDBOU, RSA. Processed by Frans Lourens, Haifa, RSA May, 1999.

Recommendations for fertilization of corn (grain)

 

N

P2O5

K2O

Borate

Zn sulphate

----------------------- Kg/ha -------------------------

120 

300

120

40

45

All above mineral fertilizers had been applied in addition to 10t FYM and 4t dolomitic limestone per ha. (In Vietnam)
Source: Fertilizers & Agriculture, April 1999.
 

Plant analysis guide

Nutrient sufficiency ranges (source: A & L, Agronomy Handbook, Ankerman & Large Eds.)

Corn (at tasseling)

N

S

P

K

Mg

Ca

Na

B

Zn

Mn

Fe

Cu

Al

Mo

------------------------ % -------------------------

--------------- p.p.m ---------------

From

2.80

0.20

0.25

1.80

0.20

0.30

0.01

6

25

30

50

6

20

 
To

3.50

0.50

0.40

3.00

0.50

0.70

0.03

20

50

100

250

20

300

 

 * Plant part to sample:
8-leaf stage: Whole above ground portion of plant.
Just prior to tasseling: Leaf below and opposite from ear.
Immediately after silking: Leaf below and opposite from ear.

Sweet corn:

*  Plant part to sample:

Time of samplingTasseling
Plant partMidrib of 1st leaf above primary ear

Plant tissue sampling procedures 

Stage of growthPlant part
Seedling stageAll of above ground portion
Prior to tasselingFirst fully developed leaf below whorl