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Which furrow opener has toe and ‘T’ shaped scrapers?

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in Farm Machinery by (38.9k points)
Which furrow opener has toe and ‘T’ shaped scrapers?

(a) Reversible shovel

(b) Double disc type

(c) Spear point shovel

(d) Single disc type

I had been asked this question by my college professor while I was bunking the class.

Query is from Sowing Equipments topic in portion Sowing Equipments of Farm Machinery

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Right choice is (d) Single disc type

For explanation: Single type furrow opener consists of one concave disc. It consists of a curved disc made of hardened steel. It is set at an angle which while operating, shift the soil to one side making a small ridge. The disc is kept clean by two scrapers, one toe shaped at the convex side and one ‘T’ shaped at the concave side.

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