Soil is the surface layer of the land. It includes a number of factors which collectively form the soil complex. Disease the following:
What is significance of presence of humus in the soil?

Soil is the surface layer of the land. It includes a number of factors which collectively form the soil complex. Disease the following: What is soil profile?Write one main feature of each of various soil layers.

Soil is the surface layer of the land. It includes a number of factors which collectively form the soil complex. Discuss the following: How the distribution of vegetation depends upon the nature of soil?

Which of the following is a free-living nitrogen-fixing bacteria present in the soil?

Which of the following soils is transported by air?

Which one of the following is not a method of soil conservation?

Which of the following plants are used as green manure in crop fields and in sandy soils?

Which one of the following helps is absorption of phosphorus from soil by plants?

Fifty seeds were selected at random from each of 5 bags of seeds, and were kept under standardised conditions favourable to germination. After 20 days, the number of seeds which had germinated in each collection were counted and recorded as follows: What is the probability of germination of 49 seeds in a bag?