Page 56 - GSA Annual Report / Jaarverslag 2013
Basic HTML Version
Insetnavorsing en -ontwikkeling
Inputs research and development
54
The fertiliser industry (continued)
Agricultural lime
During the 2012/2013 production season six different lime sources were monitored. The quality of lime is
evaluated according to physical (particle size) and chemical requirements. In compliance with regulations,
the standards require that 100% of the particles must be smaller than 1 700 μm and 50% smaller than
250 μm. The permissible deviation on particle size is 7%. With regard to the chemical composition, calcitic
lime may not contain more than 4,3% magnesium and dolomitic lime at least 4,3% magnesium. For both
types of lime, the calcium carbonate equivalent (CCE [HCL]) must be at a minimum of 70%. In
Table 6
the
results of the quality of agricultural lime analysed for the past five years are given.
No. Lime type
Season
2008/2009
Season
2009/2010
Season
2010/2011
Season
2011/2012
Season
2012/2013
1 Std calcitic
1 700 µm
-
1 700 µm
-
-
2 Std dolomitic
None
1 700 µm
-
1 700 µm
-
3 Std dolomitic
None
-
-
-
-
4 Microfine dolomitic
-
None
-
-
-
5 Std calcitic
-
-
-
-
-
6 Std dolomitic
-
-
-
-
-
7
Std dolomitic
-
1 700 µm
None
1 700 µm
1) CCE (HCl)
2) 1 700 µm
Std calcitic
1 700 µm
-
-
1 700 µm/ Mg % -
8 Std dolomitic
1 700 µm
-
-
-
-
9 Std dolomitic
-
-
-
-
-
10 Std calcitic
CCE (HCI)
-
-
-
-
11 Std calcitic
-
-
-
-
-
12 Std dolomitic
None
250 µm
-
-
-
13 Std calcitic
-
-
-
-
-
Nr. Tipe kalk
Seisoen
2008/2009
Seisoen
2009/2010
Seisoen
2010/2011
Seisoen
2011/2012
Seisoen
2012/2013
1 Std kalsiet
1 700 µm
-
1 700 µm
-
-
2 Std dolomiet
Geen
1 700 µm
-
1 700 µm
-
3 Std dolomiet
Geen
-
-
-
-
4 Mikrofyn dolomiet
-
Geen
-
-
-
5 Std kalsiet
-
-
-
-
-
6 Std dolomiet
-
-
-
-
-
7
Std dolomiet
-
1 700 µm
Geen
1 700 µm
1) KKE (HCl)
2) 1 700 µm
Std kalsiet
1 700 µm
-
-
1 700 µm/ Mg % -
8 Std dolomiet
1 700 µm
-
-
-
-
9 Std dolomiet
-
-
-
-
-
10 Std kalsiet
KKE (HCI)
-
-
-
-
11 Std kalsiet
-
-
-
-
-
12 Std dolomiet
Geen
250 µm
-
-
-
13 Std kalsiet
-
-
-
-
-
Table 6: Analysis of agricultural lime sources.
Tabel 6: Ontleding van landboukalkbronne.
Die kunsmisbedryf (vervolg)
Landboukalk
Gedurende die 2012/2013-produksieseisoen is ses verskillende kalkbronne gemonitor. Die kwaliteit van
kalk is aan die hand van fisiese (deeltjiegrootte) en chemiese vereistes geëvalueer. In ooreenstemming met
regulasies vereis die standaarde dat 100% van die deeltjies kleiner as 1 700 μm en 50% kleiner as 250 μm
moet wees. Die toelaatbare afwyking in deeltjiegrootte is 7%. Ten opsigte van chemiese samestelling moet
kalsitiese kalk hoogstens 4,3% magnesium en dolomitiese kalk ten minste 4,3% magnesium bevat. Vir albei
tipes kalk moet die kalsiumkarbonaat-ekwivalent (KKE [HCL]) ‘n minimum van 70% wees.
Tabel 6
bevat die
resultate van die kwaliteit van landboukalk wat die afgelope vyf jaar ontleed is.
During the 2012/2013
production season
six different lime
sources were
monitored.
