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Articles by M.A. Chang
Total Records ( 4 ) for M.A. Chang
  Rehana Anjum , A. R. Soomro , Saira Bano , M.A. Chang and A. M. Leghari
  Impact of fruiting positions on Seed cotton yield was studied in four commercially grown varieties of Sindh in an experiment conducted during 1996 cotton season. The first fruiting position contributed significantly highest percentage of the total seed cotton yield and number of bolls per plant in all the four cultivars ranging from 22.49 to 43.24 and 22.74 to 42.11 percent, respectively. Similarly, the second fruiting posrdon ranked second in order and contributed 16.87 to 28.68 and 17.81 to 28.15 percent of the total seed cotton yield and number of bolls per plant, respectively in all the cultivars. The results demonstrated that the first four positions on sympodial branches were more important than the remaining fruiting positions as their contribution ranged from 63.66 to 93.86 percent in case of seed cotton yield per plant and 65.35 to 92.46 percent in case of number of bolls per plant. The remaining four positions contributed 5.21 to 16.04 percent seedcotton yield and 6.60 to 16.29 percent number of bolls per plant. The monopodial branch was considered as the ninth position and it is very interesting to note that only in case of Reshmi, the ninth position contributed significantly highest percent of seedcotton yield and number of bolls per plant 20.30 and 18.36 respectively than all other varieties and collectively contribution of 5th to 8th positions. Thus from the cotton management point of view the first four positions were most important.
  Rehana Anjum , A.R. Soomro and M.A. Chang
  The study was conducted on four advance cotton strains and one commercial cultivar developed by CCRI Sakrand to establish the early maturing variety during 1997 cotton season. The results demonstrated that 58 days after planting (DAP) all the cultivars developed more than 8 NAWF with non-significant difference in their growth and development. However at 65 and 74 DAP significant difference was observed. Commercial cultivar CRIS-9 developed highest number (7.9) of NAWF at 65 DAP and (5.45) at 74 DAP, while CRIS-133 developed lowest number (6.5 and 4.15) of NAWF during the same period. Similarly CRIS-52, CRIS-133 and CRIS-134 developed less than 5-NAWF at 74 DAP suggesting that these cultivars ceased to grow further and moved towards maturity. CRIS-133 was observed as early where as CRIS-9 as late maturing variety in the test.
  Rehana Anjum , A.R. Soomro and M.A. Chang
  Earliness studies were carried out on four strains (CRIS-19, CRIS-52, CRIS-133, CRIS-134) and one commercial variety CRIS-9 developed by CCRI Sakrand, during 1997 cotton season by evaluating five characters viz., plant height, main stem node number bearing 1st sympodial branch, number of days to bloom first flower / boll and number of days to attain 5-NAWF (Nodes Above White Flower) stage for their effectiveness in measuring earliness. The results demonstrated that the advance strains tested were 2 to 3 days earlier than CRIS-9 in opening their first flower, 2 to 6 days in attaining the stage of 5 - NAWF stage and 7 to 10 days in opening their first boll. It was also found that the characters attaining date of 5-NAWF stage and date of opening first boll were more reliable indicators of earliness as compared to others.
  Rehana Anjum , A.R. Soomro , M.A. Chang and A. M. Memon
  Fruiting position effects on seedcotton yield were studied on four advance cotton strains and one commercial cultivar developed by CCRI Sakrand. The results demonstrated that the first three positions on sympodial branches were more important than the remaining fruiting positions. The first fruiting position contributed significantly highest percentage of the total seedcotton yield per plant in all the five cultivars ranging from 55.91 to 63.46 % . The second fruiting position ranked second in order and contributed 26.33 to 31.43 % of the total seedcotton yield per plant in all the cultivars. In case of CRIS-9 and CRIS-19, third, fourth and fifth position contributed 10.65 to 7.04%, 3.57 to 3.61 % and 1.38 to 2.05 % of the total seedcotton yield per plant. While in case of CRIS-52, CRIS-133 and CRIS-134, third and fourth fruiting position contributed 8.18 to 9.19 % and 0.93 to 4.64 % respectively of the total seedcotton yield per plant. Collectively the first three positions contributed about 95 to 97 % of the total seedcotton yield per plant in all the cultivars. Thus from the cotton management point of view the first three positions were most important.
 
 
 
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