There are several different things to consider when planning nutrient applications to Maize. On the next page there is a step by step guide which can be followed to achieve accurate understanding of what your crop needs and how to achieve its requirements. Remember: This is only a guide and requirements and nutrient values may differ depending on specific situations. *NPK requirements derived from RB209. MgO & SO3 requirements adapted from industry recommendations in RB209 (Fertiliser Manual) & PDA booklet (Potash Development Association).
Step 1 - Decide on your YIELD POTENTIAL
EXAMPLE : (Soil indices @ SNS 1, P 2, K 2- & Mg 2) Working on an average of 40 t/ha my maize crop requires...
N P
K MgO SO₃
125
55
175
30
60
Step 2 - Choose your STARTER FERTILISER
EXAMPLE: Maize Fix 3 ( 5N-14P-34K+ 4MgO + 8SO3 ) down the spout @ 360 kg/ha will apply...
N P
K MgO SO₃
18
44
122 14.5
29
Step 3 - Choose your MAIN FERTILISER...
...depending on ORGANIC MANURE USAGE EXAMPLE: Planning on applying 25 m3/ha of CATTLE SLURRY in late spring and incorporating within 24 hours giving...
N P
K MgO SO₃
23
30
63
15
3
Maize Handbook 2020 22
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