plant_diversity: Calculate plant diversity indicators

In SoilManageR: Calculate Soil Management Indicators for Agricultural Practice Assessment

Calculate plant diversity indicators

Description

Derives three indicators for plant diversity of a crop rotation based on management information (mainly sowing events).

Usage

plant_diversity(var_MGMT_data, start_year, end_year)

Arguments

var_MGMT_data	a 'management_df' with a management history
start_year	start year of the cropping sequence of interest
end_year	end year of the cropping sequence of interest

Details

For the function to work properly the species (or variety) must be mentioned in the "product" column, and all sown species of mixtures must be represented in a single row of the management_df each.

The function calculates the crop diversity index (CDI), the total number of different species, and the Shannon index for all sown species.

The CDI is calculated in the following way inspired by \insertCiteTiemann_2015;textualSoilManageR:

CDI = \overline{S_{year}} * S_{rotation}

where \overline{S_{year}} is the average number of sown species per year and S_{rotation} is the total number of different species sown in the full crop rotation or cropping sequence.

The Shannon Index is calculated with the shannon_index() function.

Value

a tibble with three indicators for plant diversity

References

\insertAllCited

See Also

• calculate_indicators() to calculate all management indicators for a management_df

• shannon_index() for more detail on the Shannon index

Examples

plant_diversity(EXAMPLE_data,2013,2020)

SoilManageR documentation built on June 8, 2025, 9:36 p.m.