(IPPM) in Vegetables - Vegetableipmasia.org

Resource Manual on IPPM in Rice
World Education Philippines, Inc.
5 x 100
N = = 11.1 kg urea
45
5 x 100
N = = 19.2 kg ammonium chloride
26
10 x 100
P 2 O 5 = = 33.3 kg of calcined phosphate
30
15 x 100
K 2 0 = = 30.0 kg of sulfate of potash
30
93.6 kg of straight fertilizers
+ 6.4 kg of filler
100.0 kg of mixed fertilizer
For preparing a metric ton of mixed fertilizer of the 10-10-15 grade, the
following quantities of straight fertilizers and filler will be required:
Urea
Ammonium chloride
Calcined phosphate
Sulfate of potash
Filler
= 11.1 x 10 = 111 kg
= 19.2 x 10 = 192 kg
= 33.3 x 10 = 333 kg
= 30,0 x 10 = 300 kg
= 6.4 x 10 = 64 kg
1,000 kg or one metric ton
Example 5
In this example, one of the straight fertilizers supplies two plant nutrients.
Prepare 500 kg of an 8-12-12 fertilizer supplies in which half of the nitrogen is
in the form of ammonium sulfate (20% N) and mono-ammonium phosphate
(11% N and 40% P 2 O 5 ). P 2 O 5 and K 2 O are to be added in the form of ordinary
superphosphate (20% P 2 O 5 ) and muriate of potash (60% K 2 O), respectively.
Eight kilograms of nitrogen in every 100 kg of mixture are supplied with:
For N
4 kg N in ammonium sulfate
2 kg N in ammonium chloride
2 kg N in mono-ammonium phosphate
4 x 100
N =
20
= 20.0 kg ammonium sulfate
32