Foliar feeding of maize – the way to achieve better crops

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Find out what are the recommended products and fertilization methods to grow excellent maize and corn

For human consumption & for oil extraction

Growth stage	Recommended products	Rate*
Growth stage	Recommended products	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

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

2. For seed production

Growth stage	Recommended products	Rate*
Growth stage	Recommended products	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
Corn (at tasseling)	------------------------ % -------------------------							--------------- 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 sampling	Tasseling
Plant part	Midrib of 1st leaf above primary ear

Plant tissue sampling procedures

Stage of growth	Plant part
Seedling stage	All of above ground portion
Prior to tasseling	First fully developed leaf below whorl