The experiment was conducted by selecting fine legume species such as Astragalus adsurgens and Onobrychis viciesolia with very good adaptability to sow them in sping and every other level strip land preparation on the basia of which semi-artificial grassland was established.The grassland grew so vigoriously that the vegetation cover 80%~85%

Astragalus adsurgens used to improve grassland has had an average per mu fresh forage production of 671.3 kg within 8 years

while Onobrychis viciesolia used to improve grassland has had an average per mud fresh forage production of 1035.4 kg

having an increase of 5.7 times and 9.4 times as hihe as those perior to the wasted slope improvement with an apparent controlling benefit obtained.This experiment study also prode into the controlling approachea and countermeasures of dry slops facing the sun in the loess hilly area.