Zobrazeno 1 - 10
of 23
pro vyhledávání: '"S. H. Karparvarfard"'
Publikováno v:
Journal of Agricultural Machinery, Vol 12, Iss 1, Pp 1-19 (2022)
All over the world, farmers choose different implements for tillage, which depend on crop type, soil type, the amount of plant residue from the previous crop, etc. Tillage implement selection is also affected by the availability of implements, power
Externí odkaz:
https://doaj.org/article/c16d0bd850824066acd4fb2269dedde0
Autor:
B Souri Damirchi Sofla, S. H Karparvarfard, A Ranjbar Karim Abadi, H Azimi-Nejadian, A Moazni Kalat
Publikováno v:
Journal of Agricultural Machinery, Vol 11, Iss 2, Pp 187-197 (2021)
IntroductionTillage is one of the most important field operations to improve soil structure and physical conditions and provide the proper plant site. Conservation tillage is one of the methods of tillage that reduces tillage costs. The blade is one
Externí odkaz:
https://doaj.org/article/1d11e5777f7641d5b9372ae88e851f93
Publikováno v:
Journal of Agricultural Machinery, Vol 11, Iss 1, Pp 17-27 (2021)
In this study, a model was developed for predicting the seeding rate of corn seeds of a typical row-crop planter equipped with a multi-slot feeding device. To this, nine multi-slot rotors (with 4, 5 and 6 slots in three angles of mouth including 23°
Externí odkaz:
https://doaj.org/article/01e6eb7302e047b4abc295b4d8cdfd9e
Publikováno v:
Journal of Agricultural Machinery, Vol 10, Iss 2, Pp 273-287 (2020)
Introduction Due to problems such as water resources constraints, poor soil and soil organic matter, and the problems related conventional tillage, the attention paid to protective tillage equipment should be taken into consideration by farmers. Toda
Externí odkaz:
https://doaj.org/article/f1a10d4088e349c488b184bf117c24e0
Publikováno v:
Journal of Agricultural Machinery, Vol 9, Iss 2, Pp 415-426 (2019)
Introduction Pneumatic conveying is a continuous and flexible material handling method which uses positive or negative air pressure to convey materials in pipe. This conveying system is generally divided into two groups of dilute and dense phase. The
Externí odkaz:
https://doaj.org/article/e9b96c431c4a43fc93aec0db30ef5b51
Publikováno v:
Journal of Agricultural Machinery, Vol 8, Iss 1, Pp 43-53 (2018)
Introduction One of the problems which considered in recent years for grain harvesting is loss of wheat during production until consumption and tenders the offers for prevention of its especially in harvesting times by combine harvesting machine. Gra
Externí odkaz:
https://doaj.org/article/7f8b63286d124cc4ac66a225ff86fd1c
Modeling and Optimization of Wing Geometry Effect on Draft and Vertical Forces of Winged Chisel Plow
Autor:
M. R Salar, S. H Karparvarfard
Publikováno v:
Journal of Agricultural Machinery, Vol 7, Iss 2, Pp 468-479 (2017)
Introduction The dynamic response of soil on tillage tools, is an important factor in determining their performance. For a tractor with a certain size, a reduction in draft force, the working width and speed of tools can rise and result in increasing
Externí odkaz:
https://doaj.org/article/84c2b21d7b8b4ed6a9a818a537d78413
Autor:
A Mondani, S. H Karparvarfard
Publikováno v:
Journal of Agricultural Machinery, Vol 6, Iss 2, Pp 283-297 (2016)
Introduction Maximum efficiency of natural resources, reduced risk of production, improved fertility of soil, and increased production per area enjoyment have made intercropping a preferential practice compared with cropping. One of the fundamental p
Externí odkaz:
https://doaj.org/article/6c7b632f7a504d21a6911951e5db851c
Publikováno v:
Journal of Agricultural Machinery, Vol 6, Iss 1, Pp 1-13 (2016)
Introduction: Automatic guidance of tractors in the mechanized farming practice has taken the attention of agricultural engineers in the last two decades. For this to be truly practical on the farm, it should be economical, simple to operate and enti
Externí odkaz:
https://doaj.org/article/c8f57b80e59843fcb049d35700e38923
Autor:
Homayoun Emdad, M. H. Raoufat, Hossein Rahmanian Koushkaki, Khosrow Jafarpur, S. H. Karparvarfard
Publikováno v:
Biosystems Engineering. 189:133-149
This research was devoted to establishing a dimensionless model for estimating mixture friction factor based on the Buckingham Theorem. An experimental test-rig with conveying pipeline of 40 mm I.D was designed, assembled and used to collect the data
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb705bdcb1111692248278a9a0f6e819
https://doi.org/10.1016/j.biosystemseng.2019.11.015
https://doi.org/10.1016/j.biosystemseng.2019.11.015