What should come in place of? in the given series?

Tomato damping off is caused due to ____

Which of the following factor is not a primary cause of soil erosion? 

A soil with a PH value of 8 is considered 

The Green Manure crop that shows stem nodulation is 

Which of the following crop is used for flax and oil both?

Site for protein synthesis is _______

What is the term for the process of removing parasites such as ticks and lice from livestock?

Which method of plant breeding involves Crossing to plants with desirable traits followed by self-pollination? 

The law of diminishing return was proposed by