LimeMate
  LimeMate calcuator is in two parts;
Part one is LimeMate which an aid in the calculation of  rates of soil amendment require to increase soil pH based on  a combination of  measured soil chemical parameters, soil chemistry targets, plant species aluminium tolerance and amendment quality. The  amendment rate suggested is the greater of the rate require to reduce the  soil aluminium saturation to a point where the production of the target species is unlikely to inhibited, or the rate required to raise the pH from the current level to a nominated target pH.

Part two is Product Comparison aids in the caclulating the most cost effective source of  amendment when there are multiple sources available. Recommended product is  based on assessment of a combination of product effectiveness characteristics, soil targets and costs.

The user needs to input their own data to all white input fields for the calculated result to be relevant.

Some input fields will provide tool tips for relavant input parameters. These can be seen bu hovering the cursor over the cells.
© Back Paddock Company 2016
 
  Disclaimer
While all reasonable efforts have been made to ensure that the information provided in this Calculator can be relied on to the extent indicated, Back Paddock Company P/L can not accept responsibility for inconvenience, material loss or financial loss resulting from the use of this Calculator.
    LimeMate   
       
  Soil eCEC cmole(+)/kg
Exchangeable Al  cmole(+)/kg
Current soil pH 
Target pH should be take into account the tolerance of all species to be grwon and the need to affect the pH of the subsoil. Generally need to target pH 5.5 (CaCl2) or 6.5 (water) to target subsoil acidity.
Target pH 
Soil OC %
Soil Clay %
Texture Class Clay %
Sand 5
Loamy Sand 7.5
Clayey Sand 10
Fine Sandy Loam 15
Loam Fine Sandy 15
Sandy Loam 15
Light Sandy Clay Loam 20
Fine Sandy Clay Loam 25
Loam 25
Clay Loam 25
Sandy Clay Loam 25
Silty Loam 25
Silty Clay Loam 32.5
Light Clay 37.5
Sandy Clay 37.5
Silty Clay 37.5
Light Medium Clay 42.5
Medium Clay 50
Heavy Clay 70
Peat 70
Effective Neutralising Value of liming product
Depth to be treated cm
Species aluminium tolerance 
<5% - Highly Sensitive
Lucerne Barrel, Strand and Burr Medic, Balansa, Burseem, Strawberry and Persian Clover
Buffel, Tall Wheat Grass
Barley, Canola
Frech Beans, Peas


< 10 % - Sensitive
Red Clover, Snail and Murex Medic, Caucasian and Kenya White Clover
Red Grass, Wallaby Grass, Pharlaris
Wheat


<15 % - Moderately Tolerant
Tall fescue, Pioneer Rhodes Grass, Rye Grasses,
Woolly pod vetch, Rose clover,Haifa White clover

<20% - Tolerant
Subterranean clover,
Oats, Maize, White lupin, Triticale (some varieties)

<30 % - Highly Tolerant
Cocksfoot, Consol Lovegrass, Paspalum, Kikuyu,Microlaena stipoides, Danthonia rasemosa, Common Couch
Yellow and Slender Seradella, Marku Lotus
Oats (some varieties), Cereal rye, Sugarcane
Blueberry
  CALCULATIONS    
Exchangeable Al %
 
Reference
Cregan P (1980) Ag Bulletin 7 NSW DPI
Lime rate for Al reduction
t/ha
Calculated pH buffer capacity
pH buffer capacity
Uses the relationship from Merry (1997) to calculate pHBC.

t CaCO3/ha 10cm = 0.31 + 0.0.282 %TC + 0.0546eCEC (n = 158; R2 = 76.2%)

TC%=OC% x 1.3

Clay % from Field texture
tCaCO3/ha/pH/10cm
Calculated  Soil Bulk Density
Bulk density
Calculated from description in: A simple model to evaluate acidic and alkaline processes in dripper irrigated
vineyards.
Richard Merry1, Ben Thomas2, Ben Robinson2 and Doug Reuter3
SuperSoil 2004: 3rd Australian New Zealand Soils Conference, 5 – 9 December 2004, University of Sydney, Australia.
g/cc
Lime requirement/10cm t/ha
Lime requirment for treated depth t/ha
Lime rate for target pH increase kg/ha
 
Rate displayed is the greater of that required to reduce aluminium to tolerance limit for the species selected or raise the pH to the target nominated.
Recommended lime rate 
t/ha
© Back Paddock Company 2016
PRODUCT 1
PRODUCT 2
  Particle size (mm) % of product
NV is the ability of a unit mass of lime to change soil pH. This takes into account the chemical composition (NV) but not particle size distribution of a lime
Neutralising Value/Purity
Total ENV is the ability of a unit mass of lime to change soil pH. This takes into account the chemical composition (NV) and particle size distribution of a lime
Effective Neutralising Value
  Particle size (mm) % of product Neutralising Value/Purity Effective Neutralising Value
0.000 - 0.125 
0.000 - 0.125 
0.125 - 0.250         
0.125 - 0.250         
0.250 - 0.500          
0.250 - 0.500          
0.500 - 1.000         
0.500 - 1.000         
above 1.000
above 1.000
TOTAL
TOTAL
Nutrient Applied
Nutrient Applied
Ca %  in product kg/ha
Ca %  in product kg/ha
Mg % in product kg/ha
Mg % in product kg/ha
pH buffering /10cm t/ha
pH buffering /10cm t/ha
NV or ENV
Use either the ENV or NV from the supplier use or the calculated ENV where the detailed product infomation is available.
NV or ENV
Area to be Treated ha
Area to be Treated ha
Depth of incorporation cm
Depth of incorporation cm
Price ex Supplier
Lime Price
$/t
Lime Price $/t
Freight $/t
Freight $/t
Spreading and loader
Spreading
$/t
Spreading $/t
Total $/t
Total $/t
Product Application Rate t/ha
Product Application Rate t/ha
Total Product tonnes
Total Product tonnes
Total cost $
Total cost $
  Cost/ha $/ha     Cost/ha $/ha  
© Back Paddock Company 2016