http://localhost:80/xmlui/handle/123456789/16578 2026-04-06T14:01:36Z 2026-04-06T14:01:36Z S. TARIQ MAHMOOD A. MAHMOOD http://localhost:80/xmlui/handle/123456789/16888 2023-02-03T07:29:16Z 1989-06-11T00:00:00Z

Title: EFFECT OF SEA WATER SALINITY ON NODULATION AND NITROGEN FIXATION IN PROSOPIS JULIFLORA (Swartz) DC. Authors: S. TARIQ MAHMOOD; A. MAHMOOD Abstract: Fifty six day old Prosopis juliflora seedlings were subjected to 40, 50, 60, 70 and 80% sea water treat¬ment for one month. After 86 days the morphology of nodules, root-shoot ratio and total nitrogen content in root and shoot were analysed. Nodules showed morphological alterations in size.and shape. Root-shoot ratio was lowest in the control and showed a gradual increase with increasing sea water concentrations. The amount of nitrogen in the stem and leaves showed a gradual decrease due to disturbance in the translocation of diva¬lent cations to the aerial parts, while roots registered a gradual increase with increasing sea water concentra¬tions due to accumulation of assimilated nitrogen in the roots.

1989-06-11T00:00:00Z D. KHAN S. ISMAIL R. AHMAD http://localhost:80/xmlui/handle/123456789/16872 2023-02-03T04:12:14Z 1989-06-10T00:00:00Z

Title: FIELD TRIAL OF AZADIRACHTA INDICA (L.) A. JUSS. UNDER HIGHLY SALINE WATER IRRIGATION AT ARID SANDY COASTAL REGION OF PAKISTAN Authors: D. KHAN; S. ISMAIL; R. AHMAD Abstract: In a field trial at sandy arid coastal land of Bhawani (Gaddani Coast, Baluchistan) Azadirachta indica (L.) A. Just., plants irrigated with highly saline (EC;10.0-15.3 dS.rn-') and sodic (irrigation quality: C.Sz; SAR: c. 28) underground water exhibited relative inhibition of growth in height during winter months. Such inhibition was more conspicuous in stem diameter of the treated plants which was overcome after rainfall (100mm) in April with no difference in height or stem diameter after one year of post-transplantation growth. Saline water irrigation induced no significant change in foliar concentration of moisture, chlorophyll, protein, praline and cations such as Na', IC*, and Mg". Ca" content declined by 41.78% in leaf. Saline irrigation sub¬stantially increased salt content in the upper profile of soil with SAR just on and beyond the critical value, whereas, rainfall (c. 100mm) during April washed down the salts thus reducing the salt content to the same level as tl.at in the virgin soil.

1989-06-10T00:00:00Z S.M. ALAM S.S.M. NAQVI A.R. AZMI R. SULTANA http://localhost:80/xmlui/handle/123456789/16871 2023-02-03T04:10:08Z 1989-06-09T00:00:00Z

Title: EFFECT OF N-SOURCES ON GROWTH OF WHEAT Authors: S.M. ALAM; S.S.M. NAQVI; A.R. AZMI; R. SULTANA Abstract: Effect of urea, (NH4)NO, and NI-14C1 on the growth of wheat cv. Lu-26-S in sandy clay loam was stud¬ied. N fertilizers significantly increased plant height, number of tillers, straw weight and grain yield with marked effects where urea was used. Maximum uptake of N, P and K by wheat plant was recorded under urea fertilization, indicating urea as a better N-source for growth of wheat

1989-06-09T00:00:00Z R. ALIYA GINA ARCE http://localhost:80/xmlui/handle/123456789/16870 2023-02-03T04:08:45Z 1989-06-06T00:00:00Z

Title: STUDIES ON PHOTOSYNTHETIC RATES AND SPECIES COMPOSI-TION OF AN EPILITHIC PERIPHYTON COMMUNITY IN A STREAM AT FRESNO, CALIFORNIA Authors: R. ALIYA; GINA ARCE Abstract: An epilithic periphyton community showed significant seasonal changes in species composition, abun-dance, and photosynthetic rates in a slow-flowing, manmade stream. Blue green algae were dominant during summer, diatoms were dominant during spring and winter, and green algae dominated the community during fall. The highest photosynthetic rates were found in winter with 24°C as the optimum temperatures for produc-tion in all seasons.

1989-06-06T00:00:00Z