The article presents the results of scientific-theoretical research on development mathematical modeling process collision seeder coulter with stones and introduction new technologies for sowing seeds agricultural crops stony soils to improve performance seeding units.

In Ethiopia, rice is one of the targeted agricultural products that has received adequate attention in promotion output. It regarded as "Millennium Crop" and anticipated to help ensure food security nation. As a result, over past few years, its production increased. Despite growth, there are still lot system issues need be resolved, with planting technique leading list. The farmers continued us...

A stable single-frequency pulsed laser is a critical element for lidar applications, such as high spectral resolution lidar, direct detection Doppler wind lidar and so on. We have designed a laser diode dual-end-pumped, single-frequency Qswitched Nd:YAG laser with 1064 nm wavelength output for the laser transmitter of lidar. Injection seeding is performed by utilizing an electro-optic phase mod...

The stable and uniformly distributed airflow field can effectively improve the seed suction effect seed-carrying stability of pneumatic seeder. With this end in view, paper was optimized basin structure vacuum-vibration tray precision seeder based on computational fluid dynamics (CFD) simulation technology. results show that is relatively well-distributed when chamber height 50 mm outlet tube d...

Fallstreak cirrus clouds are associated with supersaturated air, together with waves, instabilities and/or turbulence; however, their precise cause is usually uncertain. This paper uses already-published satellite, radiosonde and radar data, reanalysed to study some large fallstreaks which had been previously overlooked. The fallstreaks – up to 60 km long with a parent cloud 20 km wide – are ca...