A System for the Real-Time Geo-Referenced Measurement of Soil Parameters

The aim of this research is to develop a system for accurately measuring in real-time, collecting and processing a high amount of geo-referenced data of soil physical-mechanical parameters, e.g. cone penetrometer resistance, index of soil compaction, and draft force. The system for measuring the soil cone penetrometer resistance is comprised of a load cell, connected to a rod, ending with a cone, and is mounted on a frame, fixed to the front part of a tractor. The system for measuring the draft force required to till the soil is comprised of a load cell, mounted on the hitch hook of a tool carrier, towed by the tractor. Moreover, in order to test the usefulness of the system with different types of linkage tractor-implement, two other load cells were mounted, respectively, on the top link and the right point of the three-point hitch of the tool carrier. The signals of the load cells and of a DGPS mobile receiver are acquired by a portable computer, by means of a Virtual Instrument developed in LabVIEW environment. The results of the first tests, carried out in a field in inland Sicily, showed that: the system is able to log data with a sampling frequency adjustable from 1 to 10 Hz; it is able to accurately measure and collect in real-time a large amount of data, which can be easily processed by means of a data sheet, a GIS or another software usable for measuring the within-field spatial variability of soil physical-mechanical parameters; the absolute value of the force measured on the hitch hook of the tool carrier is proportionally correlated to that measured on any point of the three-point hitch of the same one

Italian Potential Biogas and Biomethane Production from OFMSW

This work is aimed at predicting the potential biogas and biomethane production, using the Organic Fraction of Municipal Solid Waste (OFMSW), in Italy, where 1388 Anaerobic Digestion (AD) plants (power of 7.4 TWh, equal to 640.4 ktep) are nowadays available. In order to compute the potential biogas and biomethane production in the 20 Italian regions, the data about OFMSW production in 2010-2013 period have been evaluated. The Italian production of OFMSW, that was 5.2 million tons in 2013 (18% of MSW), could be used inside bioreactors for producing biogas and digestate, that must be aerobically composted into a biofertiliser. In 2013, the Italian potential biogas production from OFMSW was 739 million m3, that is equal to 444 million m3 of biomethane. The highest biogas production from OFMSW was in Lombardy region (143 million m3), having a potential biomethane production of 86 million m3. The highest OFMSW production per inhabitant was in Emilia-Romagna region (142 kg). Yet, if OFMSW was 37% of MSW, the potential biogas and biomethane production should be increased: the biomethane production increase would be 486 million m3, of which the maximum would be in Sicily region. The biogas produced can be used for generating heat and electricity or upgraded into biomethane, distributed at dedicated stations and useful as biofuel for powering means of transport. This biofuel would replace natural gas, and, therefore, allow a reduction of GreenHouse Gas emissions of 200 g of CO2 kWh-1 (5.5 times lower) and the import of fossil fuels from abroad

A System to Simplify the Use of Mounted Shakers for Harvesting Olives and Dry Fruits

The shakers for harvesting olives and dry fruits have reached a high standard and their use is increasing rapidly. In order to satisfy the different demand, manufacturers offer a wide range of shakers, from the more expensive self-propelled ones to those to be mounted on the tractor’s power lift, with shaking headers of different mass and size, suitable for the different orchard characteristics. Self-propelled shakers have high steering capacity and optimum visual field for the operator, so their working capacity is very high with respect to that of mounted shakers, which are less expensive but have lower steering capacity and a limited view on the header. Therefore the approaching of mounted shakers to the plant and the fastening of the header to the trunk or branch of the tree is more difficult, and a second operator to pilot the tractor driver is needed, in order to increase the machine working capacity and to avoid plant and/or shaker damages. This paper proposes to use a system composed of a CCD video camera, installed on the frame of a mounted shaker and connected to a TFT monitor, fitted in the tractor cab. Comparative tests with and without the above system were carried out. The video camera was mounted on the shaker frame. The system is relatively cheap, user-friendly and can be mounted on any shaker. It provides the driver with an easy view of the lower dead angle and increases the working capacity and productivity of the machine

A system for spatially variable rate fertiliser application

The crop yield can be spatially variable within the same field, because of spatially variable soil characteristics (slope, texture, pH, etc.), influencing the soil nutrient content (of nitrogen, phosphorus, potassium, etc.). Because of this within-field spatial variability, in the precision agriculture cycle, the targeted fertiliser spreading can be highly profitable for both environment protection and cost saving. For this aim the yield and, then, the soil nutrient content must be measured on a localised basis and, therefore, mapped. Relying on the yield map and on the map of each nutrient available in the field it is possible to produce the fertiliser application map, which must be stored on a portable computer, in order to perform the spatially variable rate fertiliser spreading. For this aim an electronic system able to apply fertiliser rates proportionally related to the machine forward speed is also needed; this system can be mounted not only on any pneumatic spreader but also on any centrifugal spreader with setting up system working by gravity. Yet, the fertiliser spreaders produced by different manufacturers, which are equipped with systems able to apply not only rates proportionally related to machine forward speed but also spatially variable rates, are very expensive. Therefore, the I.T.A.F. Department designed, developed and set up a system for spatially variable rate fertiliser application, compatible with most DGPS and spreaders able to apply rates proportionally related to the machine forward speed. The system is constituted by a data sensing system (DGPS and Doppler radar), a data processing system (portable computer, with a specifically developed software called Precision Agriculture Controller) and an active and control system (Land Manager of DICKEY-john with built-in display and keyboard), able to apply rates proportionally related to machine forward speed, by varying the size of the two hopper openings. The software is able to: receive and interpret DGPS position data and compare them with the fertiliser application map, in order to identify the rate related to the actual machine position; transmit commands to Land Manager; log the machine track and the applied rates

Multivariate geostatistics for assessing and predicting soil compaction

The aim of this research is to investigate the potential of geostatistical techniques for understanding and evaluating the spatial variability of soil compaction, caused by the traffic of agricultural machines and/or the action of tillage implements. Soil cone penetrometer resistance was measured in a field of inland Sicily, along a transect of 3 m length, from the soil surface until 70 cm depth. The 3D mean maps showed a random variation on the surface and a high spatial correlation among penetrometer resistance data measured at different depths. The map corresponding to five tractor passes showed the largest extension of the areas characterised by the highest values of penetrometer resistance. The probability maps showed that at least 20% of the monitored soil volume can exceed the critical penetrometer resistance for root growth

Mapping of penetrometer resistance in relation to tractor traffic using multivariate geostatistics

The traffic of agricultural machines can cause soil compaction and high variability of soil structure, both along normal lines and along those parallel to the field plane. The aim of this research is to investigate the potential of geostatistical techniques for understanding and evaluating the within-field spatial variability of soil compaction, caused by the traffic of agricultural machines and/or the action of tillage implements. In July 2003 soil cone penetrometer resistance was measured in a sandy-silt Cambisol of inland Sicily, where a three-year rotation wheat (Triticum durum Desf.) - wheat - tomato (Solanum lycopersicum L.) was adopted, along three parallel 3-m long transects, from the soil surface to a depth of 0.70 m. A multivariate geostatistical approach, including exploratory analysis, variography, stochastic simulation and post-processing of simulations was applied to produce thematic maps of penetrometer resistance and probability maps exceeding a critical value, corresponding to different examples of tractor movement. Penetrometer resistance variation was erratic at the surface but showed high spatial correlation between data measured at different depths. The maps of probabilistic compaction risk showed that the soil volume, exceeding the penetrometer resistance of 2.5 MPa, critical for root growth, increased from 20% to 40% after the tractor had passed through five times

Design and implementation of a smart system to control aromatic herb dehydration process

Drying is a process aimed at reducing the water content in plant materials below a limit where the activity of microbes and decomposing enzymes deteriorate the quality of medicinal and aromatic plants. Today, the interest of consumers towards medicinal and aromatic herbs has registered a growing trend. This study aims at designing a low-cost real-time monitoring and control system for the drying process of aromatic herbs and evaluating drying ecacy on the microbial community associated with the studied herbs. Hot-air drying tests of sage and laurel leaves were carried out in a dryer desiccator cabinet at 40 C and 25% relative humidity using three biomass densities (3, 4 and 5 kg/m 2 ). The prototype of the smart system is based on an Arduino Mega 2560 board, to which nine Siemens 7MH5102-1PD00 load cells and a DHT22 temperature and humidity sensor were added. The data acquired by the sensors were transmitted through Wi-Fi to a ThingSpeak account in order to monitor the drying process in real time. The variation in the moisture content of the product and the drying rate were obtained. The system provided a valid support decision during the drying process, allowing for the precise monitoring of the evolution of the biomass moisture loss and drying rate for laurel and sage. The three dierent biomass densities employed did not provide significant dierences in the drying process for sage. Statistically significant dierences among the three tests were found for laurel in the final part of the process. The microbial loads of the aromatic herbs after drying were influenced by the dierent leaf structures of the species; in particular, with laurel leaves, microbial survival increased with increasing biomass density. Finally, with the drying method adopted, the two species under consideration showed a dierent microbial stability and, consequently, had a dierent shelf life, longer for sage than laurel, as also confirmed by water activity (aw) values

Tools for quality assurance and assessment of Agricultural Engineering programmes, TUNING subject-area lines and disappearing/rare knowledge in Italy

The quality assurance process applied by Italian State University institutions, in order to achieve some level of internal quality control or assessment for the offered study programmes, is established in the funding criteria of the Ordinary Financing Fund (FFO), decided by the National Committee for the Evaluation of the University System (CNVSU). In most Italian Universities the quality assurance and assessment procedure of the study programmes starts with a report, written by a specific committee, that carries out an internal assessment, by which the strong and weak points of the study programme and the related causes are focused. The quality assurance and assessment procedure appoints three autonomous and independent assessors, who have the task of carrying out an external assessment of the degree study programmes and publishing an evaluation report. In Italian Universities the Faculty Assembly holds the tasks of: setting the education and research objectives and evaluating the success in satisfying them; providing, monitoring and enhancing the intellectual and material resources; demonstrating high standards to external assessors and taking into account their reports; co-operating with representatives of professional bodies for carrying out the examination for accessing the professional activity; planning new programme specifications; monitoring student career progression. The Degree Study Programme Assembly holds the task of approving the study programmes of individual students. Moreover, in Italy the Ministry of Education, University and Research, the region administration and the University academic bodies hold the responsibility of: overseeing academic quality and standards; managing the University education and research strategy; overseeing the development and management of quality assurance procedures; approving Faculty recommendations related to the proposal of new study programmes and/or the discontinuation of existing ones. In Italy the Standard Assessment procedure for students is based on the following principles: students can take an examination for a specific course as many times as they wish; examiners and assessors are appointed by the Faculty Dean, while a specific committee is responsible for University examinations; students are finally examined for their thesis by a Faculty committee. Italian Universities offer a Code of Practice for education and research, which is included in several laws and decrees, that set out the guidelines which must be followed in managing a study programme and designing the related courses. In Italy the typical degree profiles in Agricultural/Biosystems Engineering, for the three study levels, are offered by five University Faculties of Agriculture. As regards the status of rare/disappearing knowledge in Agricultural/Biosystems Engineering studies in Italy, it is needed to focus especially on the following subjects: historical farm buildings and new purposes; agritourism; agricultural museums. In Italy several actions try to protect and revitalise the historical farm buildings and, therefore, create jobs and profit for the local community. The destiny of Italian old buildings mainly depends on the implementation of integrated rural development plans, taking into account the landscaping and environmental functions of farms. Converting historical farm buildings or houses into B&B lodges, farm hotels and restaurants generates a new farm activity called agritourism. In Italy, where more than 1600 farm resorts are available, incentives provided for agritourism have been successful in preventing the depopulation of the countryside. A historical farm building can be converted into an agricultural museum. More than 500 agricultural museums are available throughout Italy