All Methods

Methods for Experiment 060 -

Animal Sampling Methods

Grasshoppers are sampled. Grasshopper densities are sampled in a 10m x 10m portion of the macroplot adjacent to the grasshopper cages. The density of each grasshopper species compared with that in the cages was the average over three macroplots within a fertilizer treatment. For a list of species and their taxon codes, see file ghoppers.lst.

Field Operations: Additional notes

On May 5, 1995, a wildfire burned all the plots in experiment 60 in field B.

Field Operations: Cages

Forty eight windowscreen cages (40cm x 40cm at the base and 122cm tall) were placed over existing vegetation in the macroplots in Field B ( E004).

Field Operations: Fertilization

Fertilizer is mixed and spread by hand twice a year, once in early May and once in late June. Each plot gets the fertilizer mixture specified by its fertilizer treatment code.

Sampling for B060

In 1989, at the termination of the experiment, grasshopper densities were sampled in a 10m x 10m portion of the macroplot adjacent to the grasshopper cages. The density of each grasshopper species compared with that in the cages was the average over three macroplots within a fertilizer treatment. Vegetation was sampled after cages were pulled up within the 40cm x 40cm area contained by the cage. All plants within the 40cm x 40cm area were clipped. Plants were sorted to species, dried at 45 degrees C and weighed. Vegetation was sampled in 1990 in the same way as in 1989.

Treatment layout : trmte60

Grasshopper Treatment: 1 = one grasshopper species by itself 2 = a 2nd grasshopper species by itself 3 = both grasshopper species combined 4 = no grasshoppers

Field Identification	Experiment Number	Plot Number	Macroplot Number	Nitrogen Treatment	Ammonium Nitrate(34-0-0) addition(g/m2/yr)	Grasshopper Treatment	Grasshopper ID code	Initial density	Season
B	60	1	6	I	0	3	33	3	Early
B	60	1	6	I	0	3	191	3	Early
B	60	2	6	I	0	2	191	4	Early
B	60	3	6	I	0	2	191	4	Early
B	60	4	6	I	0	1	33	5	Early
B	60	5	6	I	0	1	33	5	Early
B	60	6	6	I	0	3	33	3	Early
B	60	6	6	I	0	3	191	3	Early
B	60	7	2	I	0	2	191	4	Early
B	60	8	2	I	0	1	33	5	Early
B	60	9	2	I	0	3	33	3	Early
B	60	9	2	I	0	3	191	3	Early
B	60	10	2	I	0	2	191	4	Early
B	60	11	2	I	0	3	33	3	Early
B	60	11	2	I	0	3	191	3	Early
B	60	12	2	I	0	1	33	5	Early
B	60	13	3	I	0	1	33	5	Early
B	60	14	3	I	0	2	191	4	Early
B	60	15	3	I	0	3	33	3	Early
B	60	15	3	I	0	3	191	3	Early
B	60	16	3	I	0	2	191	4	Early
B	60	17	3	I	0	3	33	3	Early
B	60	17	3	I	0	3	191	3	Early
B	60	18	3	I	0	1	33	5	Early
B	60	19	7	G	50	3	33	3	Early
B	60	19	7	G	50	3	191	3	Early
B	60	20	7	G	50	2	191	4	Early
B	60	21	7	G	50	1	33	5	Early
B	60	22	7	G	50	3	33	3	Early
B	60	22	7	G	50	3	191	3	Early
B	60	23	7	G	50	2	191	4	Early
B	60	24	7	G	50	1	33	5	Early
B	60	25	4	G	50	1	33	5	Early
B	60	26	4	G	50	2	191	4	Early
B	60	27	4	G	50	2	191	4	Early
B	60	28	4	G	50	3	33	3	Early
B	60	28	4	G	50	3	191	3	Early
B	60	29	4	G	50	1	33	5	Early
B	60	30	4	G	50	3	33	3	Early
B	60	30	4	G	50	3	191	3	Early
B	60	31	10	G	50	3	33	3	Early
B	60	31	10	G	50	3	191	3	Early
B	60	32	10	G	50	3	33	3	Early
B	60	32	10	G	50	3	191	3	Early
B	60	33	10	G	50	2	191	4	Early
B	60	34	10	G	50	1	33	5	Early
B	60	35	10	G	50	2	191	4	Early
B	60	36	10	G	50	1	33	5	Early
B	60	37	6	I	0	4	0	0	Early
B	60	38	6	I	0	4	0	0	Early
B	60	39	2	I	0	4	0	0	Early
B	60	40	2	I	0	4	0	0	Early
B	60	41	3	I	0	4	0	0	Early
B	60	42	3	I	0	4	0	0	Early
B	60	43	7	G	50	4	0	0	Early
B	60	44	7	G	50	4	0	0	Early
B	60	45	4	G	50	4	0	0	Early
B	60	46	4	G	50	4	0	0	Early
B	60	47	10	G	50	4	0	0	Early
B	60	48	10	G	50	4	0	0	Early
B	60	1	6	I	0	1	16	4	Late
B	60	2	6	I	0	1	16	4	Late
B	60	3	6	I	0	4	0	0	Late
B	60	4	6	I	0	2	11	6	Late
B	60	5	6	I	0	4	0	0	Late
B	60	6	6	I	0	3	16	3	Late
B	60	6	6	I	0	3	11	4	Late
B	60	7	6	I	0	2	11	6	Late
B	60	8	6	I	0	3	16	3	Late
B	60	8	6	I	0	3	11	4	Late
B	60	9	2	I	0	1	16	4	Late
B	60	10	2	I	0	3	16	3	Late
B	60	10	2	I	0	3	11	4	Late
B	60	11	2	I	0	2	11	6	Late
B	60	12	2	I	0	3	16	3	Late
B	60	12	2	I	0	3	11	4	Late
B	60	13	2	I	0	4	0	0	Late
B	60	14	2	I	0	1	16	4	Late
B	60	15	2	I	0	2	11	6	Late
B	60	16	2	I	0	4	0	0	Late
B	60	17	3	I	0	3	16	3	Late
B	60	17	3	I	0	3	11	4	Late
B	60	18	3	I	0	1	16	4	Late
B	60	19	3	I	0	4	0	0	Late
B	60	20	3	I	0	2	11	6	Late
B	60	21	3	I	0	4	0	0	Late
B	60	22	3	I	0	1	16	4	Late
B	60	23	3	I	0	3	16	3	Late
B	60	23	3	I	0	3	11	4	Late
B	60	24	3	I	0	2	11	6	Late
B	60	25	7	G	50	4	0	0	Late
B	60	26	7	G	50	2	11	6	Late
B	60	27	7	G	50	1	16	4	Late
B	60	28	7	G	50	3	16	3	Late
B	60	28	7	G	50	3	11	4	Late
B	60	29	7	G	50	4	0	0	Late
B	60	30	7	G	50	3	16	3	Late
B	60	30	7	G	50	3	11	4	Late
B	60	31	7	G	50	1	16	4	Late
B	60	32	7	G	50	2	11	6	Late
B	60	33	4	G	50	2	11	6	Late
B	60	34	4	G	50	1	16	4	Late
B	60	35	4	G	50	4	0	0	Late
B	60	36	4	G	50	3	16	3	Late
B	60	36	4	G	50	3	11	4	Late
B	60	37	4	G	50	2	11	6	Late
B	60	38	4	G	50	3	16	3	Late
B	60	38	4	G	50	3	11	4	Late
B	60	39	4	G	50	1	16	4	Late
B	60	40	4	G	50	4	0	0	Late
B	60	41	10	G	50	4	0	0	Late
B	60	42	10	G	50	1	16	4	Late
B	60	43	10	G	50	4	0	0	Late
B	60	44	10	G	50	3	16	3	Late
B	60	44	10	G	50	3	11	4	Late
B	60	45	10	G	50	2	11	6	Late
B	60	46	10	G	50	3	16	3	Late
B	60	46	10	G	50	3	11	4	Late
B	60	47	10	G	50	2	11	6	Late
B	60	48	10	G	50	1	16	4	Late