Researchers around the world have focused on autonomous agriculture with systems encompassing greenhouse, orchard, field, and other applications. Research has shown the potential and ability of the technology to allow a vehicle or selection of vehicles to follow a specified task. In this study, one aspect of the problem, that of operating a tractor−cart combination in conjunction with a small−g...

Agricultural vehicle navigation includes both on-road and on-field operations. The objective for on-road navigation is to guide the vehicle traveling on paved or prepared road according to a scheduled path plan, and for on-field guidance is to guide the vehicle following crop rows without overrun on crops. In this paper, the authors have presented an on-field navigation system with redundant se...

Abstract. Researchers around the world have focused on autonomous agriculture, with systems encompassing greenhouse, orchard, field and other applications. Research has shown the potential and ability of the technology to allow a vehicle or selection of vehicles to follow a specified task. In this study, one aspect of the problem, that of operating a tractor-cart combination in conjunction with...

The blurred images will make image processing difficult and be hard to get high image solution for recognition, which will lower the precision of a variable rate spray system in pesticide application. In this paper, Radon transform in frequency domain is used in this work to test the blur angle and blur length in different tractors speeds and camera heights. Four image restoration methods in te...

The J1939-based ISO standard 11783 describes CAN-based communication in open networks for use in mobile machines in the agricultural industry. ISO 11783 is a multi-master network based on CAN, whose protocol is harmonized with J1939. The ISOBUS concept describes a minimum degree of functionality for software and hardware that ECUs or networks must provide. The ISOBUS protocol ensures that a sui...

Statistical techniques play a major role in contemporary methods for analyzing magnetic resonance imaging (MRI) data. In addition to the central role that classical statistical methods play in research using MRI, statistical modeling and machine learning techniques are key to many modern data analysis pipelines. Applications for these techniques cover a broad spectrum of research, including man...

Subcategorization frames are useful for many applications. Due to many ambiguities, to extract them is not straightforward. In this paper, a probabilistic chunker is used to determine the plausible phrase boundaries and a finite state mechanism, SUBCAT-TRACTOR, is proposed to extract 23 subcategorization frames. In order to get rid of the problems introduced by compound nouns, a noun-phrase ext...

A new method is described that can be used to decompose human controlled agricultural operations into robotic behaviours embedded in an autonomous tractor. Four main levels have been identified: Operation, Task, Optimisation/Behaviour and Primitive actions where each level is subsumed by the level above. Tasks were further classified into two distinctive types, deterministic tasks that can be p...

Through the use of a virtual tractor-trailer link model, vehicle following capabilities have been implemented without the need of communications links between the two vehicles or the installation of special road infrastructure. The principle is based on the modeling of an off-hooked trailer system as a software link between the lead and led vehicles. The leader vehicle is modeled as the tractor...

The experiment was planned to investigate the tractor mounted N-sensor (Make Yara International) to predict nitrogen (N) for wheat crop under different nitrogen levels. It was observed that, for tractor mounted N-sensor, spectrometers can scan about 32% of total area of crop under consideration. An algorithm was developed using a linear relationship between sensor sufficiency index (SIsensor) a...