Jharkhand PSC Prelim Exam 2006 Solved Paper

(1) In agricultural land, generally plants like Sorghum(Jawar) have capacity to loosened the soil by the roots.
That leads to soil erosion.
Thats why inter cropping as well as mixed cropping is necessary for soil fertility.
Potato is also loosened soil but not in a capacity that Sorghum does. Wheat and clover helps to protect soil erosion.