An uniformity trial (experiment without treatments, which the crop and all procedures performed during the experiment are homogeneous in the experimental area) was conducted with flax (Linum usitatissimum L.), cultivar CDC Normandy, in experimental area of 15 m x 15 m (225 [m.sup.2]) located in southern Brazil at 29[degrees]42'S, 53[degrees]49'W, with 95m altitude.
In the uniformity trial, the central area of size 12 m x 12 m (144 [m.sup.2]) was divided into 144 basic experimental units (BEU) of 1.00 m x 1.00 m forming a matrix with 12 rows and 12 columns.
In each sowing season, at the center of the uniformity trial, an area of 48x24m (1,152[m.sup.2]) was demarcated.
Size of the BEU should be as small as possible to avoid overestimating the optimum plot size, since the optimum plot size is influenced by the uniformity trial size (STORCK et al., 2006).
Each uniformity trial
with size of 6 x 4 m (24 [m.sup.2]) was divided into 24 basic experimental units (BEU) of 1 x 1 m (1 [m.sup.2]) forming a matrix of six rows and four columns.
A uniformity trial
was conducted from 2003 to 2005 with corn grown on all plots according to the standard no-tillage system with recommended fertilizer and herbicide inputs.
The study was carried out with data from an uniformity trial
with cherry tomato cv.
A soybean uniformity trial
was grown at the Jiangpu Farm of Nanjing Agricultural University.
consist of experiments where dummy treatments are applied and various parameters arc measured to evaluate the inherent variation present within the experimental area (Hinkelmann and Kempthorne, 1994).
Ninety-six uniformity trials
were conducted with the oat crop (Avena sativa L.) in an experimental area of 90 x 60 m (5,400 [m.sup.2]), from the Department of Phytotechny of the Santa Maria Federal University, Santa Maria, State of Rio Grande do Sul, located at 29[degrees]42'S, 53[degrees]49'W and 95 m high, in the agricultural year of 2014.
Two kits for water distribution uniformity trials
(Fabrimar') were used, which consisted of: 300 pluviometers made of engineering plastic for water collection; 10 graduated cylinders made of transparent thermoplastic, with scale of 0.5 mm, from 0 to 15 mm; 300 bars made of structural aluminum, for the support and fixation of the collectors on the ground.
One of the alternatives to evaluate the experimental area is the use of uniformity tests, also known as uniformity trials
, where the area is cultivated throughout the length with a certain species and identical cultural practices, without applying treatments.