A field experiment was conducted for two years 2011-2012 to evaluate the effect of various tillage implements, tillage depths and nitrogen fertilizer timing application on soil bulk density, its moisture, and peanut growth. Three different implements
were used: moldboard (MP), chisel (CP) and disk ploughs (DP). Tillage depth treatments (split-plots) included (8-10) cm, (18- 20) cm and (28- 30) cm tillage depths; D1, D2 ,D3 respectively. Timing applications (split-split- plots) were: T1 all nitrogen fertilizer applied at planting ,T2 half nitrogen applied at planting and half at flowering ,T3 all nitrogen fertilizer applied at flowering.
All tillage implements decreased soil bulk density for the tillage depth. They were for treatments (DP,CP,MP) at (0-10)cm depth (1.31,1.33,1.29) g/cm3, (1.31,1.32,1.31) g/cm3 at (10-20) cm depth and (1.36,1.37,1.35)g/cm3at(20-30) cm depth. Soil moisture increased in treatments (DP,CP) with increasing tillage depth .There was no effect of previous factors on main branches, but timing of nitrogen fertilizers (T1, T2) effected secondary branches significantly compared to T3. Moldboard significantly increased leaf area to (1.77) m2/plant compared to chisel (CP) and disk ploughs (DP). Also D2, D3 increased leaf area compared to D1. (T1, T2) significantly increased leaf area compared to T1. Interaction between timing of application and depth (D3 xT2) gave significant differences. The best value was (1.85) m2/plant for the two years.
A field experiment was conducted in Agriculture collage –Tishreen University for two years 2011&2012 to evaluate the effect of tillage depths and nitrogen fertilizer timing application on growth productivity indicators and seeds' chemical compositi
on of peanut plant. The experiment was designed in split plots with three replicates. The main plots included shallow tillage (8-10) cm, medium tillage (18- 20) cm and deep tillage (28- 30) cm tillage depths D1, D2, D3 respectively. Timing application (split- plots) were: T1 all nitrogen fertilizer applied at planting ,T2 half nitrogen applied at planting and half at flowering ,T3 all nitrogen fertilizer applied at flowering .Deep tillage caused significant differences and increased leaf area index to (11.93,11.80) for the two seasons respectively . For dry weight/plant were (285.9, 266.6) g for two seasons respectively and seeds index arrived highest values (74.32, 74.53) g for two seasons respectively. Tillage depth increased protein and oil percentage in seeds, but the effect was insignificant. Timing of nitrogen fertilizer had significant effect on leaf area index. The best values were (11.80, 11.60) for two seasons respectively in the treatment T2, and dry weight/plant (283.0, 263.4) g/plant respectively. Significant effect was observed for seeds index. The highest values were (74.41, 74.21) g for two seasons respectively in the treatment T2, so that for protein percentage in seeds arrived highest values (24.35, 25.24) % respectively in the treatment T2. But the highest values of oil percentage were (47.10, 47.21) % for two seasons respectively in the treatmentT3. Interaction (D x T) had significant effect on leaf area index. The best values were (12.53, 12.07) for two season respectively at (D3 x T2) interaction treatments. This interaction had no significant effects on the rest of the indicators
This search was conducted in Albassa town at Lattakia governorate , during 2011
and 2012 growing seasons for study effects of 3 sowing dates ( 15th of April , 25th of April
and 5th of May ) and 4 levels of nitrogen fertilization ( N1: control , N2:
50 kg/ha , N3: 100
kg/ha , N4: 150 kg/ha ) on several attributes of groundnut (Coastal category) production .
The results showed that the 5th of May sowing date had significant excel in the
average of the two growing seasons in dry weight of pods in plant , wheight 100- Seeds,
The per-hectare yield of seeds and Harvest index , It ranked first in the two seasons search.
Also, The application of nitrogen fertilizer at a rate of 150 kg/ha had resulted in a
significant increase in studied productivity traits in the average of the two growing
seasons , Except for harvest index , which was at least as compared to other levels of
fertilization.
The interaction between the sowing date ( 5th of May ) and the level of nitrogen
fertilization (150 kg/ha) showed a significant excel in the average of the two growing
seasons in dry weight of pods in plant , wheight 100- Seeds and The per-hectare yield of
seeds .
This research aimed to evaluate the general and specific combining ability
components for six inbred lines and 15 hybrids produced by a half diallel cross method,
and was conducted during 2010-2011 seasons, in the Department of the Maize Researches
at G.C.S.A.R. Damascus .
The evaluation included the grain yield, ear height, ear length, and silking under two
different treatments of nitrogen fertilizer (1- addition of 50% of N-fertilizer with sowing
and the other 50% one month after sowing. 2- addition of 50% of N-fertilizer 18 days after
sowing and 50% one month after sowing).and 3 replicates.
Results indicated that:
Mean squares of inbred lines, and hybrids were highly significant for all studied
traits under two adding dates of nitrogen fertilizer, which indicated the presence of genetic
distance among parental lines.
The ratios (
2
GCA/
2
SCA) showed that additive gene effect was more important than
non-additive gene effect in controlling all studied traits except grain yield which showed
dominance of non-additive gene effect under tow dates.
Many of significant positive GCA effects were obtained for all traits, therefore, it
could be concluded, that the inbred lines CML.330, IL.26-09 and CML.334 seemed to be
the best general combiners for grain yield.
The hybrid (CML.368 × IL.215-09) had showed the best specific combining ability
effects for grain yield under the first date, while the hybrid (CML.330 × IL.26-09) showed
the best SCA effects under the second date.
The second adding date of nitrogen fertilizer (50% 18 days after sowing and 50%
one month after sowing) had surpassed of the first date (50% with sowing and 50% one
month after) with significant effects for grain yield trait.
The research was executed within the season 2016, in the west of
HOMS in the first settlement area.
The study has showed the effect of plant density and nitrogen
fertilization was studied on the growth and productivity of soybeans
Glycine max L . (Sb44).
