Question

An animal drawn 3*20 wheat seed drill is equipped with a fluted roller type metering mechanism. What will be the exposed length of the fluted roller for each row if the machine is to be calibrated for seed rate of 100 kg/ha. Assuming there is no slippage in the ground wheel or in the transmission during field operations.

(a) 0.0395 m

(b) 0.0495 m

(c) 0.0595 m

(d) 0.0695 m

I have been asked this question in quiz.

This interesting question is from Sowing Equipments in division Sowing Equipments of Farm Machinery

Answer 1

Right choice is (a) 0.0395 m

Easy explanation: Vol of seed in one revolution = n*\(\frac{π*Df^2*l}{8} = \frac{12*π*0.009^2*l}{8} \)

Seed spacing = π*Ng*Dg = π*0.6*3 m

Area = π*0.6*3*0.2 m^2

Volume of seed in one revolution = \(\frac{100}{750}*\frac{π*0.6*3*0.2}{1000} \)

\(\frac{100}{750}*\frac{π*0.6*3*0.2}{1000} = \frac{12*π*0.009^2*l}{8} \)

L = 0.0395 m.