In order to improve the efficiency of land use and achieve the high yield and benefit of alfalfa in the arid area of northern Weihe River basin

the growth status of alfalfa both on shady(east)slope and sunny(west)slope was investigated and simple correlation analysis

partial correlation analysis

and path analysis were made for selected three characters of alfalfa.Results show that in the same slope aspect but different slope positions

alfalfa yield and the growth conditions of physiological characteristics on lower slope are superior to those on uphill.In the same slope position but different aspect

the growth status of alfalfa on the shady slop is better.The best growth condition is on lower shady slope and the worst

on upper sunny slope.Effect of slope aspect on alfalfa yield is greater than slope position.The simple correlation coefficients on plant height

branch number

and single-stem weight are very significant

but the path coefficient and decision-making factors vary greatly.Plant height and branch number play a direct role in yield.The direct effect of single-stem on biomass is not significant

whereas plant height and branch number play an indirect role in biomass.