Conversion Calculator

A useful conversion calculator between various units of measurement commonly used in agriculture.

Plant Nutrients

The nutrient content of fertilizers can be declared as either oxide or elemental. These converters allow conversions between the two units.

P from/to P2O5

  • (Elemental, P * 2.294) = Oxide, P2O5
  • (Oxide, P2O5 * 0.436) = Elemental, P

K from/to K2O

  • (Elemental, K * 1.205) = Oxide, K2O
  • (Oxide, K2O * 0.830) = Elemental, K

S from/to SO3

  • (Elemental, S * 2.50) = Oxide, SO3
  • (Oxide, SO3 * 0.4) = Elemental, S

Mg from/to MgO

  • (Elemental, Mg * 1.658) = Oxide, MgO
  • (Oxide, MgO * 0.603) = Elemental, Mg

Ca from/to CaO

  • (Elemental, Ca * 1.399) = Oxide, CaO
  • (Oxide, CaO * 0.715) = Elemental, Ca

Ca from/to CaCO3

  • (Elemental, Ca * 2.5) = Calcium Carbonate (limestone), CaCO3
  • (Calcium Carbonate (limestone), CaCO3 * 0.4) = Elemental, Ca

Na from/to Na2O

  • (Elemental, Na * 1.348) = Oxide, Na2O
  • (Oxide, Na2O * 0.742) = Elemental, Na

Na from/to NaCl (salt)

  • (Elemental, Na * 2.542) = Sodium Chloride (salt), NaCl
  • (Sodium Chloride (salt), NaCl * 0.393) = Elemental, Na

Fertigation

Fertigation and water analyses can be reported as a concentration of nutrients (mmol per litre) or as the weight of nutrients (mg per litre). These converters allow you to easily switch between the two units.

Nitrate (N)

  • (N mmol/l * 14.007) = N mg/l
  • (N mg/l * 0.0713928749910759) = N mmol/l

Ammonium (N)

  • (N mmol/l * 14.007) = N mg/l
  • (N mg/l * 0.0713928749910759) = N mmol/l

Phosphorus (P)

  • (P mmol/l * 30.9737) = P mg/l
  • (P mg/l *0.0322854550796321) = P mmol/l

Potassium (K)

  • (K mmol/l * 39.0983) = K mg/l
  • (K mg/l *0.0255765595946627) = K mmol/l

Calcium (Ca)

  • (Ca mmol/l * 40.078) = Ca mg/l
  • (Ca mg/l *0.0249513448774889) = Ca mmol/l

Magnesium (Mg)

  • (Mg mmol/l * 24.305) = Mg mg/l
  • (Mg mg/l * 0.0411437975725159) = Mg mmol/l

Sulphur (S)

  • (S mmol/l * 32.06) = S mg/l
  • (S mg/l * 0.0311915159076731) = S mmol/l

Boron (B)

  • (B mmol/l * 10.81) = B mg/l
  • (B mg/l * 0.0925069380203515) = B mmol/l

Copper (Cu)

  • (Cu mmol/l * 63.546) = Cu mg/l
  • (Cu mg/l * 0.0157366317313442) = Cu mmol/l

Iron (Fe)

  • (Fe mmol/l * 55.845) = Fe mg/l
  • (Fe mg/l * 0.01790670606142) = Fe mmol/l

Manganese (Mn)

  • (Mn mmol/l * 54.938) = Mn mg/l
  • (Mn mg/l * 0.0182023371800939) = Mn mmol/l

Molybdenum (Mo)

  • (Mo mmol/l * 95.95) = Mo mg/l
  • (Mo mg/l * 0.0104220948410631) = Mo mmol/l

Sodium (Na)

  • (Na mmol/l * 22.9897) = Na mg/l
  • (Na mg/l * 0.0434977402923918) = Na mmol/l

Zinc (Zn)

  • (Zn mmol/l * 65.38) = Zn mg/l
  • (Zn mg/l * 0.0152951973080453) = Zn mmol/l

Chloride (Cl)

  • (Cl mmol/l * 35.45) = Cl mg/l
  • (Cl mg/l * 0.0282087447108604) = Cl mmol/l

Bicarbonate (HCO3)

  • (HCO3 mmol/l * 61.0168) = HCO3 mg/l
  • (HCO3 mg/l * 0.0163889289507152) = HCO3 mmol/l

Yield and Rate

Various units can be used to express weight per area for measurement of crop yield or fertilizer application rates. These converters allow conversions between common metric and imperial units.

kg per ha to cwt per acre

  • (kilogram per hectare * 0.007962) = hundred-weight per acre (cwt/acre)
  • (hundred-weight per acre (cwt/acre) * 125.6) = kilogram per hectare

kg per ha to units per acre

  • (kilogram per hectare * 0.8) = units per acre
  • (units per acre * 1.25) = kilogram per hectare

kg per ha to bags per acre (1 bag = 50 kg)

  • (kilogram per hectare * 0.00809717) = bags per acre
  • (bags per acre * 123.5) = kilogram per hectare

litre per ha to gallon per acre

  • (litre per hectare * 0.08901) = gallon per acre
  • (gallon per acre * 11.23) = litre per hectare

cubic m per hectare to gallons per acre

  • (cubic metres per hectare * 89.0184) = gallons per acre
  • (gallons per acre * 0.0112336) = cubic metres per hectare

t/ha to t/acre

  • (tonnes per hectare, t/ha * 0.405) = tons per acre, t/acre
  • (tons per acre, t/acre * 2.47) = tonnes per hectare, t/ha

t per ha to lb per acre

  • (tonnes per hectare, t/ha * 893) = pound per acre, lb/acre
  • (pound per acre, lb/acre * 1.12 * pow(10,-3)) = tonnes per hectare, t/ha

Concentration

g per kg from/to %

  • (gram per kilogram, g/kg * 0.1) = percent, %
  • (percent, % * 10) = gram per kilogram, g/kg

mg per kg from/to ppm

  • (milligram per kilogram, mg/kg * 1) = parts per million, ppm
  • (parts per million, ppm * 1) = milligram per kilogram, mg/kg

mg per kg from/to ppb

  • (milligram per kilogram, mg/kg * 1) = parts per billion, ppb
  • (parts per billion, ppb * 1000) = milligram per kilogram, mg/kg

cmol per kg from/to meq per 100g

  • (centimole per kilogram, cmol/kg * 1) = milliequivalents per 100 grams, meq/100g
  • (milliequivalents per 100 grams, meq/100g * 1) = centimole per kilogram, cmol/kg

Weight or Mass

g from/to lb

  • (gram, g (10-3 kg) * 2.20 * pow(10,-3)) = pound, lb
  • (pound, lb * 454) = gram, g (10-3 kg)

g from/to oz

  • (gram, g (10-3 kg) * 3.52 * pow(10,-2)) = ounce, (avdp), oz
  • (ounce, (avdp), oz * 28.4) = gram, g (10-3 kg)

kg from/to lb

  • (kilogram, kg * 2.205) = pound, lb
  • (pound, lb * 0.454) = kilogram, kg

kg from/to q

  • (kilogram, kg * 0.01) = quintal (metric), q
  • (quintal (metric), q * 100) = kilogram, kg

Irrigation Water

Various units are used to measure the amount of water applied to an area for irrigation. Here are some conversions between the common metric and imperial units.

m3 from/to acre-in

  • (cubic meter, m3 * 9.73 * pow(10,-3)) = acre-inches, acre-in
  • (acre-inches, acre-in * 102.8) = cubic meter, m3

m3/h from/to ft3/s

  • (cubic meter per hour, m3 h-1 * 9.81 * pow(10,-3)) = cubic feet per second, ft3 s-1
  • (cubic feet per second, ft3 s-1 * 101.9) = cubic meter per hour, m3 h-1

ha-m from/to acre-ft

  • (hectare-meters, ha-m * 8.11) = acre-feet, acre-ft
  • (acre-feet, acre-ft * 0.123) = hectare-meters, ha-m

ha-m from/to acre-in

  • (hectare-meters, ha-m * 97.28) = acre-inches, acre.in
  • (acre-inches, acre.in * 1.03 * pow(10,-2)) = hectare-meters, ha-m

ha-cm from/to acre-ft

  • (hectare-centimeters, ha-cm * 8.1 * pow(10,-2)) = acre-feet, acre-ft
  • (acre-feet, acre-ft * 12.33) = hectare-centimeters, ha-cm

Pressure

PSI from/to Bar

  • (bar * 14.50377377968587) = pound per square inch, PSI
  • (pound per square inch, PSI * 0.0689475729) = bar

MPa from/to atmosphere

  • (megapascal, MPa (106 Pa) * 9.90) = atmosphere
  • (atmosphere * 0.101) = megapascal, MPa (106 Pa)

MPa from/to bar

  • (megapascal, MPa (106 Pa) * 10) = bar
  • (bar * 0.1) = megapascal, MPa (106 Pa)

Pa from/to lb-ft

  • (pascal, Pa * 2.09 * pow(10,-2)) = pound per square foot, lb ft-2
  • (pound per square foot, lb ft-2 * 47.9) = pascal, Pa

Pa from/to lb-in

  • (pascal, Pa * 1.45 * pow(10,-4)) = pound per square inch, lb in-4
  • (pound per square inch, lb in-4 * 6.90 * pow(10,3)) = pascal, Pa

Temperature

K from/to C

  • (Kelvin, K - 273) = Celsius, oC
  • (Celsius, oC + 273) = Kelvin, K

C from/to F

  • (((9 / 5) * Celsius, oC) + 32) = Fahrenheit, oF
  • ((5 / 9) * (Fahrenheit, oF - 32)) = Celsius, oC

Maximise returns on nitrogen

Maximise returns on nitrogen

Yara nitrogen response trials confirm you should be expecting a return of at least 400% on nitrogen

Following Yara's recommendations will help you achieve the maximum return on investment in fertilizer.

Increasing Grain Protein Levels with Chafer Nufol

Increasing Grain Protein Levels with Chafer Nufol

Chafer Nufol is a source of foliar nitrogen that can be applied to wheat crops between growth stages 69 to 75 (end of flowering up to milky ripe) in order to increase the level of grain protein. Typically, protein levels can be increased by 1% through a well-timed application of Nufol.