Twenty 6 x 6 m plots with a 3-meter buffer zone were established on
the Jornada Basin in 1986. Five plots each were randomly assigned to
one of four treatments: (1) chlordane amendment (100ml AI (Active
Ingredients) per 10,000 ml) to exclude microarthropods, (2) water
(irrigation 6 mm per week), (3) water (6 mm per week) plus chlordane
amendment (100 ml AI per 10,000 ml) and (4) control, no treatment.
Fluff grass plants were permanently tagged in each of the 20 plots
to be measured in March, July, and September. In March, 20 plants
were measured in each plot; in July, 7 plots had 10 measurements and
13 plots had 20 measurements; in September, 7 plots had 10 plants
and 13 plots had 16 plants measured. The data measurements in this
package consist of the longest diameter (cm) on the plant (DIAM1),
the diameter (cm) perpendicular to the longest diameter (DIAM2), and
height of the plants (cm).