In cotton, zn deficiency is known as_________?

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1. calcium is immobile in plants. Therefore, under conditions of deficiency, young tissue is affected first. calcium deficiency symptoms are:

   A. Death of terminal buds; roots tips also affected B. Abnormal dark green appearance of foliage C. Premature shedding of  blossoms & buds & weakened stem D. All of the above Submitted by: Shafiq-ur-Rehman...

2. The process of accumulation of excess quantity of nutrients in water causing O2 deficiency is known as_____________________?

   A. Eutrophication B. Nitrification C. Denitrification D. Sedimentation...

3. Loss of nitrogen in the form of NH3 in alkaline medium is known as_________?

   A. Denitrification B. Leaching C. Volatilization D. None of these Submitted by: Shafiq Rehman...

4. Process of mixing of soils is known as_________?

   A. Gleization B. Lessivage C. Laterization D. The correct option is not present above Submitted by: Shafiq Rehman...

5. Deficiency of B can be corrected through application of chemical fertilizer of_________________?

   A. Solubor B. Boric acid C. Borax D. All the above...

6. Phosphorus deficiency is widespread in most (_____%) 0f the soils of Pakistan.

   A. 54% B. 90% C. 68% D. 32% Submitted by: Shafiq Rehman...

7. The lower leaves turn yellow and in some crops they quickly start drying up as if suffering from shortage of water, stunted growth, leaves & fruits shedding & whole plant becomes yellow, are deficiency symptoms of:_________?

   A. Potash B. Nitrogen C. Calcium D. Both a & c Submitted by: Shafiq Rehman...

8. In cotton, jassids have non preference for______________________?

   A. Fregobract B. Okra leaves C. Smoothness leaves D. Hairiness of leaves...

9. Cotton fiber are made up of___________________?

   A. Cellulose B. Starch C. Fates D. Protein...

10. Which one is most dangerous insect of cotton crop?

    A. Spotted holl worm B. Jassids C. Both a & b D. Pink ball worm Submitted by: Shafiq Rehman...