in iran, onion plants are currently broadcast over the majority of onion fields and weeding and harvesting are done manually by seasonal workers. at harvest time, 40 worker-days are required to onion dig just one hectare. this cost could be saved if the operation could be carried out by machine. rear-mounted diggers can only be implemented if 40 cm spacing between rows is allowed for each tract...

The influence of soil parameters and weeder design on implement performance is discussed. Soil parameters that are important in this context are cohesion, adhesion and internal friction. Important weeder design parameters are blade angles of attack and approach, blade overlap and blade support configuration. An example of an animal-drawn weeder developed in Mexico is analysed. An evaluation of ...

Motif searching, i.e., identifying meaningful patterns from biological data, has been studied extensively due to its importance in the biomedical sciences. In this work, we seek to improve the performance of Weeder, a widely-used tool for automatic de novo motif searching. Weeder consists of several functions, among which we find that the function namely oligo_scan, which handles the pattern ma...

Camera-guided narrow (15 cm)-row, inter-row cultivation, with or without the Einböck rotary weeder, reduced weed growth but had lower yield than herbicide-treated dry beans. In wide rows (60 cm), camera guidance improved finger weeder performance and mechanically weeded bean yields were similar to herbicide treatment.

Unconventional ways of growing plants, when we return to non-chemical methods of controlling weeds, require new weed control methods. One of the few physical methods, which found wider application in practice, is a flame weeder with heat burners based on the use of gas (LPG). However, the process of practical use of this flame weeder has a number of factors that positively or negatively affect ...

This paper presents a mechanical control method for precise weeding based on deep learning. Deep convolutional neural network was used to identify and locate weeds. A special modular weeder designed, which can be installed the rear of mobile platform. An inverted pyramid-shaped tool equipped in shovel out weeds without being contaminated by soil. The weed detection implemented an embedded syste...