SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Banerjee, Swagata (Ban); Martin, Steven W.; Roberts, Roland K.; Larkin, Sherry L.; Larson, James A.; Paxton, Kenneth W.; English, Burton C.; Marra, Michele C.; Reeves, Jeanne M..

Binary logit analysis was used to identify the factors influencing adoption of Global Positioning System (GPS) guidance systems by cotton farmers in 11 Mid-south and Southeastern states. Results indicate that adoption was more likely by those who had already adopted other precision-farming practices and had used computers for farm management. In addition, younger and more affluent farmers were more likely to adopt. Farmers with larger farms and with relatively high yields were also more likely to adopt. Education was not a significant factor in a farmer’s decision to adopt GPS guidance systems.

Tipo: Journal Article

Palavras-chave: Binary logit; Cotton; GPS guidance system; Marginal effect; Precision farming; Technology adoption; Agribusiness; Crop Production/Industries; Q2; Q16; Q19; Q20; Q24.

Ano: 2008

URL: http://purl.umn.edu/45530

A precíziós gazdálkodás terjedésének vizsgálata

A precíziós növénytermelés externális hatásai az Agárdi Farm Kft. esetében

Kalmar, Sandor.

A precíziós gazdálkodás – 90-es évek közepétől kezdődő – alkalmazását követően napjainkban is megválaszolásra vár a beruházás megtérülési idejének és a területnagyságnak az összefüggése. Megállapítható, hogy a beruházás az eszközök gyors avulását figyelembe véve, 3 éves megtérülés esetén, 3 millió Ft (áfával együtt) értékű eszközberuházás, 21 140 Ft/ha inputfelhasználás és 5%-os megtakarítási szint mellett 946 ha-on térülhet meg az inputanyag-megtakarításból. Természetesen több végeredmény is lehetséges a változók függvényében. -------------------------------------- Ever since precision farming was introduced in the mid-nineties, correlations between payback period and area size have been unexplored. It was found that – taking into account the quick...

Tipo: Journal Article

Palavras-chave: Precíziós gazdálkodás; Innováció terjedése; Ökonómiai modell; Precision farming; Spreading of innovation; Economic model; Crop Production/Industries; Farm Management; Research and Development/Tech Change/Emerging Technologies.

Ano: 2009

URL: http://purl.umn.edu/92531

Adoption of Site-Specific Information and Variable-Rate Technologies in Cotton Precision Farming

Sinka, Anett.

A hagyományos mezőgazdasági termelés negatív hatásainak kiküszöbölése ér¬dekében az Európai Unió országaiban az utóbbi évtizedben egyre fontosabbá vált a multifunkcionális mezőgazdaság. Ahhoz, hogy a vidékfejlesztés, a környezetgazdálkodás az agrárgazdaság integrált részévé váljék, a gazdasági gyakorlatnak szá¬mos területen szükséges változtatni: merőben új módszerek alkalmazása, a koráb¬ban használt vagy meglévő technológiák megújítása, mások által már kipróbált eljá¬rások adaptálása, mind-mind egy-egy lehetőséget kínál a jól működő, többfunkciós mezőgazdasághoz. Mindezen okok mérlegelése után döntött úgy az Agárdi Farm Kft., hogy átáll a ha¬gyományos gazdálkodásról a precíziós növénytermelésre. A precíziós növényterme¬lési technológia nem más, mint a...

Tipo: Journal Article

Palavras-chave: Externáliák; Multifunkcionális mezőgazdaság; Precíziós növénytermelés; Versenyképesség; Externalities; Multifunctional agriculture; Precision farming; Competitiveness; Crop Production/Industries; Farm Management.

Ano: 2009

URL: http://purl.umn.edu/92499

Roberts, Roland K.; English, Burton C.; Larson, James A.; Cochran, Rebecca L.; Goodman, W. Robert; Larkin, Sherry L.; Marra, Michele C.; Martin, Steven W.; Shurley, W. Donald; Reeves, Jeanne M..

Probit analysis identified factors that influence the adoption of precision farming technologies by Southeastern cotton farmers. Younger, more educated farmer who operated larger farms and were optimistic about the future of precision farming were most likely to adopt site-specific information technology. The probability of adopting variable-rate input application technology was higher for younger farmers who operated larger farms, owned more of the land they farmed, were more informed about the costs and benefits of precision farming, and were optimistic about the future of precision farming. Computer use was not important, possibly because custom hiring shifts the burden of computer use to agribusiness firms.

Tipo: Journal Article

Palavras-chave: Cotton; Grid soil sampling; Precision farming; Probit; Sample selection; Site-specific information; Technology adoption; Variable-rate application; D21; Q12; Q16.

Ano: 2004

URL: http://purl.umn.edu/42943

Agricultura de precisão: possibilidades de manejo da adubação nitrogenada para o milho no Cerrado.

Amostragem em Grid e imagens aéreas: métodos para estudos da distribuição espacial de corós em soja sob plantio direto no cerrado.

HURTADO, S. M. C.; RESENDE, A. V. de; SILVA, C. A.; CORAZZA, E. J.; SHIRATSUCHI, L. S..

Altas produtividades de milho são dependentes da interação de fatores como clima, solo e manejo. O manejo da adubação nitrogenada é um dos principais condicionantes da produtividade, pela complexa dinâmica do nitrogênio (N) nos sistemas agrícolas. É com base nessa dinâmica que se busca estimar o potencial de suprimento de N pelo solo e o seu aproveitamento pela cultura, o que possibilita definir as recomendações de adubação. Contudo, a maioria das variáveis que influencia a necessidade de N na adubação pode mudar no espaço e no tempo, como é o caso das características edafoclimáticas que interferem no potencial de suprimento do nutriente pelo solo. Assim, para se refinar o manejo da adubação nitrogenada, é preciso considerar a sua variabilidade espacial e...

Tipo: Documentos (INFOTECA-E)

Palavras-chave: Fertillidade do solo; Adubação nitrogenada; Precision farming; Maize; Zero tillage.; Agricultura de Precisão; Cerrado; Milho; Plantio Direto; Zea Mays.; Nitrogen fertilizers; Soil fertility..

Ano: 2008

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/556775

OLIVEIRA, C. M. de; VILELA, M. de F.; SHIRATSUCHI, L. S.; ABDALLA, R. P.; VIEIRA, A. L. N..

bitstream/CPAC-2009/26812/1/p2005_20.pdf

Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)

Palavras-chave: Pests of plants; Precision farming; Natural distribution.; Agricultura de Precisão; Glycine Max; Inseto; Praga de Planta; Soja.; Insecta; Soybeans..

Ano: 2006

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569439

Aplicação localizada de herbicidas.

SHIRATSUCHI, L. S.; CHRISTOFFOLETI, P. J.; FONTES, J. R. A..

ABSTRACT: Curent interest in site-specific weed control considering the weed spatial variability is increasing nowadays, when economical and environmental aspects are considered. This paper reviews the patch spraying methods for herbicides application systems regarding the economical and technical aspects. Using this new approach high herbicides savings are possible, maintaining the efficacy of chemical control using the site-specific herbicide applications, and consequently reducing the environmental impact of the broadcast application of herbicides.

Tipo: Documentos (INFOTECA-E)

Palavras-chave: Planta daninha; Precision farming; Agricultural chemicals.; Agricultura de Precisão; Defensivo; Controle Químico; Herbicida; Pulverização.; Chemical control; Herbicides; Spraying; Weeds..

Ano: 2003

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568141

Application of x-ray computed tomography in the evaluation of soil porosity in soil management systems

REA

Beraldo,José M. G.; Scannavino Junior,Francisco de A.; Cruvinel,Paulo E..

The study aimed to evaluate a methodology to quantify the porosity of the soil using computed tomography in areas under no-tillage, conventional tillage and native forest. Three soil management systems were selected for the study: forest, conventional tillage and no-tillage. In each soil management system, undisturbed soil samples were collected in the surface layer (0.0 to 0.10 m). The tomographic images were obtained using a X-ray microtomography. After obtaining the images, they were processed, and a methodology was evaluated for image conversion into numerical values. The statistical method which provided the greatest accuracy was the percentile method. The methodology used to analyze the tomographic image allowed quantifying the porosity of the soil...

Tipo: Info:eu-repo/semantics/other

Palavras-chave: Precision farming; Image processing; X-ray microtomography; Macroporosity.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000600012

Aprecíziós gazdálkodás beruházásainak megtérülése

Smuk, Norbert; Milics, Gabor; Salamon, Lajos; Nemenyi, Miklos.

A vizsgálatokból megállapítható, hogy a precíziós gazdálkodás bevezetésére irányuló beruházások megtérülése és az üzemi méretek között szoros az összefüggés. A feltételezett öt- és hatéves megtérülés mellett a hozam- vagy az elvárt kamatszint-változást a nagyobb területű üzemek képesek ellensúlyozni. --Return on investment in projects for implementing precision farming is closely related to farm size. In the event of the envisaged repayment over five or six years, farms with a larger area can balance changes in yield or interest rate.

Tipo: Journal Article

Palavras-chave: Precíziós gazdálkodás; Beruházás; Megtérülés; Üzemi méret; Precision farming; Investment; Return on investment; Farm size; Crop Production/Industries; Farm Management.

Ano: 2009

URL: http://purl.umn.edu/92483

ASSESSING SPATIAL BREAK-EVEN VARIABILITY IN FIELDS WITH TWO OR MORE MANAGEMENT ZONES

English, Burton C.; Mahajanashetti, S.B.; Roberts, Roland K..

Farmers are interested in knowing whether applying inputs at variable rates across a field is economically viable. The answer depends on the crop, the input, their prices, the cost of variable rate technology (VRT) versus uninform rate technology (URT), and the spatial and yield response variability within each field. Methods were investigated for determining the range of spatial variability over which the return to VRT covers its additional cost compared with URT in fields with multiple management zones. Models developed in this article, or variants thereof, could be used to help farmers make the VRT adoption decision.

Tipo: Journal Article

Palavras-chave: Management zones; Nitrogen; Precision farming; Site-specific management; Spatial break-even variability proportions; Spatial variability; Variable rate technology; Yield response variability; Farm Management.

Ano: 2001

URL: http://purl.umn.edu/15450

Biometric characteristics and canopy reflectance association for early-stage sugarcane biomass prediction

Scientia Agricola

Rocha,Murillo Grespan da; Barros,Flávio Margarito Martins de; Oliveira,Stanley Robson de Medeiros; Amaral,Lucas Rios do.

ABSTRACT: Knowing the spatial variability of sugarcane biomass in the early stages of development may help growers in their management decision-making. Proximal canopy sensing is a promising technology that can identify this variability but is limited to quantifying plant-specific parameters. In this study, we evaluated whether biometric variables integrated with canopy reflectance data can assist in the generation of models for early-stage sugarcane biomass prediction. To substantiate this assertion, four sugarcane-producing fields were measured with an active crop canopy sensor and 30 sampling plots were selected for manually quantifying chlorophyll content, plant height, stalk number and aboveground biomass. We determined that Random Forest and Multiple...

Classificação não-supervisionada no delineamento de zonas de manejo.

Palavras-chave: Random forest; Canopy sensor; Vegetation indices; Precision farming; Data mining.

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400274

SHIRATSUCHI, L. S.; QUEIROS, L. R.; FACCIONI, G. C..

RESUMO: O objetivo deste trabalho foi utilizar o método de classificação não-supervisionada (fuzzy K-means) em dados de produtividade para delineamento de zonas de manejo. O estudo foi conduzido a partir de dados georregerenciados de produtividade de grãos coletados por sensores e DGPS. Foram mapeadas três safras (milho-soja-arroz) em área de plantio direto irrigada por pivô central. Os dados de produtividade foram interpolados pelo inverso da distância resultando em um mapa de resolução espacial de 5 x 5 m. Os valores relativizados em relação à média de produtividade foram comparados ao longo do tempo nos mesmos locais. Como referência, foram escolhidas três classes de produtividade para delinear as zonas de manejo segundo os seguintes critérios:...

Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)

Palavras-chave: Fuzzy kmeans; Precision farming; Productivity.; Agricultura de Precisão; Mapa; Produtividade.; Cartography; Yield mapping..

Ano: 2005

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570016

Comparação de modelos receptores GPS para utilização na agricultura de precisão.

SHIRATSUCHI, L. S.; ZIVIANI, A. C.; MARTINS, F. da S..

ABSTRACT: After the liberation of Selective Availability (S/A) several GPS receivers started to have enough accuracy or precision for work with grid sampling in Precision Agriculture. There are few articles describing the accuracy and precision of these receivers. The objective of this work was compared and calculated the accuracy of two models very used for grid sampling in Brazil. The study was done in a flat surface, common in the Cerrados region. The geographical reference was determined by DGPS collecting data for 10 hous. The tested models (Garmin GPSIII Plus and Garmin etrex Vista) were evaluated for 5 days in the period of 7 a.m. to 17 p.m. The concept of Circular Error Probability (CEP) was uded for the accuracy and precision calculation. The...

Tipo: Comunicado Técnico (INFOTECA-E)

Palavras-chave: GPS; Precision farming; Circular error probality.; Agricultura de Precisão..

Ano: 2004

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569252

Conceitos e considerações práticas do sistema de geração de mapas de produtividade na cultura de grãos.

Conceitualização de um sistema de suporte à decisão para o dimensionamento e manejo de pivô central em condições de irrigação de precisão.

SHIRATSUCHI, L. S..

ABSTRACT: Precison Agriculture adoption is increasing on savannas region in the central plain areas in Brazil, principally because fertilizers and others pesticides were saved reducing the cost of grain production in the agricultural areas. But environmental pollution with these products area also become a problem. It was estimated that the are with variable rate tax of fertilizers in brazilian agricultural areas is about on million hectare, this is quarter of no till system broadcast area in the Savannas Region. But Precision Agriculture tools are unknown by a lot of farmers and technicians and one of these tools that make possible Precision Agriculture adoption is the yield map generation with monitors. This guideline aims farmers and agricultural...

Tipo: Documentos (INFOTECA-E)

Palavras-chave: Mapeamento; Precision farming; Harvest monitor.; Agricultura de Precisão; Colheita; Rendimento.; Cartography; Harvesting; Yield monitoring; Yields..

Ano: 2004

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569192

Correlação da distribuição espacial do banco de sementes de plantas daninhas com a fertilidade dos solos.

RODRIGUES, L. N.; PRUSKI, F. F.; AZEVEDO, J. A. de; SILVA, E. M. da.

RESUMO: Embora a água seja um dos principais componentes de produção a afetar a produtividade das culturas, sua variabilidade dentro da área irrigada é frequentemente ignorada. Acredita-se que isto seja devido à falta de instrumentos confiáveis para sua medição em tempo real como, por exemplo, aqueles existentes para medição de nitrogênio. Nota-se que há, nesta área do conhecimento, uma grande oportunidade para utilização de modelos computacionais, os quais são usualmente utilizados no dimensionamento e manejo de sistemas de irrigação e que, agora, poderão ser utilizados na geração de mapas de umidade do solo, os quais poderão auxiliar o projetista no momento de interpretar os mapas de rendimento. O objetivo do presente trabalho foi apresentar a...

Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)

Palavras-chave: Escoamento superficial; Irrigation equipment; Precision farming; Infiltration water.; Agricultura de Precisão; Água; Evapotranspiração; Infiltração; Irrigação; Pivô Central; Solo.; Evapotranspiration; Soil.; Runoff.

Ano: 2005

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/571365

SHIRATSUCHI, L. S.; FONTES, J. R. A.; RESENDE, A. V..

bitstream/CPAC-2009/25291/1/p2004_18.pdf

Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)

Palavras-chave: Planta daninha; Mapeamento; Distribuição espacial; Mapping; Precision farming; Natural distribuition.; Agricultura de Precisão; Fertilidade do Solo; Erva Daninha; Semente.; Soil fertility; Seeds; Weeds..

Ano: 2005

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568290

Correlação entre índice de cone e produtividade de milho utilizando ferramentas da agricultura de precisão.

Design and evaluation of a yield monitoring system for combinable crops

MACHADO, T. M.; SHIRATSUCHI, L. S.; SÁ, M. A. C. de; CORAZZA, E. J..

bitstream/CPAC-2009/26821/1/p2005_27.pdf

Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)

Palavras-chave: Mapeamento; Maize; Productivity; Precision farming; Soil compactation.; Agricultura de Precisão; Compactação do Solo; Milho; Produtividade; Zea Mays.; Cartography..

Ano: 2006

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569260

CIGR Journal

Kargarpour, Hoda; Razavi, Jalil; Hemmat, Abbas; Salar, Mahmood Reza.

The existence of spatial variability within fields can be beneficial if inputs for arable crop are given to the field according to locally determined requirements. While yield mapping has become an important part of precision farming strategies, the goal of this paper is to plot a yield map by the application of yield monitoring components. A yield monitoring system capable of providing sufficient reliable data to plot a yield map for small grain fields in central regions of Iran was developed. The system consisted of an impact flow sensor determining the mass flow of grain, the GPS receiver determining geographical position of the machine, two shaft encoders measuring the speed of the combine, an ultrasonic sensor measuring the actual cutting width, and a...

Determination of nitrogen and chlorophyll levels in bean-plant leaves by using spectral vegetation bands and indices

Palavras-chave: Wheat; Spatial variability; Yield map; Mass flow sensor; Precision farming.

Ano: 2016

URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3608

Rev. Ciênc. Agron.

Abrahão,Selma Alves; Pinto,Francisco de Assis de Carvalho; Queiroz,Daniel Marçal de; Santos,Nerilson Terra; Carneiro,José Eustáquio de Souza.

This study aimed to develop classifiers based on different combinations of spectral bands and vegetation indices from original, segmented and reflectance images in order to determine the levels of leaf nitrogen and chlorophyll in the bean, and to define the best time and best variables. A remote-sensing system was used, consisting of a helium balloon and two small-format digital cameras. Besides the individual spectral bands, four vegetation indices were tested: simple ratio, normalized difference, normalized difference in the green band, and modified-chlorophyll absorption. The classifiers proved to be efficient in determining levels of leaf nitrogen and chlorophyll. The best time for determining leaf N content was at 13 DAE (stage V4). The best...

Development of a smart machine-vision-based system to detect water stress in greenhouse tomato plants

Palavras-chave: Precision farming; Remote sensing; Nitrogen dosage.

Ano: 2013

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000300007

CIGR Journal

LAK, MohammadBagher.

Timely detection of water stress in agricultural crops is important. In this paper, a smart classification algorithm was developed to detect water stress in tomato plants that were grown in the greenhouse. During the growth period, thermal and visible light images were acquired from the canopy tops in two states: (1) plants in normal conditions; and (2) plants under water stress. Images were obtained using a camera that recorded simultaneous frames of thermal and visible (red, green, and blue (RGB)) features. Based on these features, 22 parameters were defined and applied to classify the image frames. In order to develop an efficient algorithm, principal component analysis (PCA) was applied to optimize the classifying of parameters. For normalizing the...