Variation in the yield and composition of oil of cotton (Gossypium hirsutum) seed collected from two different sites (saline and non-saline) of Pakistan was examined. Hexane-extracted oil content of cottonseed from saline and non-saline areas was found to be 17.7 and 18.6%, respectively. No significant (P [ 0.05) differences in the refractive index (40°C), color, specific gravity (24°C), iodine, free fatty acid, peroxide, unsaponifiable matter, saponification, conjugated diene and triene and p-anisidine values of the oils of cotton plants from saline and non-saline habitats were observed. Fatty acid compositional analysis showed the concentration of stearic (C 18:0 ) and oleic (C 18:1 ) acids to be significantly (P 0.05) higher, whereas that of linoleic (C 18:2 ) acid was lower in cottonseed oils from the saline area than those from the non-saline habitat. Tocopherol contents of cottonseed oils were significantly (P 0.05) higher from the saline area than those from the non-saline area. The results of the present study showed that soil salinity did not affect the oil yield of cottonseed, however, it significantly (P 0.05) affected the tocopherol and fatty acid profiles of the oils examined.

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Rapidly increasing population and shrinking farm resources are threatening the future of food security in developing countries. Under such conditions, development of agroforestry systems to meet the increasing demand of food, forage and wood is urgently needed. The objective of present research was to evaluate comparative effect of nitrogen management sources viz inorganic and organic on wheat production in Acacia nilotica-and Eucalyptus camaldulensis-based agroforestry systems established in saline environments. Three experiments were conducted at Biosaline Research Station, Pakka Anna, Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan for two consecutive wheat cropping years (2011)(2012)(2013). Agroforestry systems included Acacia-and Eucalyptus-wheat based systems in addition to sole wheat cropping in open field conditions. Experimental treatments comprised of nitrogen fertilizer 60, 120 kg ha -1 and farmyard manure 20 Mg ha -1 each alone and in different combinations in addition to a control -with no nitrogen and farmyard manure applied in randomized complete block design. Application of organic manure and nitrogen fertilizer separately or combined under open and agroforestry systems influenced wheat crop. The results showed that different nitrogen levels had significant (p<0.05) effect on number of productive tillers, grains per spike, 1000-grain weight and grain yield in each alley cropping system. Performance of yield contributing attributes was found the best in open field system whereas reduction was observed in Acacia-and Eucalyptus-wheat based systems to varying extent. Based on two years average, maximum grain yield was obtained in open field followed by Acacia-and Eucalyptus-wheat based systems with application of N 60 kg+ FYM 20 Mg ha -1. These results suggest that farmers may adopt Acacia-based agroforestry systems for wheat production as compared to Eucalyptus-based systems for wheat productions in salt-affected areas.