Mesopotamia Journal of Agriculture

Afield experiment was carried out during the winter seasons of 2008-2009 and 2009-2010 in Salamya which is located at 34 Km southern from Mosul city. The split plot arrangement in Randomized Complete Block Design (R.C.B.D) with three replications was used. The experiment included four levels of biofertilization EM1 (0, 1, 2, 3 cc/Liter), five levels of nitrogen fertilization (0,30,60,90,120Kg N/ha). Nitrogen fertilization levels and biofertilization EM1 were represented as Main plots, and sub plots respectively. The results indicated that biofertilization EM1 level 3 cc/Liter was significantly superior in all growth traits and yield in both seasons with the exception of harvest index in first season it was significantly superior in stem length, leaf area, biological yield, number of spike per m², spike length, number of grains per spike, weight of 1000 grains, grain yield,protein percentage and yield.Nitrogen fertilization level 120Kg N/ha was significantly superior in all growth traits and yield witch is stem length, leaf area, biological yield, number of spike per m² , spike length, number of grains per spike, weight of 1000 grains, grain yield, harvest index,  protein percentage and yield in both seasons . Biofertilization EM1 and Nitrogen fertilization interacted significantly for all growth and yield characters in both seasons, biofertilization EM1 level 3 cc/Liter and Nitrogen fertilization level 120Kg N/ha  interaction was significantly superior in all growth traits and yield in both seasons with the exception of harvest index which was at the interaction between biofertilization EM1 level1cc/Liter and nitrogen fertilization level 120Kg N/ha.

The current study is carried out the effect of Nitrogen fertilization in levels (0, 46, 92, 138) kg/h and spraying of gibberllic acid at concentration (0, 50, 100) ppm and the Algamix at concentration (1,2) ml/L in percentage ratio for concentration of some active constituents for the oil of two species of Mentha (M. piperita and M. spicata). The result was showed, that the samples of oil was contained the following compounds: (Camphor, Menthone, Menthyl acetate, Menthol and Thymol), using the Gas-liquid Chromatography technique (GLC). It's illustrated that the summer harvest was exceeded to gave the highest concentration of menthone compounds about 11.47% without fertilization (N0) with spraying of algamix at concentration 1 ml/L of M. spicata, as well as thymol compound about 16.69% in fourth level of fertilization 138 kg/h with out spraying of M.spicata too. While, the autumn harvest was exceeded increasing percentage of camphor compound about 0.20% in the fourth level of fertilization 138 kg/h with spraying of algamix at concentration 1ml/L of M. piperita and Menthol compound which was presented 46.50% in the second level of fertilization 46 kg/h without spraying, and also Menthyl acetate at concentration 50.06% in the same level of fertilization of M. piperita with spraying of Algamix at concentration 1ml/L.

A field experiment was conducted to investigate the influence of Biofertilizer
EM1, Nitrogen fertilization and removing the leaf under ear on growth traits, grain yield and its components of corn (Zea mays L.), in two locations for the autumn season 2009. The first location was in Mosul City، while the second was in Salamya 34 Km southern Mosul city. The split- split plot arrangement in Randomized Complete Block Design (R.C.B.D) with three replications was used. The experiment included four levels of Biofertilizer EM1 (0, 0.5, 1, 1.5 cc/Liter), two levels of Nitrogen fertilization (zero, 120Kg N/ha) and two treatments of removing and non removing of leaf under ear . Nitrogen fertilization levels, Biofertilizer EM1 and removing leaf under ear were represented as Main plots, sub plots and sub sub plots respectively. The results indicated that nitrogen fertilization level 120kg N/ha was significantly superior as compared with non nitrogen fertilization in all growth traits: number of days to 75% flowering، stem length, leaf area, leaf area index، leaves and stem dry weight. Grain yield and its components: ear length, number of rows per ear, number of grains per rows، weight of 500 grains، grains yield and harvest index. Grain quality: protein percentage and yield, oil percentage and yield in both locations. Increasing of Biofertilizer EM1 levels caused significant increase in all growth traits, grain yield and its components and grain quality in both locations. Removing the leaf under ear was significantly superior compared with non removing in all growth traits, grain yield and its components and grain quality in both locations.

The present study was carried out in laths house to study the effect of four levels of fertilizer (0.0, 1.0, 1.5 and 2.0) g as ammonium sulphate (21% N) and four levels of Phosphate fertilizer (0.0, 0.5, 1.0, 1.5) g as tri-super Phosphate (45% P2O5) per pot diameter 30 cm, mixed with soil surface on the vegetative growth and chemical content of Yucca aloifolia L. plants. The results refers that all studies parameters affected significantly by Nitrogen fertilization and Phosphate fertilization and the interaction between them on the concentration (2.0 gm/pot N with 1.5 gm/pot P) which total increased on height stem and leave number and stem diameter 13.44 cm and 11.61 leave and 2.98 cm in the end of study. While leaves area of plant and percent of chlorophyll and Nitrogen and Phosphor 2577.88 cm2 and 60% and 5.37% and 0.77% respectively in the end of study.