The role of boron and zinc has been recognized in crop_________________?

A. Arctic
B. Sub-temperature
C. Semiarid
D. Semi arctic

A. Bacillus thuringensis
B. Bemisia tabaci
C. Bemisia trachyplerus

A. 5 irrigations
B. 6 irrigations
C. 8 irrigations

A. Chemical and cultural method
B. Only chemical control method
C. Chemical, cultural, and biological method
D. Only biological method

A. 75-90 NP kg/ha
B. 100-70 NP kg/ha
C. 110-60 NP kg/ha
D. 136-85 NP kg/ha

A. Nicolls &Heydecker (1968)
B. Kotowski (1962)
C. Baskin (1972)
D. Maguire (1962)