Q.61)-Which of the following district of Tamil Nadu is not suitable for farming due to rising salinity in soil?
- Tiruchirappalli
- Nagapattinam
- Ramanathpuram
- Coimbatore
Q.62)-Soil factors are also known as-
- Biological factors
- Geo Morphological factors
- Ecological factors
- Edaphic factors
Q.63)-The Black soil related to which of the following crop-
- Cotton
- Sugarcane
- Tea
- Coffee
Q.64)-What is the name of the soil, rich in Calcium?
- Pedocal
- Pedalfer
- Podzol
- Laterite
Q.65)-Grau soil, like the Ash of Pine Forest, is also known as-
- Red and peat soil
- Tundra soil
- Podzol
- Gray soil
Q.66)-Which is the best suited soil for the cultivation of rice?
- Laterite soil
- Red soil
- Alluvial Soil
- Black soil
Q.67)-The red colour of red soil is due to-
- Nitrogen
- Humus
- Iron
- Copper
Q.68)-The soil which bleaches quickly due to rain,is called-
- Red
- Laterite
- Black
- Alluial
Q.69)-Why is crop rotation necessary?
- To increase the fertillityof soil
- To increase the quanitity of minerals
- To reduce the quantity of proteins
- To plough various types of crops
Q.70)-Which of the following method does not help in conservation of the fertility and moisture of soil?
- Contour ploughing
- Dry farming
- Strip cropping
- Shifting cultivation