prediction of weed emergence timing would help minimize crop yield loss and reducing herbicide use by optimization of the timing of weed control. therefore, seedling emergence evaluation was conducted in different irrigation levels (40, 60, 80, 100 percent of crop water requirement and furrow irrigation) to develop a thermal time seedling emergence model for amaranthus retroflexus l. in sunflow...

at the crop level, the drought stress accounts for most variations in yield. a controlled glasshouse investigation at day/night temperatures of 22/15°c based at perth city, western australia was performed (in 2006) to assess the influence of different soil moisture contents (field capacity percentage basis) on emergence as well as early plant growth in twenty chickpea genotypes. the experiment ...

Low soil temperature is one of the reasons for poor germination and establishment of maize. The aim of this study was to evaluatethe possibilityof improvingthe seedling emergence and performance of maize under low temperature stress. A pot experiment was conducted on Zea maize (single cross 704) at 14 ºC as cold stress and seed treatments were priming with  200,  300 and 400ppm of GA3; 100, 200...

q fever is a worldwide zoonosis with many acute and chronic manifestations caused by the pathogen coxiella burnetii . farm animals and pets are the main reservoirs of infection, and transmission to human beings is mainly accomplished through inhalation of contaminated aerosols. persons at greatest risk are those in contact with farm animals and include farmers, abattoir workers, and veterinaria...