Tamanhos de unidade experimental básica e de parcela para massa de matéria verde de crotalária juncea

Facco, Giovani; Cargnelutti Filho, Alberto; Lavezo, André; Schabarum, Denison Esequiel; Chaves, Gabriela Görgen; Silveira, Daniela Lixinski

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CROP PRODUCTION • Cienc. Rural 48 (5) • 2018 • https://doi.org/10.1590/0103-8478cr20170660 copiar

Tamanhos de unidade experimental básica e de parcela para massa de matéria verde de crotalária juncea

Autoria SCIMAGO INSTITUTIONS RANKINGS

RESUMO:

O objetivo deste trabalho foi verificar a influência do tamanho da unidade experimental básica (UEB) na estimativa do tamanho ótimo de parcela, para a avaliação da massa de matéria verde de crotalária juncea (Crotalaria juncea L.), pelo método da máxima curvatura modificado. Avaliou-se a massa de matéria verde de crotalária juncea, no florescimento da cultura, em ensaios de uniformidade conduzidos em duas épocas de semeadura. Em cada época foram avaliadas 4.608 UEB de 0,5×0,5m (0,25m²) e formaram-se 36 planos de UEB com tamanhos entre 0,25 e 16m². Em cada época, para cada plano de UEB, com os dados de massa de matéria verde, estimou-se o tamanho ótimo de parcela, pelo método da máxima curvatura modificado. A estimativa do tamanho ótimo de parcela depende do tamanho da unidade experimental básica. É indicado avaliar a massa de matéria verde em UEB de menor tamanho possível, para serem usadas na estimação do tamanho ótimo de parcela.

Palavras-chave:
Crotalaria juncea L.; máxima curvatura modificado; ensaios de uniformidade; planejamento experimental.

Autoria

Giovani Facco

Programa de Pós-graduação em Agronomia, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brasil.Universidade Federal de Santa MariaBrazilSanta Maria, RS, BrazilPrograma de Pós-graduação em Agronomia, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brasil.

http://orcid.org/0000-0001-5752-2377

Alberto Cargnelutti Filho

Departamento de Fitotecnia, Universidade Federal de Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brasil. Universidade Federal de Santa MariaBrazilSanta Maria, RS, BrazilDepartamento de Fitotecnia, Universidade Federal de Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brasil.

http://orcid.org/0000-0002-8608-9960

André Lavezo

http://orcid.org/0000-0003-2691-5447

Denison Esequiel Schabarum

http://orcid.org/0000-0003-0356-0276

Gabriela Görgen Chaves

http://orcid.org/0000-0001-9461-0288

Daniela Lixinski Silveira

http://orcid.org/0000-0003-0993-0100

E-mail: alberto.cargnelutti.filho@gmail.com. ^*Corresponding author.

The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

SCIMAGO INSTITUTIONS RANKINGS

Figuras | Tabelas

Figuras (1)
Tabelas (3)

Thumbnail

Figure 1
Relationship between dependent variables - CV for X equal to a basic experimental unit (BEU) (A), soil heterogeneity index (b), estimation of B (b/2), variance between plots of a BEU (V1), optimum plot size (Xo, in BEU), and optimum plot size (Xo, in m²) - with the independent variable BEU size (X, in BEU ), for the fresh matter of sunn hemp (Crotalaria juncea L.), evaluated in two sowing season.

Thumbnail

Table 1
Format of the 36 plans (basic experimental unit size, in m²) planned from 4,608 basic experimental units of 0.5×0.5m (0.25m²) of a matrix of 96 lines and 48 columns. Format the 36 sub plans and the sub plans used for each plan, for the determination of plot size by method of MEIER & LESSMAN (1971MEIER, V.D.; LESSMAN, K.J. Estimation of optimum field plot shape and size for testing yield in Crambe abyssinica Hochst. Crop Science, v.11, p.648-650, 1971. Available from: http://dx.doi.org/10.2135/cropsci1971.0011183X001100050013x>. Accessed: sept. 17, 2017.
http://dx.doi.org/10.2135/cropsci1971.00... ).

Thumbnail

Table 2
Basic experimental unit (BEU) plans with size X=X_L×X_C, in BEU and m², and respective estimates of the parameters of the functions CV(x)=A/X^B and VU(x)=V1/X^b, coefficient of determination (R²), mean of fresh matter in the plots of a BEU (m), coefficient of variation of the optimum plot size (CV_Xo, in %), optimum plot size obtained by modified maximum curvature method (Xo, in BEU; and Xo in m²) for the fresh matter of sunn hemp (Crotalaria juncea L.), evaluated at 110 days after sowing (first sowing season), in uniformity trial with 4,608 BEU of 0.5×0.5m (0.25m²).

Thumbnail

Table 3
Basic experimental unit (BEU) plans with size X=X_L×X_C, in BEU and m², and respective estimates of the parameters of the functions CV(x)=A/X^B and VU(x)=V1/X^b, coefficient of determination (R²), mean of fresh matter in the plots of a BEU (m), coefficient of variation of the optimum plot size (CV_Xo, in %), optimum plot size obtained by modified maximum curvature method (Xo, in UEB; and Xo in m²) for the fresh matter of sunn hemp (Crotalaria juncea L.), evaluated at 97 days after sowing (second sowing season), in uniformity trial with 4,608 BEU of 0.5×0.5m (0.25m²).

Figure 1 Relationship between dependent variables - CV for X equal to a basic experimental unit (BEU) (A), soil heterogeneity index (b), estimation of B (b/2), variance between plots of a BEU (V1), optimum plot size (Xo, in BEU), and optimum plot size (Xo, in m²) - with the independent variable BEU size (X, in BEU ), for the fresh matter of sunn hemp (Crotalaria juncea L.), evaluated in two sowing season.

Table 1 Format of the 36 plans (basic experimental unit size, in m²) planned from 4,608 basic experimental units of 0.5×0.5m (0.25m²) of a matrix of 96 lines and 48 columns. Format the 36 sub plans and the sub plans used for each plan, for the determination of plot size by method of MEIER & LESSMAN (1971MEIER, V.D.; LESSMAN, K.J. Estimation of optimum field plot shape and size for testing yield in Crambe abyssinica Hochst. Crop Science, v.11, p.648-650, 1971. Available from: http://dx.doi.org/10.2135/cropsci1971.0011183X001100050013x>. Accessed: sept. 17, 2017.
http://dx.doi.org/10.2135/cropsci1971.00... ).

------------Plans-----------				---Sub plans---			-----------------------------------Sub plans used in each plan----------------------------------------
Nº	X_L	X_C	m²	Nº	X_L	X_C
1	1	1	0.25	1	1	1	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, and 36
2	1	2	0.50	2	1	2	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, and 36
3	1	3	0.75	3	1	3	1, 2, 4, 6, 7, 8, 10, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 31, 32, 34, and 36
4	1	4	1.00	4	1	4	1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 31, 32, 33, 34, and 35
5	1	6	1.50	5	1	6	1, 2, 4, 6, 7, 8, 10, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 31, 32, 34, and 36
6	1	8	2.00	6	1	8	1, 2, 3, 5, 7, 8, 9, 11, 13, 14, 15, 17, 19, 20, 21, 23, 25, 26, 27, 29, 31, 32, 33, and 35
7	2	1	0.50	7	2	1	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, and 36
8	2	2	1.00	8	2	2	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, and 36
9	2	3	1.50	9	2	3	1, 2, 4, 6, 7, 8, 10, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 31, 32, 34, and 36
10	2	4	2.00	10	2	4	1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 31, 32, 33, 34, and 35
11	2	6	3.00	11	2	6	1, 2, 4, 6, 7, 8, 10, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 31, 32, 34, and 36
12	2	8	4.00	12	2	8	1, 2, 3, 5, 7, 8, 9, 11, 13, 14, 15, 17, 19, 20, 21, 23, 25, 26, 27, 29, 31, 32, 33, and 35
13	3	1	0.75	13	3	1	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 19, 20, 21, 22, 23, 24, 31, 32, 33, 34, 35, and 36
14	3	2	1.50	14	3	2	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 19, 20, 21, 22, 23, 24, 31, 32, 33, 34, 35, and 36
15	3	3	2.25	15	3	3	1, 2, 4, 6, 7, 8, 10, 12, 19, 20, 22, 24, 31, 32, 34, and 36
16	3	4	3.00	16	3	4	1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 19, 20, 21, 22, 23, 31, 32, 33, 34, and 35
17	3	6	4.50	17	3	6	1, 2, 4, 6, 7, 8, 10, 12, 19, 20, 22, 24, 31, 32, 34, and 36
18	3	8	6.00	18	3	8	1, 2, 3, 5, 7, 8, 9, 11, 19, 20, 21, 23, 31, 32, 33, and 35
19	4	1	1.00	19	4	1	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, and 36
20	4	2	2.00	20	4	2	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, and 36
21	4	3	3.00	21	4	3	1, 2, 4, 6, 7, 8, 10, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 31, 32, 34, and 36
22	4	4	4.00	22	4	4	1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 31, 32, 33, 34, and 35
23	4	6	6.00	23	4	6	1, 2, 4, 6, 7, 8, 10, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 31, 32, 34, and 36
24	4	8	8.00	24	4	8	1, 2, 3, 5, 7, 8, 9, 11, 13, 14, 15, 17, 19, 20, 21, 23, 25, 26, 27, 29, 31, 32, 33, and 35
25	6	1	1.50	25	6	1	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 19, 20, 21, 22, 23, 24, 31, 32, 33, 34, 35, and 36
26	6	2	3.00	26	6	2	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 19, 20, 21, 22, 23, 24, 31, 32, 33, 34, 35, and 36
27	6	3	4.50	27	6	3	1, 2, 4, 6, 7, 8, 10, 12, 19, 20, 22, 24, 31, 32, 34, and 36
28	6	4	6.00	28	6	4	1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 19, 20, 21, 22, 23, 31, 32, 33, 34, and 35
29	6	6	9.00	29	6	6	1, 2, 4, 6, 7, 8, 10, 12, 19, 20, 22, 24, 31, 32, 34, and 36
30	6	8	12.00	30	6	8	1, 2, 3, 5, 7, 8, 9, 11, 19, 20, 21, 23, 31, 32, 33, and 35
31	8	1	2.00	31	8	1	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, and 30
32	8	2	4.00	32	8	2	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, and 30
33	8	3	6.00	33	8	3	1, 2, 4, 6, 7, 8, 10, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, and 30
34	8	4	8.00	34	8	4	1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 25, 26, 27, 28, and 29
35	8	6	12.00	35	8	6	1, 2, 4, 6, 7, 8, 10, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, and 30
36	8	8	16.00	36	8	8	1, 2, 3, 5, 7, 8, 9, 11, 13, 14, 15, 17, 19, 20, 21, 23, 25, 26, 27, and 29

X_L - number of BEUs adjacent to the line; and X_C - number of BEUs adjacent to the column.

Table 2 Basic experimental unit (BEU) plans with size X=X_L×X_C, in BEU and m², and respective estimates of the parameters of the functions CV(x)=A/X^B and VU(x)=V1/X^b, coefficient of determination (R²), mean of fresh matter in the plots of a BEU (m), coefficient of variation of the optimum plot size (CV_Xo, in %), optimum plot size obtained by modified maximum curvature method (Xo, in BEU; and Xo in m²) for the fresh matter of sunn hemp (Crotalaria juncea L.), evaluated at 110 days after sowing (first sowing season), in uniformity trial with 4,608 BEU of 0.5×0.5m (0.25m²).

Plan	X_L	X_C	X (BEU)	X (m²)	n	A	B	R²	V1	b	R²	m	CV_Xo	Xo (BEU)	Xo (m²)
1	1	1	1	0.25	4608	51.40	0.42	0.99	307,164.17	0.84	0.99	1,078.28	21.46	7.91	1.98
2	1	2	2	0.5	2304	37.98	0.38	0.96	670,893.64	0.77	0.96	2,156.55	18.83	6.22	3.11
3	1	3	3	0.75	1536	32.47	0.38	0.94	1,103,572.94	0.75	0.94	3,234.83	17.09	5.52	4.14
4	1	4	4	1	1152	29.67	0.36	0.93	1,637,994.44	0.73	0.93	4,313.11	16.39	5.10	5.10
5	1	6	6	1.5	768	26.13	0.37	0.91	2,858,065.66	0.73	0.91	6,469.66	14.89	4.66	6.99
6	1	8	8	2	576	24.43	0.36	0.91	4,440,524.47	0.73	0.91	8,626.22	14.19	4.43	8.86
7	2	1	2	0.5	2304	36.27	0.39	0.98	611,863.77	0.77	0.98	2,156.55	18.17	6.03	3.01
8	2	2	4	1	1152	26.88	0.34	0.94	1,344,445.95	0.68	0.94	4,313.11	15.98	4.61	4.61
9	2	3	6	1.5	768	23.42	0.34	0.93	2,295,049.12	0.68	0.93	6,469.66	14.48	4.14	6.22
10	2	4	8	2	576	21.12	0.32	0.89	3,319,810.07	0.63	0.89	8,626.22	13.98	3.70	7.40
11	2	6	12	3	384	18.98	0.33	0.89	6,032,868.25	0.67	0.89	12,939.33	12.47	3.52	10.56
12	2	8	16	4	288	18.05	0.34	0.87	9,699,229.86	0.67	0.87	17,252.43	11.95	3.40	13.62
13	3	1	3	0.75	1536	29.35	0.35	0.98	901,419.70	0.70	0.98	3,234.83	16.78	4.97	3.73
14	3	2	6	1.5	768	21.66	0.29	0.97	1,964,566.66	0.58	0.97	6,469.66	14.92	3.60	5.41
15	3	3	9	2.25	512	18.81	0.28	0.98	3,331,196.20	0.56	0.98	9,704.49	13.63	3.16	7.10
16	3	4	12	3	384	17.18	0.26	0.95	4,938,793.23	0.52	0.95	12,939.33	13.15	2.80	8.40
17	3	6	18	4.5	256	15.41	0.28	0.96	8,940,137.27	0.55	0.96	19,408.99	11.73	2.68	12.05
18	3	8	24	6	192	14.56	0.27	0.92	14,198,743.66	0.54	0.92	25,878.65	11.35	2.52	15.12
19	4	1	4	1	1152	25.30	0.32	0.97	1,190,482.16	0.64	0.97	4,313.11	15.91	4.27	4.27
20	4	2	8	2	576	18.55	0.26	0.95	2,560,076.87	0.52	0.95	8,626.22	13.97	2.98	5.95
21	4	3	12	3	384	16.29	0.25	0.96	4,440,234.53	0.50	0.96	12,939.33	12.80	2.62	7.86
22	4	4	16	4	288	14.33	0.21	0.95	6,110,593.87	0.42	0.95	17,252.43	12.26	2.09	8.34
23	4	6	24	6	192	12.99	0.24	0.91	11,305,122.13	0.48	0.91	25,878.65	10.86	2.11	12.68
24	4	8	32	8	144	12.26	0.23	0.82	17,907,086.47	0.46	0.82	34,504.87	10.52	1.95	15.61
25	6	1	6	1.5	768	21.74	0.30	0.97	1,978,072.51	0.59	0.97	6,469.66	14.79	3.66	5.49
26	6	2	12	3	384	16.44	0.24	0.96	4,527,196.18	0.48	0.96	12,939.33	13.10	2.57	7.70
27	6	3	18	4.5	256	14.54	0.23	0.97	7,959,478.23	0.47	0.97	19,408.99	12.00	2.27	10.23
28	6	4	24	6	192	13.18	0.20	0.95	11,639,559.67	0.41	0.95	25,878.65	11.57	1.89	11.35
29	6	6	36	9	128	11.99	0.24	0.92	21,650,301.07	0.47	0.92	38,817.98	10.22	1.96	17.67
30	6	8	48	12	96	11.38	0.23	0.81	34,716,602.70	0.45	0.81	51,757.30	9.96	1.81	21.73
31	8	1	8	2	576	19.51	0.28	0.97	2,832,197.11	0.56	0.97	8,626.22	14.07	3.24	6.47
32	8	2	16	4	288	14.81	0.22	0.95	6,530,409.78	0.44	0.95	17,252.43	12.45	2.20	8.82
33	8	3	24	6	192	13.36	0.22	0.95	11,954,897.80	0.44	0.95	25,878.65	11.48	2.01	12.05
34	8	4	32	8	144	11.99	0.18	0.92	17,126,143.68	0.36	0.92	34,504.87	11.03	1.59	12.70
35	8	6	48	12	96	11.02	0.22	0.84	32,536,358.75	0.44	0.84	51,757.30	9.76	1.73	20.82
36	8	8	64	16	72	10.70	0.22	0.73	54,567,511.67	0.44	0.73	69,009.74	9.52	1.70	27.20

X_L - number of BEUs adjacent to the line; X_C - number of BEUs adjacent to the column; and n - number of plots with X BEU of size (n=4,608/X).

Table 3 Basic experimental unit (BEU) plans with size X=X_L×X_C, in BEU and m², and respective estimates of the parameters of the functions CV(x)=A/X^B and VU(x)=V1/X^b, coefficient of determination (R²), mean of fresh matter in the plots of a BEU (m), coefficient of variation of the optimum plot size (CV_Xo, in %), optimum plot size obtained by modified maximum curvature method (Xo, in UEB; and Xo in m²) for the fresh matter of sunn hemp (Crotalaria juncea L.), evaluated at 97 days after sowing (second sowing season), in uniformity trial with 4,608 BEU of 0.5×0.5m (0.25m²).

Plan	X_L	X_C	X (UEB)	X (m²)	n	A	B	R²	V1	b	R²	m	CV_Xo	Xo (UEB)	Xo (m²)
1	1	1	1	0.25	4608	44.10	0.39	0.99	151,998.96	0.78	0.99	884.11	20.74	6.96	1.74
2	1	2	2	0.5	2304	33.29	0.36	0.97	346,507.13	0.73	0.97	1,768.22	17.85	5.55	2.78
3	1	3	3	0.75	1536	28.55	0.35	0.96	573,468.66	0.71	0.96	2,652.33	16.30	4.90	3.67
4	1	4	4	1	1152	26.46	0.36	0.95	875,625.54	0.71	0.95	3,536.44	15.31	4.65	4.65
5	1	6	6	1.5	768	23.06	0.34	0.93	1,496,130.72	0.68	0.93	5,304.66	14.30	4.10	6.15
6	1	8	8	2	576	21.53	0.35	0.91	2,318,682.05	0.70	0.91	7,072.88	13.33	3.95	7.90
7	2	1	2	0.5	2304	32.09	0.36	0.98	321,974.63	0.71	0.98	1,768.22	17.69	5.35	2.68
8	2	2	4	1	1152	23.94	0.32	0.97	716,750.03	0.65	0.97	3,536.44	15.14	4.12	4.12
9	2	3	6	1.5	768	20.49	0.31	0.96	1,180,959.77	0.61	0.96	5,304.66	13.88	3.56	5.34
10	2	4	8	2	576	18.70	0.30	0.95	1,750,165.95	0.61	0.95	7,072.88	13.03	3.30	6.60
11	2	6	12	3	384	16.33	0.28	0.94	3,000,212.26	0.57	0.94	10,609.32	12.13	2.85	8.55
12	2	8	16	4	288	14.84	0.28	0.91	4,406,605.15	0.56	0.91	14,145.76	11.37	2.61	10.44
13	3	1	3	0.75	1536	27.83	0.34	0.98	544,847.62	0.67	0.98	2,652.33	16.50	4.71	3.53
14	3	2	6	1.5	768	21.11	0.31	0.98	1,253,527.48	0.61	0.98	5,304.66	14.24	3.63	5.45
15	3	3	9	2.25	512	18.21	0.29	0.97	2,099,054.36	0.58	0.97	7,956.99	13.11	3.13	7.04
16	3	4	12	3	384	16.63	0.28	0.96	3,111,475.67	0.56	0.96	10,609.32	12.39	2.86	8.59
17	3	6	18	4.5	256	14.64	0.26	0.94	5,424,470.09	0.51	0.94	15,913.98	11.62	2.45	11.02
18	3	8	24	6	192	13.36	0.25	0.91	8,040,135.49	0.50	0.91	21,218.64	10.95	2.22	13.34
19	4	1	4	1	1152	23.67	0.30	0.93	700,506.72	0.60	0.93	3,536.44	15.77	3.91	3.91
20	4	2	8	2	576	17.47	0.25	0.92	1,527,237.84	0.51	0.92	7,072.88	13.48	2.79	5.58
21	4	3	12	3	384	15.06	0.23	0.94	2,552,233.93	0.46	0.94	10,609.32	12.42	2.31	6.93
22	4	4	16	4	288	13.46	0.21	0.89	3,627,807.26	0.42	0.89	14,145.76	11.65	1.98	7.92
23	4	6	24	6	192	11.87	0.19	0.90	6,348,929.67	0.38	0.90	21,218.64	10.82	1.63	9.80
24	4	8	32	8	144	10.47	0.16	0.89	8,777,026.91	0.32	0.89	28,291.51	10.09	1.26	10.11
25	6	1	6	1.5	768	21.23	0.30	0.96	1,268,098.55	0.60	0.96	5,304.66	14.46	3.61	5.41
26	6	2	12	3	384	16.14	0.26	0.95	2,933,900.95	0.53	0.95	10,609.32	12.42	2.70	8.09
27	6	3	18	4.5	256	13.81	0.24	0.97	4,831,672.58	0.47	0.97	15,913.98	11.45	2.20	9.92
28	6	4	24	6	192	12.71	0.23	0.93	7,273,479.26	0.46	0.93	21,218.64	10.79	2.03	12.17
29	6	6	36	9	128	11.11	0.20	0.96	12,501,275.67	0.40	0.96	31,827.95	10.10	1.61	14.49
30	6	8	48	12	96	10.02	0.18	0.95	18,074,138.46	0.36	0.95	42,437.27	9.47	1.36	16.37
31	8	1	8	2	576	19.59	0.28	0.93	1,920,508.04	0.56	0.93	7,072.88	14.05	3.27	6.53
32	8	2	16	4	288	14.78	0.24	0.90	4,370,570.80	0.47	0.90	14,145.76	12.11	2.32	9.29
33	8	3	24	6	192	12.80	0.21	0.91	7,380,395.85	0.42	0.91	21,218.64	11.19	1.89	11.35
34	8	4	32	8	144	11.73	0.20	0.83	11,021,388.03	0.40	0.83	28,291.51	10.56	1.69	13.55
35	8	6	48	12	96	10.23	0.16	0.83	18,848,345.24	0.32	0.83	42,437.27	9.87	1.25	14.98
36	8	8	64	16	72	9.17	0.14	0.77	26,934,403.39	0.27	0.77	56,583.03	9.20	0.97	15.59

X_L - number of BEUs adjacent to the line; X_C - number of BEUs adjacent to the column; and n - number of plots with X BEU of size (n=4,608/X).

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Universidade Federal de Santa Maria Universidade Federal de Santa Maria, Centro de Ciências Rurais , 97105-900 Santa Maria RS Brazil , Tel.: +55 55 3220-8698 , Fax: +55 55 3220-8695 - Santa Maria - RS - Brazil
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[1] E-mail: alberto.cargnelutti.filho@gmail.com. ^*Corresponding author.