POST-EFFECT IN SPRING CROPS AFTER USING DIFFERENT TYPES AND MACHINES FOR SOIL TILLAGE, SOWING AND HARVESTING IN A LONG-TERM FIELD TRIAL | ПОСЛЕДЕЙСТВИЕ ПРИ ПРОЛЕТНИ КУЛТУРИ СЛЕД ПРИЛАГАНЕ НА РАЗЛИЧНИ НАЧИНИ И МАШИНИ ЗА ПОЧВООБРАБОТКА, СЕИТБА И ПРИБИРАНЕ В ТРАЕН ПОЛСКИ ОПИТ
2010
Georgiev,D., Dobroudja Agricultural Institute, General Toshevo (Bulgaria) | Iliev, I., Dobroudja Agricultural Institute, General Toshevo (Bulgaria)
During 2003 – 2009, in a 6-field crop rotation carried out at Dobrudzha Agricultural Institute, the effect of the type and machines for soil tillage and sowing of wheat and the ways of post-harvest residue treatment in all crops on the productivity of sunflower, maize and bean was studied. In relation to the aim of the study, two types of machines were investigated: 1.conventional and 2.combined machines Amazone providing high quality of soil preparation for sowing and of sowing itself. The trial was carried out on 300 da of slightly leached chernozem soil. The mineral fertilization of all crops was in accordance with the type of previous crop and its fertilization. Post-harvest residues from the previous crop were treated in three different ways: 1 removal from the field РО1, 2 chopping and plowing РО2 and 3 burning РО3. The effect of the type and machines for soil tillage, sowing and harvesting of wheat as a previous crop on the yield from the spring crops varied. Highest yield from all spring crops was obtained after soil tillage and sowing of wheat, as predecessor, using combined machines Amazone. At most of the years of the study highest yield from sunflower and maize was obtained in the variant including simultaneous harvesting of grain and chopping, spreading of the plant residues and plowing later. The higher yield from field bean was produced in the variants with separate harvesting of grain and of plant residues or burning them.
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