مطالعه روش هاي مختلف خاك ورزي به همراه زيرشكني بر رشد و عملكرد ذرت علوفه اي (Single cross 704) در منطقه ورامين

The study of different methods of conventional tillage with subsoiling on growth and yield of forage corn (single cross 704) in varamin area

The Compressing of soil due to traffic of agricultural machines and tillage tools which affect on the soil physical features and performance of agriculture production is going to become worst by mechanization of agriculture and vast application of tools. In this research, as a split plot experiment based on a completely randomized blok desing has been used and the effect of three types of tillage (moldboard plow-without moldboard plow and chisel plow)on two levels with and without subsoiling on selected plant and soil parameters was studied. Soil parameters under study included. T -moisture content 2-Bulk density of soil ,before and two months after planting in two depth of (0-10cm) and (10-20cm)and plant parameters included: 1-The percentage of germination 2-plant dry matter, analysis of variance and Duncans multiple range test for comparision of means has been used. It was determined that in plots with subsoiler, the treatment of bz(subsoiler + moldboard plow)had a significant difference with az(subsoiler + chisel) and cz(subsoiler + without moldboard).On the other hand in plots without subsoiler a chisel showed a significant difference with b(moldboard plow) and c(without moldboard plow)