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).
The present investigation was undertaken to estimate phenotypic
correlation and path coefficient analysis for grain yield and its components in
maize. Four local genotypes of yellow maize were evaluated in 2008 and 2009
growing seasons at two loca
tions i.e. Damascus and Dir Al-Zor under three
nitrogen fertilization levels (130, 195 and 260 of N. ha-1), The nitrogen fertilizer
was applied at two splits. Split split plot design was used with 4 replications.
Results of phenotypic correlation values showed that grain yield at Damascus
location was positively and significantly associated with ear height (r= 0.204**),
ear length (r= 0.205**) and number of rows per ear (r= 0.228**). On the other
hand, grain yield at Dir Al-Zor location was positively and significantly
associated with all studied traits at combined data whereas, it was positively
and significantly associated with ear length at three levels and combined data
(0.305*, 0.410**, 0.347** and 0.375**, respectively). The data of path coefficient
analysis showed that ear length, ear height and number of rows per ear had
positive direct effects on grain yield variation and thus grain yield
improvement can be achieved through selection for ear length and ear height at
Damascus location (11.06%). On the other side, data showed that each of ear
height, number of kernels per row and 100-kernel weight had positive direct
effects on grain yield variation (32.98%) and thus, 100-kernel weight can be
considered as selection criteria may lead to the improvement of grain yield in
yellow maize at Dir Al-Zor location.
The present investigation was undertaken to estimate phenotypic
correlation and path coefficient analysis for grain yield and its components in
maize. Four local genotypes of yellow maize were evaluated in 2008 and 2009
growing seasons at two loca
tions i.e. Damascus and Dir Al-Zor under three
nitrogen fertilization levels (130, 195 and 260 of N. ha-1), The nitrogen fertilizer
was applied at two splits. Split split plot design was used with 4 replications.
Results of phenotypic correlation values showed that grain yield at Damascus
location was positively and significantly associated with ear height (r= 0.204**),
ear length (r= 0.205**) and number of rows per ear (r= 0.228**). On the other
hand, grain yield at Dir Al-Zor location was positively and significantly
associated with all studied traits at combined data whereas, it was positively
and significantly associated with ear length at three levels and combined data
(0.305*, 0.410**, 0.347** and 0.375**, respectively). The data of path coefficient
analysis showed that ear length, ear height and number of rows per ear had
positive direct effects on grain yield variation and thus grain yield
improvement can be achieved through selection for ear length and ear height at
Damascus location (11.06%). On the other side, data showed that each of ear
height, number of kernels per row and 100-kernel weight had positive direct
effects on grain yield variation (32.98%) and thus, 100-kernel weight can be
considered as selection criteria may lead to the improvement of grain yield in
yellow maize at Dir Al-Zor location.
The present investigation was undertaken to estimate phenotypic
correlation and path coefficient analysis for grain yield and its components in
maize. Four local genotypes of yellow maize were evaluated in 2008 and 2009
growing seasons at two locations i.e.
The experiment was carried out in Tartous Governorate in the Qubeiba region in the two agricultural seasons 2011 and 2012 to study the effect of different types of ploughs, the depth of plowing, and the timing of adding nitrogen fertilizer on some ph
ysical and chemical properties of the soil and some growth indicators of peanuts and its productivity. Three types of plows were used: MP ), disc plow ( DP ) and backhoe plow ( CP ) .
نفذت هذه الدراسة في ثلاثة مواقع بيئية مختلفة على مدى ثلاث سنوات متتالية على عدد من هجن
الذرة الصفراء المستنبطة محليًا، بالتعاون بين كلية الزراعة بجامعة دمشق و دائرة بحوث الذرة في
مديرية البحوث العلمية الزراعية بوزارة الزراعة و الإصلاح الزراعي. اتبع
تصميم القطع تحت المنشقة
لتحليل التباين لصفتي الإنتاجية و نسبة الرطوبة في الحبوب من ثلاثة مكررات استخدم برنامج MSTAT
لمقارنة المتوسطات و لتحديد درجة المعنوية لكل من عامل الصنف، السماد الآزوتي و اختبار Dencan
و الكثافة النباتية إضافة إلى الأفعال المتبادلة بين هذه العوامل و بينها و بين المواقع و السنوات.