Correlation and regression relations between the height of plant and ear with some yield characters in maize

This study was conducted at the farm of the Faculty of Agriculture in Kharabo during 2011 2012 growing season. RCB design with two replicates was used and the correlation and regression relationship among characters were tested. Results showed that plant and ear heights were both positively correlated with some quantitative characters (number of kernels per row، number of rows per ear, 100 kernel Wight, and kernels weight per ear). Regression results also showed that the increase in plant and ear height was associated with an increase in number of rows per ear, kernels weight per ear and 100 kernel wight. It was concluded that plant height and/or ear height can be used as a direct selection index for number of rows per ear, kernels weight per ear and 100 kernel wight.

Econometrics analysis of cost function of sheep, goats, and cows in midregion of Jordan

This research aimed to determine the economic scales of production and different product values, and the difference between the true sizes and its parallel economic areas in the midregion of Jordan. The econometrics analysis was used for the cost functions of sheep, goats, and cows production in midregion of Jordan. The data were analyzed by linear regression using suitable economic models. Total production functions of sheep were determined, and the average productivity was derived to determine the economic scales in order to minimize the average productivity cost of sheep, goats and cows. For the sheep, the product value was about JD 16649.59 for 419 sheep, with average cost of one JD is 0.522 JD. Marginal cost function was derived from the total production cost function, with the equality marginal cost function to parallel price in order to reach the scale of maximize profit. The production value was 18251.49 JD for 460 sheep and average JD cost of 0.56. The present productivity scale was 157sheep which was 262 sheep lower than the productivity scales for economic efficiency and 303 sheep lower than that for maximize profit.

Forms of Manganese and their Association with Soil Properties in Soils of Homs Governorate

This study was undertaken to evaluate the chemical speciation and distribution of Mn in soils of Homs Governorate. Sequential extraction scheme was used to fractionate Mn into exchangeable, bound to carbonate, bound to manganese (Mn) and iron (Fe) oxide, organically bound, and residual forms.