Basic experimental unit and plot sizes for fresh matter of sunn hemp

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

doi:10.1590/0103-8478cr20170660

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

Basic experimental unit and plot sizes for fresh matter of sunn hemp

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

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT:

This study aimed to verify the influence of the basic experimental unit (BEU) size in the estimation of the optimum plot size to evaluate the fresh matter of sunn hemp (Crotalaria juncea L.) using the modified maximum curvature method. The fresh matter of sunn hemp was evaluated in uniformity trials in two sowing season in flowering. In each sowing season, 4,608 BEUs of 0.5×0.5m (0.25m²) were evaluated and 36 BEU plans were formed with sizes from 0.25 to 16m². In each evaluation period for each BEU plan, using fresh matter data, optimum plot size was estimated through the modified maximum curvature method. Estimation of the optimum plot size depends on the BEU size. Assessing fresh matter in BEUs that are as small as possible is recommended in order to use it to estimate the optimum plot size.

Key words:
Crotalaria juncea L.; modified maximum curvature; uniformity trials; experimental planing.

Authorship

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.

https://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.

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

André Lavezo

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

Denison Esequiel Schabarum

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

Gabriela Görgen Chaves

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

Daniela Lixinski Silveira

https://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

Figures | Tables

Figures (1)
Tables (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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Basic experimental unit and plot sizes for fresh matter of sunn hemp

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