|
|
|
|
|
| Bernardi,Alberto Carlos de Campos; Pitrat,Thomas; Rabello,Ladislau Marcelino; Pezzopane,José Ricardo Macedo; Bosi,Cristiam; Mazzuco,Giulia Guillen; Bettio,Giovana Maranhão. |
| Abstract: The objective of this work was to characterize the spatial variability of soil electrical resistivity due to different soil moisture contents, in an integrated agricultural system. Soil electrical resistivity (ER) was measured with the Automatic Resistivity Profiling (ARP) contact sensor in two dates, in 2016, in a 9.7-ha area with different soil moisture contents. The obtained maps indicated that ER allowed delimiting the regions within the study area and pointing out differences in the movement and accumulation of water in the soil horizons. Although there is a trend of reduction in ER values with increasing soil moisture, the spatial correlation structure of ER is similar. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: ARP system; Soil sensor; Soil water content. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000100601 |
| |
|
|
| Bernardi,Alberto Carlos de Campos; Tupy,Oscar; Santos,Karoline Eduarda Lima; Mazzuco,Giulia Guillen; Bettiol,Giovana Maranhão; Rabello,Ladislau Marcelino; Inamasu,Ricardo Yassushi. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Economic return; Management zones; Soil electrical conductivity; Temporal stability; Yield maps. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001201289 |
| |
|
|
| Rabello,Ladislau Marcelino; Cruvinel,Paulo Estevão. |
| This contribution introduces an instrument for decision-making in agricultural processes based on the measurements and mapping of soil resistance to root penetration. Its development was based on a new and advanced instrumentation tool, enabling in almost real-time to acquire the necessary information for spatial variability analysis of plant root penetration resistance in soils, due to natural or artificial soil compaction processes, i.e., not only for an area of soil but also for a soil profile. The system allows soil resistance assays for both laboratory and agricultural fields. Moreover, the development focused on an intelligent instrumentation concept, as well as a microprobe (30º for the spire angle, 1,6 mm for the base diameter, and 30 mm of total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural instrumentation; Intelligent systems; Signal processing; Soil microprobe; Soil penetrometer. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000500001 |
| |
|
|
|
