# A precision seed planter can plant 10 seeds per revolution of the metering plate with a row to row distance of $450 \mathrm{~mm}$ at a speed of $6 \mathrm{~km} \mathrm{~h}^{-1}$. A plant population of 36 plants per square meter is desired for the crop. The germination percentage of the seed is $90 \% .$ If the planter ground wheel has a rolling radius of $350 \mathrm{~mm}$, the speed ratio of metering plate to the ground wheel required to obtain the desired plant population is_______________

## Question ID - 156529 :- A precision seed planter can plant 10 seeds per revolution of the metering plate with a row to row distance of $450 \mathrm{~mm}$ at a speed of $6 \mathrm{~km} \mathrm{~h}^{-1}$. A plant population of 36 plants per square meter is desired for the crop. The germination percentage of the seed is $90 \% .$ If the planter ground wheel has a rolling radius of $350 \mathrm{~mm}$, the speed ratio of metering plate to the ground wheel required to obtain the desired plant population is_______________

3537

Answer Key : (3.90 to 4.10) -

3.90 to 4.10

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The elevations of pressure gauge and porous cup of the tensiometer installed in unsaturated zone are $145.8 \mathrm{~m}$ and $144.2 \mathrm{~m},$ respectively. Pressure measured at the gauge is $-19.62 \times 10^{3} \mathrm{~N} \mathrm{~m}^{-2}$. The specific weight of water is $9810 \mathrm{~N} \mathrm{~m}^{-3}$. The estimated pressure at the porous cup is_____________ $\mathrm{N} \mathrm{m}^{-2}$