If the same crop is repeatedly grown in a field:

Related Mcqs:

1. In a fish aquarium green aquatic plants are grown primarily for:

   A. Oxygen B. Carbon dioxide C. Fish feed D. Decoration...

2. Common combinations of the agroforestry system in Pakistan are: Trees species: Agricultural crops grown with trees:

   A. Poplars: wheat / maize / turmeric / sugarcane / vegetables / fodder B. Eucalypts: wheat/sunflower/tomatoes/potatoes/chilies C. Simal: maize/sunflower/vegetables/fodder D. Shisham: turmeric/wheat/maize/vegetables E. All of the above...

3. When cane plants grown in the forest, they scamble over other vegetation and this corresponds to:

   A. Commensalism B. Competition C. Exploitation D. None of these...

4. The device or structure where plants are grown in a controlled environment:

   A. Culture chamber B. Inoculation chamber C. Phytotron D. All of these...

5. Commonly grown flowering shrubs and trees are:

   A. Delonix regia, Bojer B. Millettia ovalifolia, Kurz C. Erytherina glabrescens, Parker D. Cassia fistula, Linn E. All of the above...

6. The plants commonly sown for crop rotation are :

   A. Cajanus and Dalbergia B. Cajanus and Aeschynomene C. Dalbergia and trigonella D. Trigonella and Trifolium...

7. To prevent wind and water erosion, the crop is sometimes harvested in such a way that a basal stub of the plant is left behind. This phenomenon is called:

   A. Ley farming B. Mulching C. Basin listing D. Strip cropping...

8. Rotation of crop is essential for:

   A. Increasing fertility of soil B. Increasing quality of protein C. Getting different kinds of crops D. Increasing quality of minerals...

9. Opening of canopy irregular and gradual, young crop somewhat uneven-aged:

   A. Uniform system B. Group system C. Irregular system D. Strip system...

10. _________ consists of a crop arranged in two different stories, one above the other; each story being approximately even-aged not of seedling as opposed to coppice origin:

    A. Two-storied high forest B. Three-storied high forest C. Four-storied high forest D. Five -storied high forest...