Relative Yield From Acidity (%) dataset is one of 11 national surfaces,
represented by ~1km grids, relating to economic opportunities associated with
soil condition. All dollar values are given in 1996/97 Australian dollars.
There are three sub-types of data in this dataset: relative yields, gross
benefits and impact costs. Each is described as follows:1. Relative yield
(RY): This is the yield of the crop or pasture, relative to its full potential
expressed as a percentage. It is equal to actual yield divided by potential
yield. The relative yield surfaces, measured as a ratio (0 to 1) and
represented with a 1km grid, include: * ry_salt2000; ry_salt2020: The relative
yield of salinity in the year 2000 and 2020* ry_Acid; ry_Esp: The relative
yield from soil acidity and soil sodicity* ry_min: The limiting factor
relative yield a minimum of ry_salt2000, ry_acid, ry_esp and ry_min.*
lim_fact:Factor most limiting yield a of acidity, sodicity and salinity 2.
Gross benefit (GB): The gross benefit is the additional profit at full equity
attainable through agricultural production if the yield-limiting factor of
salinity, acidity or sodicity were repaired without cost. As such it can be
considered an approximate investment ceiling on treating the soil. The gross
benefit grids are measured in $/ha/yr and include:* gb97a; gb97e; gb97s a for
soil acidity; sodicity; salinity* gb97m a the combined limiting factor gross
benefit. 3. Impact cost (ic97s): This is the decline in agricultural profit at
full equity due to worsening dryland salinity severity and extent over the
time period 2000 to 2020. It is measured in $/ha/yr. It is determined only
through changes in crop yield as a consequence of changes in dryland salinity.
Impact cost can be considered the loss in profit at full equity due to
worsening salinity over the 20yr time period. Keywords: Economics, Natural
Resources, Australia, Salinity, Sodicity, Acidity, Soil TreatmentData is in
albers and unprojected, using WGS84 and GDA94.
See [further metadata](http://data.daff.gov.au/anrdl/metadata_files/pa_easc_r9cl
__08312a07.xml) for more detail.