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