A. Air
B. Water
C. So
D. All the above
Agronomy
Generally field crops are cultivated at altitude………………?
A. 20004000 ft
B. 0008000 ft
C. 1200014000 ft
D. 02000 ft
The condition of drying of plant parts due to lack of water is called………………?
A. Water stress
B. Drought
C. Wilting
D. None of the above
Due to phosphorus deficiency in plants………………..?
A. Roots do not develop properly
B. Plants mature late
C. Poor flowering and fruil selling occurs
D. All the above
the layer of atmosphere which blocks ultraviolet radiation from sun is……………….?
A. Stratosphere
B. Ozone
C. Ozosphere
D. All the above
Partially decomposed organic matter is termed as……………….?
A. Humus
B. Farm yard manure
C. Composet
D. All the above
Narcotic crops mainly grown in Pakistan is……………..?
A. Pyrethrum
B. Cocon
C. Tobacco
D. Co see
Highly decomposed stage of organic matter is called……………?
A. Cellulose
B. Organic acid
C. Humus
D. All the above
Cultivation of same crop year after year is called…………….?
A. Single cropping
B. Monocropping
C. Double, cropping
D. All the above
The oxygen concentration in the air is…………….?
A. 30%
B. 21%
C. 16%
D. 45%