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Articles by M. Zameer Khan
Total Records ( 4 ) for M. Zameer Khan
  M. E. Akhtar , M. Zameer Khan , Sagheer Ahmad and Maqbool Akhtar
  Response of dryland wheat to nitrogen, phosphorus and potash fertilizer application in different combinations was studied to assess a suitable dose for maximum economic yield. Maximum response in terms of grain yield was found to N followed by P and K application, on overall basis. On the basis of two years results, application of each kg of N (in the presence of P and K) increased 7.78 kg grain at the highest rate. In case of P and K, each kg of P2O5 and K2O (in the presence of other two nutrients) gave an average increase in yield of 6.65 and 4.36 kg, respectively. Application of 100 kg N ha -1 along with 60 kg P2O5 and 150 kg K2O ha -1 produced the maximum grain and straw yield.
  M. Ehsan Akhtar , M. Zameer Khan , Sagheer Ahmad and Khurram Bashir
  A pot experiment was conducted to investigate the effect of K application on Shujabad and Missa soil series on six wheat cultivars. Nitrogen and P were applied @150 mg N and 75 mg P2O5 kg-1 with two levels of K (0 and 150 mg K2O kg-1) as muriate of potash. Relatively large quantities of shoot biomass were produced in Missa than Shujabad soil. Irrespective of soils and cultivars, the application of K increased shoot biomass of all the cultivars except NR-37. In Shujabad soil, Rawal-87 and in Missa soil Inqlab-91 had higher nitrogen while Sariab-92 and Chakwal-86 the minimum on Shujabad and Missa soils, respectively. The potassium contents of all the wheat cultivars increased with the addition of K fertilizer. Maximum K was found in Chakwal-86 while minimum in Sarib-92. It was observed that Sariab-92 had much less Cl¯ content than the other cultivars, however its biomass increased with MOP application as compared to control whereas NR-37 had the maximum Cl¯ contents. Nitrogen, P, Mg and S in most of the cultivars decreased over the control. The results showed that the behavior of wheat cultivars and their response to K application differed on two soils.
  M. Ehsan Akhtar , Aneela Sardar , M. Ashraf , Maqbool Akhtar and M. Zameer Khan
  A pot experiment was conduced in a glasshouse at the National Agricultural Research Centre (NARC), Islamabad to study the effect of application potash on boll weight, boll size and seed cotton yield in selected cotton varieties, namely CIM-443, CIM-109 and CIM-446 during summer 1999. Potash as MOP was applied @ 0, 100 and 200 kg K2O ha-1 along with basal application of N and P @ 150 and 75 kg P2O5 ha-1. The results showed that boll weight and size increased significantly with increasing K2O levels of application and they were maximum at 200 kg K2O ha-1. However, no significant difference was observed in the boll size of different varieties. Seed cotton yield also increased significantly in all the varieties with increasing K2O. The magnitude of response was variable and maximum response was observed in case of CIM-446 followed by CIM-109 and CIM-443.
  Maqbool Akhtar , Khurram Bashir , M. Ehsan Akhtar , M. Zameer Khan and Shahid Rafiq Ch.
  A field experiment was conducted to study the effect of timing of the last dose of split nitrogen application on agronomic traits and nutrient contents of sugarcane. The study was carried out at the National Agricultural Research Centre Islamabad during 1996-97. Application timing of the last dose of nitrogen did not affect early stalk population, millable canes, stalk height, stalk girth and total soluble solids (TSS). Application of last dose of N at early stage (last week of March) produced significantly lower cane yield than other timings of N application. Maximum cane yield of 146 t ha–1 was produced when the last dose of N was applied during the first week of June. Cane yield produced with the application of last dose of N either the mid May or the first week of July produced statistically similar cane yield that was produced with the application of last dose of N during first week of June. Sugar recovery was significantly decreased with the late application (July 1st week) of the last dose of N. Maximum sugar yield (15.70 t ha –1 ) was produced when the last dose of N was applied during the middle of May. P, K, Zn and B contents were not affected with the timing of application of nitrogen. However, Mg contents of the tissue increased significantly as the application of the last dose of nitrogen was delayed.
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