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Design, development and field assessment of a controlled seed metering unit to be used in grain drills for direct seeding of wheat

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A newcontrolled seed metering unit was designed and mounted on a common grain drill for direct seeding of wheat (DSW). It comprised the following main parts: (a) a variable-rate controlled direct current motor (DCM) as seed metering shaft driver, (b) two digital encoders for sensing the rotational speed of supplemental ground wheel (SGW) and seed metering shaft and (c) a control box to handle and process the data of the unit. According to the considered closed-loop control system, the designed control box regularly checked the revolution per minute (RPM) of seed metering shaft, as operation feedback, using its digital encoder output. The seeding ratewasdetermined based on the calculated error signal and output signal of the digital encoder of the SGW. A field with four different levels of wheat stubble coverage (10%,
30%, 40% and 50%) was selected for evaluation of the fabricated seed metering unit (FSMU). The dynamic tests were conducted to compare the performance of installed FSMU on the grain drill and equipped grain drill with common seed metering unit (CSMU) at three forward speeds of 4, 6 and 8 (Km/h) for DSW. Results of the FSMU assessment demonstrated that an increase in forwardspeed of grain drill (FSGD)andstubble coverage did not significantly affect the seeding rate in the grain drill forDSW. Using theFSMU reduced the coefficient of variation (CV) by approximately 50%. Consequently, applying the FSMU on the common grain drill led to a desirable seeding rate at different forward speeds of the grain drill and stubble existence.

Keywords:
Control box Seed metering mechanism Forward speed Seed drilling Field operation

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Ketersediaan

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Informasi Detail

Judul Seri

INFORMATION PROCESSING IN AGRICULTURE

No. Panggil

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Penerbit

: Elsevier B.V., 2015

Deskripsi Fisik

INFORMATION PROCESSING IN AGRICULTURE 2 (2015) 169–176

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

Food And Health

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

Lampiran Berkas

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