IRAQ JOURNAL OF AGRICULTURAL RESEARCH

A field trial was conducted during spring and fall seasons at 2005 at fields of Field Crops Dept., Agriculture Coll., Univ., of Baghdad by using seeds of two sorghum cv. (Inqath and Rabeh) produced from different sowing dates at 15th of each of June, July and August at faal season of 2004. Then its graded into three sizes (3.1-3.5, 3.6-4.0, and 4.0 mm) by using sieves have circularity holes. Split-split plot design was made, so that treatments in this trial in both seasons where: seeds of Inqath and Rabeh cv. (main plots), produced seeds from sowing dates (secondary plots) and seeds sizes (sub secondary plots) with four replications during spring and with three replications during fall seasons of 2005. The objectives of this study were to find out the effect of seed size produced from different sowing dates of both cultivars on grains yield, yield components, and protein percentage. Simple correlation was calculated between some characteristics. \"Inqath\" cv. seeds were significantly superior in grains yield and protein percentage in spring season (7.52 ton.ha¹ and 13.9%) respectively, while in fall season it was significantly superior in seed weight (32.9 mg). Seeds produced from plants of sowing date on 15th July were significantly superior in seed weight in spring season (29.4 mg), in fall season they were significantly superior in seed weight, number of seeds per head and grains yield (32.7 mg, 2211 and 10.22 ton.ha¹) respectively. The seeds of size 4.0 mm were significantly superior in seed weight and grains yield (33.1 mg, and 10.19 ton.ha¹) respectively in fall season. Grains yield had positive significant correlation with seed weight and number of seeds per head in both seasons and significant negative correlation with protein percentage in fall season only. Number of seeds per head it\'s the importance yield components which effect on grains yield comper with seed weight, because its higher correlation with grains yield.

A field experiment was conducted to study the effect of urea fertilizers (urea, local sulfur -coated urea and American sulfur -coated urea added at a rates of 80, 160, 240 and 360kg N/.ha), on yield and yield components of tomato (c.v Super Marmande) grown in a loamy sand soil. Drip irrigation with saline water was used at Bergesia Experimental Station, during 1997-1998 and 1998-1999 by using RCBD with 3 replications.
Results showed that American sulfur-coated urea levels of 160 and 240kg N/ha significantly increased all yield components and yield compared with the normal urea and local sulfur coated urea, for two seasons.
Application of 240 kg N/ha as American sulfur -coated urea gave the highest yield (41.767ton/ha), average number of fruits/plants(16.35), average of fruit weight (65.27g) and fruits diameter (6.59cm) for two seasons, respectively. No significant differences were observed between 160 and 240 kg N/ha American sulfur -coated urea treatments. The 160kg N/ha treatment considered the best treatment that gave significant superiority as compared with the control for the two seasons.

A pot experiment was conducted at the College of Agriculture, University of Basrah to study the effect of addition of different levels of molybdenum (0, 0.2 and 0.4) mg Mo/kg soil as Na₂MoO4.2H2O (40% Mo) by three application methods (soil application, or foliar spray, or seed treatment) on the efficiency of nitrogen fixation and growth of alfalfa plants.
The results showed that the addition of 0.4 mg Mo/kg soil caused in a significant increase in nodules number, C₂H₂ reduction, nitrogen uptake and dry weight by (12, 20, 20 and 15)%, respectively compared with no addition of Mo. Results also showed that application of 0.4 mg Mo /kg soil didn't significantly differ from the application of 0.2 mg Mo/kg soil in their effect on most of the studied parameters.
Application of Mo with seeds gave the highest values for most of the studied traits, followed by soil application.

M. T. Al-Kaisey***
ABSTRACT
Total phenolic compounds of pulp were determined in ten grape varieties (Vitis vinifera L.) including seven seeded varieties namely: Shadda Soudda, Rossi 7, Kamali, Buhrizi, Dase Al-Anz, Halawani and Rush Meo, and three seedless varieties: Rossi 5, Black Munokka and Thompson through out two seasons. Total phenolic content was effected by fruit color and higher value was found in Rush Meo (11011.26 and 16196.03) mg/kg, and the lower value was found in Halawani (1513.80 and 2193.66) mg/kg in two seasons, respectively. The pulp fruits of second season content higher phenolic compound.
The pulp of colored varieties posses high proanthocyanidin content.
The white colored pulp seedless varieties content higher amount of Catechin comer with colored varieties. Meanwhile, no relationship was found between pulp color and the existence of seeds and the Epicatechin content. Quercetin was found in higher content in white colored seed pulp mainly in Das Al-Anz. The Rutin and P-Coumaric acid and Ferulic acid were variable.

This study was carried out at Abu-Ghuraib Agricultural Research Station during the seasons of 2002 and 2004. The experiment included 6 treatments which were the combination of 2 methods of seedling production of tomato (nursery plots and styropore tays) and 3 ages of seedling which were at 4, 6, and 8 leaves stage to study their effects on survival percentage after transplanting, vegetative growth and yield of tomato. Randomized Complete Block Design by using three replication was used. The results revealed that survival percentage of transplants increased significantly when produced in trays which were 79.2, 82.3% compared with plots treatment which gave 70.9, 75.5% during the first and second seasons respectively. In addition to that an increase in the plant height, and number of leaves was were recorded. The yield of these plants was 6.41, 6.39 ton/Donum compared with 4.45, 4.47 ton/Donum for the plants produced by using plots seedlings. On the other hand, it was found that using the seedlings which had medium age with 6 leaves were the superior than the young or old seedlings and affected significantly both plant growth and the yield production which were 6.70, 6.41 ton/Donum compared with 4.3, 4.12 ton/Donum when using the young seedlings and 5.57, 5.76 ton/Donum for old seedlings.

The effect of different concentrations of supplementary vitamin C (0, 50, 100, 150, 200 and 250 mg Vit. C./Kg diet) on growth performance of grass carp Ctenopharyngodon idella (Val. 1844) was studied from 15th Nov./2003 till 15th April 2004. Experimental fish (m.wt.-31.0±2.0 gm) were distributed into 8 1 aerated glass aquaria and stocking at a rate of 5 fish per aquarium (each treatment with 2 replicates) randomly. Fish were weighed biweekly.
Fish fed 200 mg Vit. C/Kg diet exhibited a highest daily growth rate (3.35±0.43 gm), whereas maximum specific growth rate (6.64±0.03 gm %/day) and highest relative growth rate (153.79±0.86%) were conducted with fish fed 150 mg Vit. C/Kg diet. Results showed no significant differences between controlled treatment (100 mg Vit. C/Kg diet) and (150 mg Vit. C/Kg diet).