The life test of the 30 cm diameter ion thruster developed by Lanzhou institute physics began in Apr. 2018 and ended Jan. 2020, lasting 6,500 h. This paper introduces results 6,500-h completed on ground, including ground facility for test, variations thrusters working performance, times breakdown power restart, erosion key components. show that performance parameters, such as thrust, specific i...

a study was conducted to investigate the effect of different planting densities and nitrogen doses on essential oil content and yield in herb and leaves of basil (ocimum basilicum l.). the research was conducted during 2007 and 2008 using split-plot randomized complete block design with four replications. the experiment consisted of four plant densities (30×20, 40×20 and 50×20 cm) as the main p...

plastic mulches have been used in vegetable production in the most parts of the world. in order to evaluate the performance of the colored plastic mulch and different plant density on cucurbita pepo var. rada, an experiment was conducted in agriculture faculty of ferdowsi university of mashhad during the cultural seasons at 2010. the experiment was arranged in factorial experiment based on rand...

Plots naturally infested with Rotylenchulus reniformis were sampled in the spring of 2006 and 2007 at depths of 15 and 30 cm in the bed, furrow over the drip tape, and "dry" furrow, and at approximately 40 to 45 cm depth in the bed and dry furrow. Then, 1,3-dichloropropene (Telone EC) was injected into the subsurface drip irrigation at 46 kg a.i./ha, and 3 to 4 weeks later the plots were resamp...

Use of solid agricultural digestate as a substitute for chemical fertilizers in Mediterranean cropping systems can be valuable approach to improving soil fertility. However, it is important accurately assess its mineralisation dynamics order avoid uncontrolled nutrient releases agroecosystems. With this aim, field experiment was conducted evaluate the effects application on total nitrogen (TSN)...