Historical Development of Soil Science/Agriculture Francis Bacon (1561-1624 A.D.): Found the water as nutrient of plants. Van Helmont (1577-1644): Give the ideas about the role of soil as a simple source of water and minerals for the plants.

1. White alkali soils also know as a. Acid soil                  b. Saline soil c. Saline sodic soil    d. Sodic soil

1. Amoeba are unicellular organisms that feed on a. Bacteria and algae     b. Bacteria and fungi c. Fungi and algae        d. Nematode and fungi

1. Central Fertilizer Quality Control & Training Institute (CFQC&TI) is situated at a. Mysore           b. Karnal c. Faridabad        d. Coimbatore

1. The smallest size soil separate is a. Sand      b. Silt c. Clay        d. Loam

 1. A mineral that forms an original component of rock is called a. Primary         b. Secondary c. Essential         d. Accessory