SeedEqMC: Seed equilibrium moisture content and equilibrium relative...

In aravind-j/viabilitymetrics: Seed Viability Calculations and Curve Fitting

Description

Compute the following metrics:

SeedEqMC

The seed equilibrium moisture content from known environmental conditions and oil content.

EqRH

The equilibrium relative humidity of the seed storage environment from seed equilibrium moisture content, oil content and temperature.

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Usage

SeedEqMC(oilcontent, rh, temp, basis = c("wet", "dry"))

EqRH(oilcontent, mc, temp, basis = c("wet", "dry"))

Arguments

oilcontent	The percentage oil content of seed (dry basis).
rh	Relative humidity expressed in percentage.
temp	Temperature in °C.
basis	The type of estimation of moisture content specified in the argument mc. Either "wet" or "dry".
mc	The seed equilibrium moisture content on wet or dry basis (according to argument basis).

Details

This relationship between seed equilibrium moisture content, seed oil content, the equilibrium relative humidity and temperature of the storage environment was described by \insertCitecromarty_design_1982;textualviabilitymetrics as follows.

\mjsdeqn

(1-R) = \textrme^-\left( \bigg[ \fracM_e \times \big(1.1 + \fracT90 \big)1 - D_O \bigg]^2\bigg/440 \right)

Where, \mjseqnR is the relative humidity expressed as decimal, \mjseqnM_e is the equilibrium percentage moisture content (dry basis), \mjseqnT is the temperature in °C of air or the seed equilibrium, \mjseqnD_O is the oil content of seed (dry basis) expressed as decimal and \mjseqne is the mathematical constant 2.718282.

For values of oil content (oilcontent), relative humidity (rh) and seed equilibrium moisture content (mc) beyond the limits of 0-100 %, a warning is issued.

Value

For SeedEqMC, the seed equilibrium moisture content on wet or dry basis (according to argument basis) expressed in percentage.

For EqRH, the equilibrium relative humidity expressed in percentage.

Note

The above expression by \insertCitecromarty_design_1982;textualviabilitymetrics is recommended for temperature and humidity ranges of 0-40 °C and 10-70% RH for starchy seeds (eg. cereals); and 15-25 °C and 10-70% RH for oilseeds.

References

\insertAllCited

See Also

wet2dry

Examples

SeedEqMC(oilcontent = 29, rh = 13, temp = 25, basis = "wet")
SeedEqMC(oilcontent = 29, rh = 13, temp = 25, basis = "dry")

EqRH(oilcontent = 29, mc = 5, temp = 25, basis = "wet")
EqRH(oilcontent = 29, mc = 5, temp = 25, basis = "dry")

# Warning if oilcontent is beyond limits (0-100 %)
SeedEqMC(oilcontent = 125, rh = 13, temp = 25, basis = "wet")
EqRH(oilcontent = 125, mc = 5, temp = 25, basis = "wet")

# Warning if relative humidity is beyond limits (0-100 %)
SeedEqMC(oilcontent = 29, rh = 115, temp = 25, basis = "wet")

# Warning if moisture content is beyond limits (0-100 %)
EqRH(oilcontent = 29, mc = 115, temp = 25, basis = "wet")

aravind-j/viabilitymetrics documentation built on May 15, 2021, 9:10 a.m.