In a certain code language, if storm = 15, apple = 6,

Bray-1 test is used to determine phosphorous in

Which class of seed is exempted from certification?

Blue green algae is used for

Which soils are known as self-tilled soils

The ESP of saline soils is _____%

Soil texture is determined most commonly by which method? 

Which of the following is a source of Boron?

Which soil property is least affected by the size and arrangement of soil particles?

Which horizon of the soil profile is the zone where dominant features include the accumulation of clay, iron, aluminum, or humus, alone or in combination?

Indian Institute of soil and water conservation is situated at: