For the cultivation of Tobacco, the soil should be rich in

(1) calcareous matter

(2) nitrogen

(3) organic content

(4) potash

Which of the following types of soil is best suited for cotton cultivation?

(1) Black

(2) Red

(3) Laterite

(4) Mountain

The soil which originates under tall-grass prairie vegetation is called

(1) Black soils

(2) Chestnut soils

(3) Chernozem soils

(4) Terra rosa soils

Mountain soil contains a lot of—

(1) humus

(2) clay

(3) coase material

(4) iron and aluminium salt

Which of the following methods does not help in conserving soil fertility and moisture?

(1) Contour plowing

(2) Dry farming

(3) Strip cropping

(4) Shifting agriculture

Which one of the following methods of soil conservation is most effective in arid areas?

(1) Mulching

(2) Shelterbelt

(3) Gully plugging

(4) Terracing

Which one of the following does not cause soil erosion?

(1) Deflation

(2) Deforestation

(3) Weathering

(4) Overcroppin

Soil erosion on hill slopes can be checked by

(1) Afforestation

(2) Terrace cultivation

(3) Strip cropping

(4) Contour ploughing

The crop mainly grown in hills is :

(1) sweet corn

(2) sweet jowar

(3) sweet potato

(4) sweet pea

Which one of the following practices is adopted for restoring the fertility of soil?

(1) Weeding

(2) Levelling

(3) Fallowing

(4) Harrowing

Which is a tropical food crop requiring a temperature of 270 C and a rainfall of more than 100 cm?

(1) Wheat

(2) Maize

(3) Rice

(4) Barley