Q.71)-Bacteriophage virus is the--
- Bacterial virus
- Fungal Virus
- Algal virus
- Protozoal virus
Q.72)-Micro-organism,which can grow at higher temperature, is called
- Thermophils
- Mesophils
- Phycrophils
- None of these
Q.73)-Who has first time seen the micro-organism?
- Robert Koch
- John Tyndall
- Antonie van Leeuwenhoek
- Louis Pasteur
Q.74)-White colour of soil is due to the presence of -
- Silica
- Iron
- Manganese oxide
- All of these
Q.75)-Which of the 'complex fertilizer'?
- Ammonium sulphate nitrate
- Single superphosphate
- Ammonium phosphate
- Calcium ammonium nitrate
Q.76)-Drip irrigation is useful in which region?
- Humid
- Dry
- High rainfall
- None of these
Q.77)-Among the following crop rotations, which is good for in creasing soil Nutrient status?
- Rice-Wheat
- Groundnut-Wheat
- Pearlmillet-Wheat
- Sorghum-Wheat
Q.78)-For waterlogged rice cultivation, the fertilizer that may be avoided is -
- Sodium nitrate
- Urea
- Ammonium chloride
- None of these
Q.79)-The ratio between marketable crop yield and water used in evapotranspiration is known as--
- Field water use efficiency
- Field water use efficiency
- Consumptive use efficiency
- Water use efficiency
Q.80)-Penicillin acts on-
- Cell wall
- RNA
- Cell membrane
- None of these