Title:	Agricultural soybean and corn calendar based on moderate resolution satellite images for southern Brazil.
Authors:	BECKER, W. R. RICHETTI, J. MERCANTE, E. ESQUERDO, J. C. D. M. SILVA JUNIOR, C. A. da PALUDO, A. JOHANN, J. A.
Affiliation:	WILLYAN RONALDO BECKER, Unioeste; JONATHAN RICHETTI, Unioeste; ERIVELTO MERCANTE, Unioeste; JULIO CESAR DALLA MORA ESQUERDO, CNPTIA; CARLOS ANTONIO DA SILVA JUNIOR, Unemat; ALEX PALUDO, Unioeste; JERRY ADRIANI JOHANN, Unioeste.
Date Issued:	2020
Citation:	Semina: Ciências Agrárias, v. 41, n. 5, p. 2419-2428, 2020.
Description:	Abstract. Knowledge of the agricultural calendar of crops is essential to better estimate and forecast the cultivation of large-scale crops. The aim of this study was to estimate sowing date (SD), date of maximum vegetative development (DMVD), and harvest date (HD) of soybean and corn in the state of Paraná, Brazil. Dates from 120 farms and the Enhanced Vegetation Index (EVI) from the Moderate Resolution Imaging Spectroradiometer (MODIS) from 2011 to 2014 were used into a seasonal trend analysis to obtain soybean and corn seasonal patterns. The results indicate that the majority soybean is sown during October and the DMVD occurs between the second ten-day period of December and the first ten-day period of January. Owing to the spatial variability of the SD, the difference in the maturation cycles of the cultivars, and regional climatic variation, the HD of soybean varied greatly during the studied crop years, ranging from mid-February to late March. The SD of corn is before that of soybean, and mainly occurs in late September to mid-October. The DMVD mainly occurs during December, and the HD is distributed throughout January to March in Paraná. When comparing the estimated dates with observed dates the mean error (ME) varied from 0.2 days earlier to 3.3 days after the observed date for soybean with root mean square error (RMSE) from 1.93 to 14.73 days. For corn, the ME varied from 10.3 days to 18.5 days after the observed date with RMSE from 18.02 to 27.82 days.
Thesagro:	Soja Milho
NAL Thesaurus:	Vegetation index Soybeans Corn Sowing date Harvest date
Keywords:	Índice de vegetação melhorado Índice de Vegetação Aprimorado Data de Colheita Data de Semeadura Enhanced Vegetation Index Timesat
DOI:	10.5433/1679-0359.2020v41n5Supl1p2419
Notes:	Suplemento 1.
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPTIA)