Agriculture › Soils

Which of the following statements regarding laterite soils of India are correct?
(1). They are generally red in colour.
(2). They are rich in nitrogen and potash.
(3). They are well-developed in Rajasthan and UP.
(4). Tapioca and cashew nuts grow well on these soils.
Select the correct answer using the codes given below.

Which of the following adds/add nitrogen to the soil?
(1). Excretion of urea by animals
(2). Burning of coal by man
(3). Death of vegetation
Select the correct answer using the codes given below.

Contour bunding is a method of soil conservation used in