Weather conditions favorable for agricultural spraying in Rio Grande do Sul State

Radons, Sidinei Z.; Heldwein, Arno B.; Silva, Jocélia R. da; Silva, Atawana V. da; Schepke, Eduardo; Lucas, Dionéia D. P.

doi:10.1590/1807-1929/agriambi.v26n1p36-43

Acessibilidade / Reportar erro

Brasil

Revista Brasileira de Engenharia Agrícola e Ambiental

Español English

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Articles • Rev. bras. eng. agríc. ambient. 26 (1) • Jan 2022 • https://doi.org/10.1590/1807-1929/agriambi.v26n1p36-43 copy

Weather conditions favorable for agricultural spraying in Rio Grande do Sul State¹ 1 Research developed at Universidade Federal da Fronteira Sul Campus Cerro Largo and Universidade Federal de Santa Maria, RS, Brazil

Condições meteorológicas favoráveis para pulverização agrícola no Estado do Rio Grande do Sul

Authorship SCIMAGO INSTITUTIONS RANKINGS

HIGHLIGHTS:

Altitude showed a moderate negative correlation with wind speed favorability.

Air temperature was the meteorological element with greatest favorability for agricultural spra-ying in the Rio Grande do Sul State.

The range of the most favorable times for agricultural spraying occurred from 6:00 p.m. to 11:00 a.m.

ABSTRACT

Knowledge of the periods when the meteorological conditions are favorable for agricultural spraying is important in agricultural planning, particularly in fleet dimensioning. This study aimed to determine, on a temporal scale, favorable weather conditions for agricultural spraying in Rio Grande do Sul State, Brazil. In addition, the times and months of the year that have the most and least suitable conditions for agricultural spraying were investigated, as well as the meteorological conditions that are frequently limiting and their relationships with the geographic coordinates and altitude of the location. Hourly data from automatic weather stations in 12 locations were collected, totaling 56,500 days and 1,356,009 hourly observations. Wind speeds greater than 3 km h^-1 and less than 10 km h^-1, air temperatures up to 30 °C, and relative air humidity above 55% were considered favorable. The data were released after descriptive analysis considering the registered frequency and mean. Altitude showed a moderate negative correlation with wind speed favorability. Air temperature was the meteorological element with the greatest favorability for agricultural spraying in the Rio Grande do Sul State, whereas wind speed was the most limiting meteorological element. There were no differences in favorability between the months of the year. The most favorable times were from 6:00 p.m. to 11:00 a.m. and the most unfavorable from 12:00 p.m. to 5:00 p.m. Considering the condition in which air temperature, wind speed, and relative air humidity were adequate for agricultural spraying simultaneously in the Rio Grande do Sul State, 43.2% of the periods were favorable.

Key words:
application technology; pesticides; air temperature; relative air humidity; wind speed

Location	Altitude (m)	Latitude	Longitude	Opening date	Errors (%)	Operational days
Bento Gonçalves	623	-29.16°	-51.53	12/01/06	3.8	4,596
Camaquã	92	-30.81°	-51.83°	12/12/06	5.5	4,505
Cruz Alta	427	-28.60°	-53.67°	05/31/07	2.6	4,476
Jaguarão	31	-32.53°	-53.38°	01/09/07	4.4	4,532
Lagoa Vermelha	834	-28.22°	-51.51°	03/02/07	3.0	4,545
Passo Fundo	681	-28.23°	-52.40°	11/27/06	1.0	4,732
Rio Pardo	107	-29.87°	-52.38°	10/01/06	7.4	4,482
Santa Maria	103	-29.72°	-53.72°	11/27/01	12.9	5,757
Santana do Livramento	328	-30.84°	-55.61°	11/22/01	22.0	5,159
Santo Augusto	490	-27.85°	-53.79°	12/05/01	21.3	5,196
São Luiz Gonzaga	246	-28.42°	-54.96°	07/25/07	11.3	4,028
Uruguaiana	74	-29.84°	-57.08°	09/28/06	7.2	4,491

Factor	Air temperature	Wind speed > 10	Wind speed < 3	Relative air humidity	General
Factor	(n = 12)
Altitude	0.541^ns	-0.602*	0.502^ns	-0.092^ns	-0.029^ns
Latitude	-0.094^ns	-0.362^ns	0.328^ns	-0.485^ns	-0.065^ns
Longitude	0.750**	0.206^ns	-0.103^ns	0.716**	0.320^ns

Location	Air temperature	Wind speed > 10	Wind speed < 3	Relative air humidity	General
Bento Gonçalves	0.991 a	0.707 d	0.906 b	0.902 b	0.544 a
Camaquã	0.978 a	0.963 a	0.403 f	0.936 a	0.323 d
Cruz Alta	0.969 b	0.654 e	0.660 e	0.843 c	0.250 e
Jaguarão	0.983 a	0.689 e	0.816 d	0.907 b	0.461 b
Lagoa Vermelha	0.994 a	0.600 f	0.974 a	0.864 c	0.489 b
Passo Fundo	0.989 a	0.547 g	0.907 b	0.869 c	0.385 c
Rio Pardo	0.964 b	0.777 c	0.849 c	0.891 b	0.558 a
Santa Maria	0.955 b	0.862 b	0.769 d	0.876 c	0.543 a
Santana do Livramento	0.972 b	0.654 e	0.920 b	0.814 d	0.421 b
Santo Augusto	0.967 b	0.683 e	0.863 c	0.763 e	0.401 c
São Luiz Gonzaga	0.919 c	0.741 d	0.884 c	0.759 e	0.471 b
Uruguaiana	0.933 c	0.626 f	0.801 d	0.792 d	0.332 d
General mean	0.968	0.709	0.813	0.852	0.432
CV (%)	1.62	4.82	5.81	3.53	11.99

Local time	Air temperature	Wind speed > 10	Wind speed < 3	Relative air humidity	General
12:00 a.m.	1.000 a	0.740 a	0.774 a	0.974 a	0.487 a
1:00 a.m.	1.000 a	0.745 a	0.766 a	0.981 a	0.484 a
2:00 a.m.	1.000 a	0.749 a	0.757 a	0.985 a	0.479 a
3:00 a.m.	1.000 a	0.752 a	0.752 a	0.988 a	0.479 a
4:00 a.m.	1.000 a	0.757 a	0.748 a	0.990 a	0.480 a
5:00 a.m.	1.000 a	0.757 a	0.745 a	0.991 a	0.477 a
6:00 a.m.	1.000 a	0.757 a	0.744 a	0.993 a	0.480 a
7:00 a.m.	1.000 a	0.740 a	0.763 a	0.992 a	0.482 a
8:00 a.m.	0.999 a	0.691 b	0.802 a	0.983 a	0.474 a
9:00 a.m.	0.996 a	0.641 c	0.846 a	0.953 a	0.462 a
10:00 a.m.	0.983 b	0.625 c	0.874 a	0.893 b	0.448 a
11:00 a.m.	0.959 b	0.621 c	0.894 a	0.802 c	0.418 a
12:00 p.m.	0.931 c	0.633 c	0.903 a	0.702 d	0.378 b
1:00 p.m.	0.903 d	0.640 c	0.906 a	0.619 e	0.338 b
2:00 p.m.	0.885 e	0.641 c	0.904 a	0.567 f	0.308 b
3:00 p.m.	0.878 e	0.647 c	0.897 a	0.549 f	0.296 b
4:00 p.m.	0.887 e	0.657 c	0.883 a	0.567 f	0.304 b
5:00 p.m.	0.909 d	0.690 b	0.854 a	0.624 e	0.337 b
6:00 p.m.	0.940 c	0.746 a	0.810 a	0.729 d	0.396 a
7:00 p.m.	0.976 b	0.782 a	0.776 a	0.833 c	0.445 a
8:00 p.m.	0.993 a	0.774 a	0.772 a	0.895 b	0.468 a
9:00 p.m.	0.997 a	0.752 a	0.779 a	0.930 a	0.475 a
10:00 p.m.	0.999 a	0.739 a	0.779 a	0.951 a	0.477 a
11:00 p.m.	0.999 a	0.736 a	0.777 a	0.964 a	0.482 a
CV (%)	1.62	4.82	11.7	3.53	14.84

Months	Air temperature	Wind speed > 10	Wind speed < 3	Relative air humidity	General
January	0.913 c	0.716 b	0.855 a	0.842 c	0.432 a
February	0.925 c	0.753 a	0.851 a	0.867 c	0.454 a
March	0.964 b	0.763 a	0.846 a	0.861 c	0.457 a
April	0.982 a	0.786 a	0.839 a	0.844 c	0.454 a
May	0.999 a	0.767 a	0.828 a	0.923 a	0.480 a
June	1.000 a	0.747 a	0.824 a	0.933 a	0.479 a
July	1.000 a	0.718 b	0.803 a	0.897 b	0.447 a
August	0.995 a	0.646 d	0.793 a	0.862 c	0.412 a
September	0.990 a	0.636 d	0.784 a	0.851 c	0.411 a
October	0.984 a	0.632 d	0.777 a	0.845 c	0.406 a
November	0.956 b	0.648 d	0.776 a	0.747 d	0.365 a
December	0.913 c	0.695 c	0.774 a	0.763 d	0.388 a
CV (%)	1.23	2.19	10.81	1.80	12.92

Unidade Acadêmica de Engenharia Agrícola Unidade Acadêmica de Engenharia Agrícola, UFCG, Av. Aprígio Veloso 882, Bodocongó, Bloco CM, 1º andar, CEP 58429-140, Campina Grande, PB, Brasil, Tel. +55 83 2101 1056 - Campina Grande - PB - Brazil
E-mail: revistagriambi@gmail.com

Acompanhe os números deste periódico no seu leitor de RSS

[1] * Corresponding author - E-mail: joceliarosa.s@gmail.com

Brasil

Brasil

Weather conditions favorable for agricultural spraying in Rio Grande do Sul State1 1 Research developed at Universidade Federal da Fronteira Sul Campus Cerro Largo and Universidade Federal de Santa Maria, RS, Brazil

Condições meteorológicas favoráveis para pulverização agrícola no Estado do Rio Grande do Sul

HIGHLIGHTS:

ABSTRACT

Weather conditions favorable for agricultural spraying in Rio Grande do Sul State¹ 1 Research developed at Universidade Federal da Fronteira Sul Campus Cerro Largo and Universidade Federal de Santa Maria, RS, Brazil