Find the missing term in the following series.

Which one is not related with 4-H club?

Bitter pit in apple is caused due to _____

Soil microorganism plays very important role in enhancing the fertility status of the soil. The Earthworm used for vermicompositing is

Problem of weed is more in case of

The law that determines the best uses of limited resources among alternative uses is known as:

The ultimate source of production of organic compound:

In paddy, the clipping of tip of seedlings is done as a preventive measure against which pest? 

Growing of two or more crops simultaneously on the same piece of land, without any definite row arrangement is known as

Which one of the following is variety of triticale

Which of the following is not a Rabi season crop?