निम्नलिखित में से pious  शब्द का अर्थ नहीं है ? 

Microbe involved in biological oxidation of ammonium ion to nitrite ion is

Match the following:

The disorder of carrot that occurs due to undecomposed manure and hard soil pan

In water logged soils maximum microbes found are

……………………………is a key factor for successful crop production and it is a measure of capacity of soil to supply plant nutrients.

Which of the following groups of nutrients is absorbed by plants only in anionic form?

Tillage increases the water holding capacity of soil but it reduces the …………………….

Study of soil in relation to growth and development of plant is known as:

In terms of the order from youngest to the oldest soil, which one of the following is the correct chronological sequence?