Introduction The nature of the processes reported here should not be regarded as occurring independently of other' reactions for the soil has a universe of its own in which a great number of different reactions are occurring simultaneously with one another. The type of investigations conducted below are thus only a part of a great number which can and do occur, and have 'been investigated in th...

In contrast to typical planning problems, automated earthmoving operations such as digging a trench or leveling a mound of soil pose some additional challenges. First, soil is diffuse and therefore a unique description of the world requires a very large number of variables. Second, the interaction between the robot and the world is very complex to the point that it is not possible to accurately...

Dow AgroSciences Australia Ltd has developed a genetically modified (GM) soybean line known as DAS-68416-4 that is tolerant to two herbicides, glufosinate ammonium and 2,4-dichlorophenoxyacetic acid (2,4-D). Tolerance to glufosinate ammonium is achieved through expression of the enzyme phosphinothricin acetyl transferase (PAT) encoded by the pat gene derived from the soil bacterium Streptomyces...

Some of the design requirements for power transmission line grounding in highly resistive soil to reduce lightning flashback rate are often contradictory, such as: low values of both low-frequency ground resistance and high-frequency (HF) ground impedance. Former requires larger dimensions of the grounding electrodes that lead to higher values of their HF impedance due to inductive effects. Pap...

An efficient and modular numerical prediction model is presented to predict vibrations and re-radiated noise in buildings due to metro trains. The approach comprises of three weakly coupled problems: the dynamic vehicle-track-tunnel-soil interaction problem, the dynamic soil-structure interaction problem and the calculation of the acoustic response inside the rooms. The three-dimensional dynami...

1 CHILEAN JOURNAL OF AGRICULTURAL RESEARCH 76(1) JANUARY-MARCH 2016 3 ULY-SEPTEMBER The present study was conducted in order to investigate the adsorption and desorption behavior of tetramethylthiuram disulfide (thiram) using the batch equilibration technique in two soil namely: Ultisols and Inceptisols. The adsorptiondesorption isotherms were expressed by the Freundlich equation. The adsorptio...

A conceptually improved sensor network to monitor the partial pressure of CO(2) in different soil horizons was designed. Consisting of five membrane-based linear sensors (line-sensors) each with 10 m length, the set-up enables us to integrate over the locally fluctuating CO(2) concentrations (typically lower 5%(vol)) up to the meter-scale gaining valuable concentration means with a repetition t...

the geometric mean particle diameter (dg) and lime are two of the most important properties from the viewpoint of soil management. nowadays remote sensing technology which has emerged walking with science development throughout the world, has made soil study faster, more facile and more cost-efficient. an investigation of soil dg and lime was performed in pol-e-dokhtar area by use of four sets ...

Triazine-2-(14)C metsulfuron-methyl is a selective, systemic sulfonylurea herbicide. Degradation studies in soils are essential for the evaluation of the persistence of pesticides and their breakdown products. The purpose of the present study was to investigate the degradation of triazine-2-(14)C metsulfuron-methyl in soil under laboratory conditions. A High Performance Liquid Chromatograph (HP...

The effect of different tillage practices on soil hydraulic properties was studied in a mature, drip irrigated apricot orchard with a 7% slope, in Murcia (SE Spain). The soil had a loamy texture. Three soil tillage treatments were applied between the rows of trees: 1) control treatment (non-tilled, although weeds were cut to ground level using a blade attached to a tractor following the common ...