In a sugarcane field the net productivity in terms of kg/m2/year, is:

Related Mcqs:

1. Which of the following habitats is most unsuitable for primary productivity:

   A. Meadow
   B. Forested river bank
   C. Cave
   D. Pond

2. The primary productivity is minimum in the following ecosystem:

   A. Tropical rainforest
   B. Temperate grassland
   C. Tropical deciduous forest
   D. Desert shrub

3. Which of the following ecosystem has highest gross primary productivity:

   A. Grassland
   B. Coral reefs
   C. Mangroves
   D. Rain forest

4. Which ecosystem has the highest primary productivity?

   A. Pond ecosystem
   B. Lake ecosystem
   C. Grassland ecosystem
   D. Forest ecosystem

5. According to Lindemann, the total solar input in terms of gcal/cm2/year is:

   A. 112,887
   B. 118,872
   C. 181,872
   D. 112,788

6. Aerosols reduce primary productivity by:

   A. Decreasing O2
   B. Reducing photosynthesis
   C. Competing with CO2
   D. Being toxic to chloroplasts

7. The reservoir of Mangla is being silted at the rate of 48.27 million m3 per year and that of Tarbela at the rate of _____ million cubic meters per year:

   A. 160.5
   B. 167.75
   C. 170.6
   D. 175.8

8. Tarbela dam is being silted at ______ acre feet per year while Mangla is being silted at a rate of _____ acre feet per year due to misuse of their watershed area:

   A. 109000, 42,000
   B. 110000, 43000
   C. 115000, 44,000
   D. None of these

9. According to Odum, the percentage of net primary production of total light intake is:

   A. 10%
   B. 0.15%
   C. 1%
   D. 1.50%

10. According to Lindemann, the percentage of net production passed on to carnivores is:

    A. 28.6
    B. 26.8
    C. 22.6
    D. 22.8