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Methods for Experiment 007 -

Field Operations: Fencing

Three out of the six plots in each of the two fields are fenced with poultry netting, approximately 2 meters high, to exclude deer. The plots were fenced in the fall of 1982.

Field Operations: Fertilization

The amount of fertilizer (NH4NO3) received by the plots fertilized is equal to the amount given to those plots receiving treatment "E" in E001. This is not the same rate that the plots in E001 receive, however. The rate for this experiment, with 25m2 plots, is 5.12g/m2 per application. This fertilizer was added in to a 1m2 area around the base of trees.

Sampling for A007

All trees in controls and exclosures were tagged, mapped, examined for browsing damage, and measured annually (maximum height) from 1983 through 1989. Soil cores were taken in the fall of 1983. Four cores in each 5 meter length, 2m apart across the middle of the 5 meters, were combined into one sample. This made 6 samples per plot. The cores were taken to a depth of 10cm. Pocket gopher mounds were mapped on these plots every year from 1986 to 1989. Future sampling will be done at variable intervals, probably every 3-5 years.

Sampling for B007

All trees in controls and exclosures were tagged, mapped, examined for browsing damage, and measured annually (maximum height) from 1983 through 1989. Soil cores were taken in the fall of 1983. Four cores in each 5 meter length, 2m apart across the middle of the 5 meters, were combined into one sample. This made 6 samples per plot. The cores were taken to a depth of 10 cm. Pocket gopher mounds were mapped on these plots every year from 1986 to 1989. Future sampling will be done at variable intervals, probably every 3-5 years.

Treatment layout : trmte07

Field IdentificationExperiment NumberPlot NumberSectionTreatmentAmmonium Nitrate(34-0-0)addition(g/m2/yr)Annual FenceTreatment
A71155100
A7129000
A7139000
A71455100
A71555100
A7169000
A7179000
A71855100
A7199000
A711055100
A71119000
A71129000
A7219001
A72255101
A72355101
A7249001
A72555101
A7269001
A7279001
A72855101
A7299001
A721055101
A72119001
A72129001
A7319000
A73255100
A73355100
A7349000
A7359000
A73655100
A73755100
A7389000
A7399000
A731055100
A73119000
A73129000
A7419000
A74255100
A74355100
A7449000
A7459000
A74655100
A7479000
A74855100
A74955100
A74109000
A74119000
A74129000
A7519001
A75255101
A7539001
A75455101
A7559001
A75655101
A75755101
A7589001
A75955101
A75109001
A75119001
A75129001
A76155101
A7629001
A7639001
A76455101
A76555101
A7669001
A76755101
A7689001
A76955101
A76109001
A76119001
A76129001
B7119000
B71255100
B7139000
B71455100
B7159000
B71655100
B71755100
B7189000
B7199000
B711055100
B71119000
B71129000
B7219001
B72255101
B72355101
B7249001
B72555101
B7269001
B7279001
B72855101
B72955101
B72109001
B72119001
B72129001
B73155100
B7329000
B7339000
B73455100
B73555100
B7369000
B7379000
B73855100
B73955100
B73109000
B73119000
B73129000
B74155100
B7429000
B7439000
B74455100
B7459000
B74655100
B74755100
B7489000
B74955100
B74109000
B74119000
B74129000
B75155101
B7529001
B75355101
B7549001
B75555101
B7569001
B75755101
B7589001
B7599001
B751055101
B75119001
B75129001
B7619001
B76255101
B76355101
B7649001
B7659001
B76655101
B76755101
B7689001
B7699001
B761055101
B76119001
B76129001
 

Vegetation Sampling Methods

In 1983, ground cover for plots in the deer exclosures was determined. Percent cover was not done, but a list of species present was made. Six plots per exclosure (one in each 5m of length) were set up. These plots were located randomly within each of those blocks. Random numbers for placements were assigned.

All trees were tagged, mapped, examined for browsing damage, and measured (maximum height) annually from 1983 through 1989. Future sampling will be done at variable intervals, probably every 3-5 years.