الفهرس 
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Abstract
Two field experiments were conducted at El-Dakhla Oasis, New Valley Governorate, Egypt, during the two winter growing seasons of 2011/2012 and 2012/2013 to investigate the effect of date palm compost and nitrogen fertilization rates on the productivity of bread wheat under New Valley conditions. The randomized complete block design using split-plot with three replications was employed, where the three date palm compost rates (0, 5 m3/fed. and 10 m3/fed.) were allocated in the main plots and three nitrogen fertilization rates (50, 70 and 90 kg N/fed.) were assigned to the sub-plot. The grains wheat of Sids-12 cultivar was sown on Nov. 26th and Nov. 24th in the 1st and the 2nd seasons, respectively. The plot area was 10.5 m2 (3m width X 3.5m length).
The results could be summarized as the following:
I- Growth, yield attributes and yield traits:
1- Plant height (cm):
- Application the date palm compost by 5 m3/fed. gave the tallest plants (98.3 and 97.83 cm) in the 1st and the 2nd seasons, respectively.
- The tallest plants (98.10 and 98.07 cm) were recorded by the treatments received 70 kg N/fed. in the 1st and the 2nd seasons, respectively.
- The tallest plants (100.20 and 99.30 cm) and (98.50 and 97.80 cm) were obtained by the treatments had 5 m3/fed., and 10 m3/fed. compost with 70 kg N/fed., rate interactions in the 1st and the 2nd seasons, respectively.
2- Spike length (cm):
- Increasing compost fertilizer rate increased spike length. The increase in spikes length were 2.39% and 4.84% in the 1st season, while in the 2nd season were 3.35 and 12.67%, when the plants received 5 m3/fed., and 10 m3/fed. compost over zero compost, respectively.
- Increasing nitrogen fertilization rate increased significantly spike length and the tallest spikes (16.00 and 15.08 cm) were recorded by plants had the highest nitrogen rate (90 kg N/fed.) in the 1st and the 2nd seasons, respectively.
- The tallest spikes (17.21 and 16.05 cm) followed by (15.55 and 15.25 cm) were recorded by 10 m3/fed. compost with 90 kg N/fed. rate treatments interaction followed by 5 m3/fed. compost with 70 kg N/fed. rate treatments interaction in the 1st and the 2nd seasons, respectively.
3- Spikelets number/spike:
- Increasing compost fertilizer rate increased significantly spikelets number/spike and the highest values (19.43 and 17.00) were obtained at the highest compost rate (10 m3/fed.) in both seasons.
- The increase in spikelets number/spike (2.77 and 4.54%) in the 1st season, while this increase (2.09 and 5.51%) in the 2nd season were recorded by using 70 and 90 kg N/fed. over the plants received 50 kg N/fed. respectively.
- The maximum number of spikelets/spike (20.10 and 17.60) followed by (19.20 and 16.80) were realized with 10 m3/fed. compost with either 90 or 70 kg N/ed. treatments interaction in the 1st and the 2nd seasons, respectively.
4 - Spikes number/m2:
- The highest values of spikes number/m2 (484.1 or 500.7) were achieved by adding 10 m3/fed. or 5 m3/fed. compost in the 1st and the 2nd seasons, respectively.
- Increasing nitrogen application increased the spikes number/m2 and the maximum values (489.0 and 497.0) were found by applying 70 kg N/fed. rate in the 1st and the 2nd seasons, respectively.
- The maximum values of spikes number/m2 (526.0) in the 1st season and (530.0) in the 2nd season were recorded by 10 m3/fed. compost with 90 kg N/fed. rate and by 5 m3/fed. compost with 70 kg N/fed. rate treatments interaction.
5- 1000-grains weight (g):
- Adding date palm compost increased 1000-grains weight. These increases were (4.54 and 9.96%) in the 1st season, while in the 2nd season were (3.23 and 4.31%) by using 5 m3/fed. and 10 m3/fed. compost over the untreated plants with compost, respectively.
- Increasing nitrogen application increased significantly the 1000-grains weight and the heaviest 1000-grains (45.57 and 45.97 g) were achieved by the plants had 90 kg N/fed. rate in the 1st and the 2nd seasons, respectively.
- The heaviest 1000-grains (46.20 and 47.27 g) were recorded by the plants received either 10 m3/fed. or 5 m3/fed. compost with 90 kg N/fed. rate treatments interaction in the 1st and the 2nd seasons, respectively.
6- Straw yield (ton/fed.):
- The maximum values of straw yields/fed. (3.46 and 3.92 ton) were obtained by adding 5 m3/fed. compost in the 1st and the 2nd seasons, respectively.
- The increase in straw yields/fed. (14.77 and 9.06%) in the 1st season, while in the 2nd seasons (12.83 and 10.29%) were realized by the plants received 70 and 90 kg N/fed. rates over the plants received 50 kg N/fed. rate, respectively.
- The maximum values of straw yields/fed. (3.62 and 4.08 ton) followed by (3.54 and 4.06 ton) were obtained by the plants had 5 m3/fed. compost with 70 and 90 kg N/fed. rates treatments interaction in the 1st and the 2nd seasons, respectively.
7- Grain yield (ard./fed.):
- The maximum values of grains yields/fed. (18.80 and 19.10 ard.) were recorded by applying 5 m3/fed. compost rate in the 1st and the 2nd seasons, respectively.
- Increasing the nitrogen fertilization rate increased the grain yields/fed. These increases were 5.03% and 2.49% in the 1st season, while in the 2nd season were 8.07% and 5.06% when the nitrogen applied at 70 and 90 kg N/fed. rate over those received 50 kg N/fed. rate, respectively.
- The maximum values of the grain yields/fed. (19.04 and 19.50 ard.) followed by (19.01 and 19.20 ard.) were recorded by the plants had 5 m3/fed. compost with 90 kg N/fed. rate interactions followed by the plant had 10 m3/fed. compost with 70 kg N/fed. rate treatments interaction in the 1st and the 2nd seasons, respectively.
8- Biological yield (ton/fed.)
- The maximum values of the biological yields/fed. (6.26 and 6.59 ton) were obtained by adding 10 m3/fed. compost in the 1st and the 2nd seasons, respectively.
- The maximum values of the biological yields/fed. (6.11 and 6.68 ton) were recorded by the application of 70 kg N/fed. rate in the 1st and the 2nd seasons, respectively.
- The maximum values of biological yields/fed. were 6.38 ton and 6.35 ton in the 1st season, while in the second season were 6.97 ton and 6.63 ton when the plants received 70 and 90 kg N/fed. rates with 10 m3/fed. compost treatments interaction, respectively.
II- Quality traits:
1- Crude protein (%) in grains:
- Application the date palm compost increased significantly grain protein content and the highest values (15.76 and 15.35%) were obtained by adding 10 m3/fed. compost in the 1st and the 2nd seasons, respectively.
- The highest values of crude protein content in grains were 13.98 and 14.05% by the plants received the highest nitrogen rate (90 kg N/fed.) over the plants received the lowest nitrogen rate (50 kg N/fed.) in the 1st and the 2nd seasons, respectively.
- The highest values of crude protein content in grains (16.48 and 16.12%) followed by (15.85 and 15.47%) were recorded by adding 10 m3/fed. compost with the plants received 90 and 70 kg N/fed. rates treatments interaction in the 1st and the 2nd seasons, respectively.