کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6539899 | 1421104 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Seed drill depth control system for precision seeding
ترجمه فارسی عنوان
سیستم کنترل عمق حفاری بذر برای کاشت دقیق
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کلمات کلیدی
کاشت بذر، سیستم کنترل عمق کوئلتر، جو بهاره، کاشت دقیق،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
نرم افزارهای علوم کامپیوتر
چکیده انگلیسی
An adequate and uniform seeding depth is crucial for the homogeneous development of a crop, as it affects time of emergence and germination rate. The considerable depth variations observed during seeding operations - even for modern seed drills - are mainly caused by variability in soil resistance acting on the drill coulters, which generates unwanted vibrations and, consequently, a non-uniform seed placement. Therefore, a proof-of-concept dynamic coulter depth control system for a low-cost seed drill was developed and studied in a field experiment. The performance of the active control system was evaluated for the working speeds of 4, 8 and 12â¯kmâ¯hâ1, by testing uniformity and accuracy of the coulter depth in relation to the target depth of â30â¯mm. The evaluation was based on coulter depth measurements, obtained by coulter position sensors combined with ultrasonic soil surface sensors. Mean coulter depth offsets of 3.5, 5.3 and 6.3â¯mm to the target were registered for the depth control system, compared to 8.0, 9.1 and 11.0â¯mm without the control system for 4, 8 and 12â¯kmâ¯hâ1, respectively. However, speed did not affect the coulter depth significantly. The control system optimised coulter depth accuracy by 15.2% and at 95% confidence interval it corresponded to an absolute reduction in the coulter depth confidence span of 10.4â¯mm. The spatial variability, due to variation in soil mechanical properties was found to be ±8â¯mm, across the blocks for the standard drill and when activating the coulter depth control system this variability was reduced to ±2â¯mm. The system with the active control system operated more accurately at an operational speed of 12â¯kmâ¯hâ1 than at 4â¯kmâ¯hâ1 without the activated control system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers and Electronics in Agriculture - Volume 144, January 2018, Pages 174-180
Journal: Computers and Electronics in Agriculture - Volume 144, January 2018, Pages 174-180
نویسندگان
Søren Kirkegaard Nielsen, Lars Juhl Munkholm, Mathieu Lamandé, Michael Nørremark, Gareth T.C. Edwards, Ole Green,