scholarly journals DESIGN AND EVALUATION OF A CONTROLLER TO ACHIEVE OPTIMUM SEEDING RATE WITH SPECIFIC SPATIAL MANAGEMENT IN AGRICULTURAL MACHINERY

2019 ◽  
Vol XLII-4/W18 ◽  
pp. 917-921
Author(s):  
A. Saberi ◽  
E. Khesali ◽  
M. Fakhri ◽  
H. Enayati ◽  
M. Koushapoor
Keyword(s):  
Control System ◽  
Precision Agriculture ◽  
Rotational Speed ◽  
Gear Ratio ◽  
Modern Technology ◽  
Variable Rate ◽  
Seeding Rate ◽  
Fixed Rate ◽  
Positioning Systems ◽  
Spatial Management

Abstract. Achieving optimal seeding rates in different areas of the field is very important for maximizing crop yield. Nowadays, spatial management of croplands as a modern technology has been recommended in precision agriculture systems. Agricultural inputs such as seed, fertilizers, herbicides, etc., should be optimized with field conditions in different areas. For example, fertilizing and moisture should being compatible. Due to changes in these two factors, optimum seeding rates might being different in a field; areas with higher fertility or higher soil moisture have the higher seed rates. An applicable method to reach the ability of variable seeding rates in agricultural machines is to add controllers to the conventional fixed seeding rate seed drills. In the spatial management technology for seeding in a variable rate, first, the map of required seed for seeding practice is prepared for each particle of the field and then loaded in the machine at GIS format. The controller controls the seed rate continuously using the GIS map and the spatial position of the machine at field is provided by positioning systems. The aim of this study was to select the best closed-loop variable rate control system for Hassia seed drill shifting from a fixed rate to variable rate. To this end, Assessment of the performance of a control system that mounted on the seed dill and vary the rotational speed of the seed metering drive shaft performed. The control system was included a 250-watt DC engine, gearbox with constant gear ratio, two encoders (first for sensing the seed drill speed and second for sensing the rotational speed of the engine), position receiver and navigation, DC engine controller, and a portable computer for collecting data. The response time for transmitting seeding rate by the controller was determined from low to high 4/7 seconds and from high to low 2/5 seconds.

scholarly journals Reducing Topdressing N Fertilization with Variable Rates Does Not Reduce Maize Yield

2021 ◽  
Vol 13 (14) ◽  
pp. 8059
Author(s):  
Calogero Schillaci ◽  
Tommaso Tadiello ◽  
Marco Acutis ◽  
Alessia Perego
Keyword(s):  
Precision Agriculture ◽  
Stem Elongation ◽  
Maize Yield ◽  
Application Rate ◽  
N Fertilization ◽  
Economic Benefits ◽  
Growth Monitoring ◽  
Fixed Rate ◽  
Positioning Systems ◽  
Significant Difference

Proximal sensing represents a growing avenue for precision fertilization and crop growth monitoring. In the last decade, precision agriculture technology has become affordable in many countries; Global Positioning Systems for automatic guidance instruments and proximal sensors can be used to guide the distribution of nutrients such as nitrogen (N) fertilization using real-time applications. A two-year field experiment (2017–2018) was carried out to quantify maize yield in response to variable rate (VR) N distribution, which was determined with a proximal vigour sensor, as an alternative to a fixed rate (FR) in a cereal-livestock farm located in the Po valley (northern Italy). The amount of N distributed for the FR (140 kg N ha−1) was calculated according to the crop requirement and the regional regulation: ±30% of the FR rate was applied in the VR treatment according to the Vigour S-index calculated on-the-go from the CropSpec sensor. The two treatments of N fertilization did not result in a significant difference in yield in both years. The findings suggest that the application of VR is more economically profitable than the FR application rate, especially under the hypothesis of VR application at a farm scale. The outcome of the experiment suggests that VR is a viable and profitable technique that can be easily applied at the farm level by adopting proximal sensors to detect the actual crop N requirement prior to stem elongation. Besides the economic benefits, the VR approach can be regarded as a sustainable practice that meets the current European Common Agricultural Policy.

Role of Telecommunications in Precision Agriculture

2011 ◽  
pp. 252-266
Author(s):  
James M. McKinion
Keyword(s):  
Precision Agriculture ◽  
Low Cost ◽  
New Technology ◽  
Local Area ◽  
Variable Rate ◽  
Positioning Systems ◽  
Storage And Retrieval ◽  
Data Files ◽  
Commercial Sources

Precision agriculture has been made possible by the confluence of several technologies: geographic positioning systems, geographic information systems, image analysis software, low-cost microcomputerbased variable rate controller/recorders, and precision tractor guidance systems. While these technologies have made precision agriculture possible, there are still major obstacles which must be overcome to make this new technology accepted and usable. Most growers will not do image processing and development of prescription maps themselves but will rely upon commercial sources. There still remains the challenge of storage and retrieval of multi-megabytes of data files for each field, and this problem will only continue to grow year by year. This chapter will discuss the various wireless technologies which are currently being used on three proof-of-concept farms or areas in Mississippi, the various data/ information intensive precision agriculture applications which use wireless local area networking and Internet access, and the next generation technologies which can immensely propel precision agriculture to widespread use in all of agriculture.

Role of Telecommunications in Precision Agriculture

2010 ◽  
pp. 836-850
Author(s):  
James M. McKinion
Keyword(s):  
Precision Agriculture ◽  
Low Cost ◽  
New Technology ◽  
Local Area ◽  
Variable Rate ◽  
Positioning Systems ◽  
Storage And Retrieval ◽  
Data Files ◽  
Commercial Sources

Precision agriculture has been made possible by the confluence of several technologies: geographic positioning systems, geographic information systems, image analysis software, low-cost microcomputer- based variable rate controller/recorders, and precision tractor guidance systems. While these technologies have made precision agriculture possible, there are still major obstacles which must be overcome to make this new technology accepted and usable. Most growers will not do image processing and development of prescription maps themselves but will rely upon commercial sources. There still remains the challenge of storage and retrieval of multi-megabytes of data files for each field, and this problem will only continue to grow year by year. This chapter will discuss the various wireless technologies which are currently being used on three proof-of-concept farms or areas in Mississippi, the various data/information intensive precision agriculture applications which use wireless local area networking and Internet access, and the next generation technologies which can immensely propel precision agriculture to widespread use in all of agriculture.

Research on Variable Rate Fertilization Control System Based on Fuzzy PID

2014 ◽  
Vol 614 ◽  
pp. 207-210
Author(s):  
Jin Xia Huang ◽  
Hai Bo Zhou ◽  
Jun Fa Wang ◽  
Yan Hou
Keyword(s):  
Control System ◽  
Pid Control ◽  
Precision Agriculture ◽  
Hydraulic System ◽  
Pid Controller ◽  
Variable Rate ◽  
Self Tuning ◽  
High Control ◽  
Fertilization System ◽  
Control Accuracy

According to the operator experiences, the variable rate fertilization system based on the fuzzy self-tuning PID controller is researched in this paper, which is driven by electrically and hydraulic system. This system solves the problem that the parameters adjustment of the traditional PID is difficult. The system model is presented and is simulated by using MATLAB/ SIMULINK toolbox. The simulation results shows that the fuzzy self-tuning PID control could obtain better dynamic response and achieve the expected control effects. In order to verify this control system performance, many experiments are carried on in the lab. The experiments results show that the variable rate fertilization system based on fuzzy self-tuning PID control has high control accuracy and could meet the control requirements of the variable rate fertilization in precision agriculture.

Role of Telecommunications in Precision Agriculture

2010 ◽  
pp. 834-848
Author(s):  
James M. McKinion
Keyword(s):  
Precision Agriculture ◽  
Low Cost ◽  
New Technology ◽  
Local Area ◽  
Variable Rate ◽  
Positioning Systems ◽  
Storage And Retrieval ◽  
Data Files ◽  
Commercial Sources

Precision agriculture has been made possible by the confluence of several technologies: geographic positioning systems, geographic information systems, image analysis software, low-cost microcomputer- based variable rate controller/recorders, and precision tractor guidance systems. While these technologies have made precision agriculture possible, there are still major obstacles which must be overcome to make this new technology accepted and usable. Most growers will not do image processing and development of prescription maps themselves but will rely upon commercial sources. There still remains the challenge of storage and retrieval of multi-megabytes of data files for each field, and this problem will only continue to grow year by year. This chapter will discuss the various wireless technologies which are currently being used on three proof-of-concept farms or areas in Mississippi, the various data/information intensive precision agriculture applications which use wireless local area networking and Internet access, and the next generation technologies which can immensely propel precision agriculture to widespread use in all of agriculture.

scholarly journals Adoption of precision agriculture technologies in Ontario crop production

2018 ◽  
Vol 98 (6) ◽  
pp. 1384-1388 ◽  
Author(s):  
Sean Mitchell ◽  
Alfons Weersink ◽  
Bruce Erickson
Keyword(s):  
Precision Agriculture ◽  
Crop Production ◽  
Service Providers ◽  
Variable Rate ◽  
Global Positioning Systems ◽  
Agricultural Technologies ◽  
Positioning Systems ◽  
Vast Amount ◽  
Global Positioning

Ontario agricultural service providers were surveyed on their use of precision agricultural technologies. Global positioning systems are the most commonly adopted, while adoption rates for variable rate systems are significantly less. Enhancing adoption requires turning the vast amount of data collected on crop production into valuable decisions for the farmer.

scholarly journals A Path Model of the Intention to Adopt Variable Rate Irrigation in Northeast Italy

2021 ◽  
Vol 13 (4) ◽  
pp. 1879
Author(s):  
Maurizio Canavari ◽  
Marco Medici ◽  
Rungsaran Wongprawmas ◽  
Vilma Xhakollari ◽  
Silvia Russo
Keyword(s):  
Technology Acceptance ◽  
Precision Agriculture ◽  
Ease Of Use ◽  
Perceived Usefulness ◽  
Path Model ◽  
Irrigated Agriculture ◽  
Variable Rate ◽  
Intention To Adopt ◽  
Factors Influencing ◽  
Variable Rate Irrigation

Irrigated agriculture determines large blue water withdrawals, and it is considered a key intervention area to reach sustainable development objectives. Precision agriculture technologies have the potential to mitigate water resource depletion that often characterises conventional agricultural approaches. This study investigates the factors influencing farmers’ intentions to adopt variable rate irrigation (VRI) technology. The Technology Acceptance Model 3 (TAM-3) was employed as a theoretical framework to design a survey to identify the factors influencing farmers’ decision-making process when adopting VRI. Data were gathered through quantitative face-to-face interviews with a sample of 138 fruit and grapevine producers from the Northeast of Italy (Veneto, Emilia-Romagna, Trentino-Alto Adige, Friuli-Venezia Giulia). Data were analysed using partial least squares path modelling (PLS-PM). The results highlight that personal attitudes, such as perceived usefulness and subjective norm, positively influence the intention to adopt VRI. Additionally, the perceived ease of use positively affects intention, but it is moderated by subject experience.

Control System for the Mountainous Orchard Electric-Drive Monorail Transporter

2015 ◽  
Vol 738-739 ◽  
pp. 935-940 ◽  
Author(s):  
Zhen Li ◽  
Pei Xu ◽  
Yu Ping Ouyang ◽  
Shi Lei Lv ◽  
Qiu Fang Dai
Keyword(s):  
Control System ◽  
Electric Drive ◽  
Gear Ratio ◽  
System A ◽  
Speed Measurement ◽  
Driving Speed ◽  
Current Consumption ◽  
Operation Risk ◽  
Load Weight ◽  
Steep Hill

In order to reduce operation risk and working intensity in mountainous orchard transportation and to realize optimized control for the mountainous orchard electric-drive monorail transportation system, a mountainous orchard electric-drive monorail transporter control system was designed and developed in this study. The system mainly consists of modules as: manual and remote control, positioning, obstacle avoidance, speed measurement, motor control, electric-magnetic break, and the position limit. The driving speed, current consumption, break control, and battery pack running ability experiments were conducted to test the control system. Results indicated that, the transporter’s driving speed is 0.60~0.58 m/s when it is running on the ground with the load weight from 0 to 100kg. This speed is little affected by the load weight. The transporter’s driving speed is 0.45~0.28 m/s when it is climbing a steep hill with an angle of 39°. That speed is critically affected by the load weight. In further improvements, a shift mechanism will be introduced so that adjustable gear ratio could be achieved thus solve the current overload problem in a full load situation.

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