Moisture and area. Table II-1 describes yield and
moisture content at time of harvest and the converted
yield in kg/ha at 14% moisture. There were three blocks
containing plots of 50 m2 net area.


TABLE II-1.


Field data and standardized yield of wheat
from a phosphorus experiment in Guatemala.


 Field kg/ha
 Moisture at 14%
Block P. level kg/plot % moisture
 01 0 3.08 20.5 569
 01 40 3.68 21.0 676
 02 0 6.52 22.0 1183
 02 40 7.44 20.0 1384
 03 0 6.25 19.8 1166
 03 40 6.28 20.0 1168

Source: ICTA


Correction Factor for Area (CFA) to convert
kg/ha is calculated as follows when plot size
in square meters (m2):


weight to
is measured


 CFA = 10,000 / net plot size

The Correction Factor for Moisture (CFM) to convert weight
to a constant moisture content is estimated as follows:

 CFM = (100 % hvst. moist.) / (100 % constant moist.)

As an example, in Table II-1, for the first row the
calculations are:

 CFA = 10,000 / 50
 = 200

 CFM = (100 20.5) / (100 14)
 = 0.924

Then, for the first row, kg/ha at 14% moisture is

 3.08 x 200 x 0.924 = 569