Staff Nurse Entrance
Staff Nurse Entrance
41. If fertilizers are added to fresh water
- Plants will die
- Overall animal population will increase
- Eutrophication will occur
- Fish population will decrease
43. The science concerned with vegetable culture is called
- Floriculture
- Olericulture
- Horticulture
- Agriculture
44. A water-fern, which is used as a green manure in rice fields, is
- Salvinia
- Mucor
- Aspergillus
- Azolla
45. Which of the following elements is not present in a nitrogenous base?
- Hydrogen
- Carbon
- Phosphorus
- Nitrogen
46. Although a deficiency of any one of the elements listed may result in chlorosis, only one of these elements is an element found in chlorophyll. Which is it?
- Zinc
- Iron
- Magnesium
- Chloride
47. Green manure plants used by farmers mainly belong to
- composite
- Leguminous
- Solanaceae
- Poaceae