Mapping of yield, economic return, soil electrical conductivity, and management zones of irrigated corn for silage

Authors

  • Alberto Carlos de Campos Bernardi Embrapa Pecuária Sudeste, Rodovia Washington Luiz, Km 234, s/no, Fazenda Canchim, Caixa Postal 339, CEP 13560-970 São Carlos, SP.
  • Oscar Tupy Embrapa Pecuária Sudeste, Rodovia Washington Luiz, Km 234, s/no, Fazenda Canchim, Caixa Postal 339, CEP 13560-970 São Carlos, SP.
  • Karoline Eduardo Lima Santos Atvos, Avenida Alexander Grahan Bell, no 200, Bloco D, Condomínio Grahan Bell, CEP 13069-310 Campinas, SP.
  • Giulia Guillen Mazzuco Universidade Federal de São Carlos, Programa de Pós-Graduação em Engenharia Urbana, Rodovia Washington Luís, Km 235, CEP 13565-905 São Carlos, SP.
  • Giovana Maranhão Bettiol Embrapa Cerrados, Rodovia BR-020, Km 18, Caixa Postal 08223, CEP 73310-970 Planaltina, DF.
  • Ladislau Marcelino Rabello Embrapa Instrumentação, Rua XV de Novembro, no 1.452, Centro, Caixa Postal 741, CEP 13560-970 São Carlos, SP.
  • Ricardo Yassushi Inamasu Embrapa Instrumentação, Rua XV de Novembro, no 1.452, Centro, Caixa Postal 741, CEP 13560-970 São Carlos, SP.

DOI:

https://doi.org/10.1590/S1678-3921.pab2018.v53.25498

Keywords:

Zea mays, economic return, management zones, soil electrical conductivity, temporal stability, yield maps

Abstract

The objective of this work was to evaluate the spatial and temporal variability of the dry matter yield of irrigated corn for silage, as well as its economic return. The study was conducted in an irrigated silage corn field of 18.9 ha in the municipality of São Carlos, in the state of São Paulo, Brazil. The spatial variability of the yield of three crop seasons, normalized yield indexes, production cost, profit, and soil electrical conductivity (EC) were modeled using semivariograms. Yield maps were obtained by kriging, and management zones were mapped based on average yield, normalized index, and EC. The results showed a structured spatial variability of corn yield, production cost, profit, and soil EC within the irrigated area. The adopted precision agriculture tools were useful to indicate zones of higher yield and economic return. The sequences of yield maps and the analysis of spatial and temporal variability allow the definition of management zones, and soil EC is positively related to corn yield.

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Published

2018-12-28

How to Cite

Bernardi, A. C. de C., Tupy, O., Santos, K. E. L., Mazzuco, G. G., Bettiol, G. M., Rabello, L. M., & Inamasu, R. Y. (2018). Mapping of yield, economic return, soil electrical conductivity, and management zones of irrigated corn for silage. Pesquisa Agropecuaria Brasileira, 53(12), 1289–1298. https://doi.org/10.1590/S1678-3921.pab2018.v53.25498

Issue

v.53, n.12, dez. 2018

Section

PRECISION AGRICULTURE