Field Research & Agronomy
Nutrient Removal
Fungicide Coating Calculator
Liquid Fertilizer Quantity Calculator
Nitrogen to Product Calculator
The amount of fertilizer required to provide a target nitrogen rate (kg/ha)
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Product to Nitrogen Calculator
Nitrogen applied (kg/ha) at a given rate of Liquid fertilizer (l/ha)
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There are nutrients required by crops that are not accounted for in a simple nutrient balance accounting for kg applied and kg exported in grain. This is partially due to the following:
- The remaining stubble contains high quantities of nutrients that are not translocated into the grain (especially in the case of K and S). Depending on the fate of the stubble, these nutrients may, or may not be, returned to the soil for use by future crops or pastures.
- The soil, organic matter and atmosphere can contribute differing amounts of some required nutrients (N, S and some trace elements)
- There may be a low plant availability of applied nutrients due to sorption by soil and organic matter particles (P and trace elements).
- Soil applied nutrients may be unavailable due to dry conditions.
- Nutrient concentrations in final product can vary greatly. These are averages however can vary up to 50% under differing conditions.
Pasture
Soil Test Level
(K - ppm or mg/kg)
(K - ppm or mg/kg)
Cereals
Lupins
Canola*
Pulses
Canola*
Pulses
Low Rainfall
Medium Rainfall
High Rainfall
>120
0
0
0
0
0#
80 - 120
P.T.
0
0
10-20
20-30
60 - 80
15-20
0
10-20
20-30
30-40
40 - 60
20-25
P.T.
20-30
30-50
40-60
25-35
20-25
30-50
40-60
50-60
Product
Autumn Application
Winter Application
After 4 weeks
After 7 weeks
After 4 weeks
After 7 weeks
Amsul
3.7
6.9
1.0
2.5
Urea
59.9
58.4
36.8
38.9
Cations
Anions
Chemical Symbol & Charge
Name
Chemical Symbol & Charge
Name
K+
Potassium
NO3-
Nitrate
NH4+
Ammonium
Cl-
Chlorine
Na+
Sodium
SO4--
Sulphate
Cu++
Copper
HPO4- -
Phosphate
Zn++
Zinc
BO3----
Boron
Mn++
Manganese
MoO4- -
Molybdenum
Ca++
Calcium
Mg++
Magnesium
Fe++
Iron
N
P
K
S
Cu
Zn
Mn
Ca
Mg
Clover Pasture
25-30
3.5
16-20
2-3
0.005
0.02
0.40
0.4
1.2
Product
% N
Urea
46.0
MAXam/Amsul
21.0
UreaPlus
37.1
NitroPlus
33.4
Compounds
Product
%Ammonium-N
DAPSZC
16.4
MAPSZC
10.6
AllStar
13.0
Vigour
5.0
Product
N
P
K
S
Ca
Mg
Cu
Zn
Mn
kg per tonne
grams per tonne
Wheat
23
3
4
1.4
0.33
0.93
5
29
40
Barley
20
2.9
4.4
1.1
0.3
1.08
3
15
11
Oats
16
3
4
1.5
0.5
1.0
3
17
40
Canola
40
6.5
9.2
9.8
4.1
4.0
4
40
40
Lupins
51
3.8
8.8
3.1
1.7
1.7
5
30
60
Chickpeas
34
3.8
8.9
1.8
1.1
1.2
7
38
34
Faba Beans
39
3.8
9.8
1.4
1.1
1.0
10
28
30
Field Peas
37
4.0
8.2
2.0
0.7
1.2
5
35
14
Hay - cereal
15
1.0
15
1.0
0.5
1.1
5
12
40
Straw - cereal
7
0.7
10
0.7
3
3
Milk
5.7
0.95
1.4
0.3
1.2
0.12
Greasy Wool
170
0.26
15.8
28.5
1.2
0.3
Sheep - Live
34
7.0
2.3
4.0
14.4
0.4