منابع مشابه
Design and Fabrication of a Microwave Weed Killer Device for Weed Control Applications
In this paper, the design and the results of a microwave radiation system for agriculture applications is discussed. The system is fabricated and successfully tested on weed seeds. The device, which uses a commercial 1 kW magentron, proved to be effective for preventing the germination control of popular weeds of Iran. Seven weed species were tested separately by using this system and then the ...
متن کاملSusceptibility of Oregon Forest Trees and Shrubs to Phytophthora ramorum:
Phytophthora ramorum is a recently established invasive pathogen in some mixed-hardwood forests of central coastal California (10,11) and extreme southwestern Oregon (5). It also is known from horticultural nurseries and landscape plantings in Europe (12) and recently was reported from a few nurseries in California and Oregon (6,9). Symptoms are dramatically different on different host species....
متن کاملEffect of living mulches and conventional methods of weed control on weed occurrence and nutrient uptake in potato
The aim of the study was to determine the biomass, abundance and species composition ofweeds, as well as macroelement uptake in potato weeded using mechanical, mechanical–chemical and mechanical control combined with the sowing of living mulches of white mustard,common vetch, Persian clover and tansy phacelia. Abundance and biomass of the weeds was themost effectively limited by the mechanical ...
متن کاملthe effects of planning on accuracy and complexity of iranian efl students’ written narrative task performance
this study compared the different effects of form-focused guided planning vs. meaning-focused guided planning on iranian pre-intermediate students’ task performance. the study lasted for three weeks and concentrated on eight english structures. forty five pre-intermediate iranian students were randomly assigned to three groups of guided planning focus-on-form group (gpfg), guided planning focus...
15 صفحه اولAssessing the capacity of trees and shrubs species to accumulate of particulate matter (PM10, PM2.5 and PM0.2)
Background and Objective: Today, the presence and increase of particulate matter is one of the serious factors that threaten human health. In the meantime, trees can accumulate airborne particles by their foliage. In this study, the accumulating ability of various PM by the leaf of some tree and shrub species was evaluated in Isfahan. Materials and Methods: 12 species of trees and shrubs were ...
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ژورنال
عنوان ژورنال: Journal of Weed Science and Technology
سال: 2003
ISSN: 0372-798X,1882-4757
DOI: 10.3719/weed.48.supplement_188