Studying The Effect of Planting Method , Kind of Fertilizer on The Yield of Marjoram ( Majorana hortensis Moench. ) and Thyme ( Thymus vulgaris L. ) Plants

This research is conducted in a private field at Abu – Gharak , Babylon Province , during two seasons ( 2009 & 2010 ), to study the effect of two planting methods and kind of fertilizer on the yield , essential oil quantity in Marjoram and Thyme plants . Two field experiments are conduct by using randomized complete block design (RCBD) with three factors in are replicates , factor (A) represent planting method , (B) Nitrogen fertilizer , and (C) Iron fertilizer . The experimental units represented by (one plot & four furrows ) . The Volatile oil extracted from theleaves and the flowers tops by hydro distillation method using Clevenger apparatus , the volatile oil samples from the two plants were analyzed by (GLC). The results obtain indicated that , there are significant effect for the fertilization with Nitrogen and Iron on the growth , volatile oil quantity and percentage of some oil components of Marjoram plants during the two seasons . Also foliar application with Nitrogen & Iron elements produced high quantities of dry matter and volatile oil in Marjoram plants that grown in furrows during the two seasons , in addition , that foliar application with nitrogen raised Sabenene & Terpenene percentages in the Marjoram oil . The results during (2009 ) show that foliar application of nitrogen on Thyme plants grown in plots with soil application with Iron produced high quantity of dry matter and high volatile oil content comparing with the control . In (2010) the results indicate that foliar application with nitrogen and iron to Thyme plants that planted on furrows significantly affected the dry matter . In addition , that high quantity of volatile oil produced in thymus plants due to the foliar application with nitrogen and iron , also this application raised the two aromatic compounds ( Thymol & Carvacrol ) percentages in Thyme oi