تقييم تأثير آلة مركبة في نمو نبات الحنطة و بعض خصائص التربة الفيزيائية

الملخص EN

The experiment was carried out in Dhi Qar Governorate, Shatrah District, in one of the fields affiliated to the Shatrah Technical Institute for the winter agricultural season for the cultivation of wheat crop for the year 2021-2022.

The experiment used an Antar type agricultural tractor (71) in the year of manufacture 1991 with a three-wheeled vehicle (a three-body tilting plow and a working width).

1.5 m, and a rotational softener with working width 1 m that takes its movement from the rear drive shaft of the tug with a sprinkler used to spray pesticides or liquid fertilizers), and the power source has an internal combustion engine, in order to study the effect of the compound machine on the growth and yield of wheat.

The experiment included two factors: the forward speed of the machine unit, which was adopted as the first main factor with three operational speeds 2.541 and 3.433 and 4.091 kmh-1.

As for the depth of treatment, it was at three levels 14, 16, 18 cm as the secondary factor, and the studied traits included performance indicators, physical soil characteristics, and growth traits of the crop (loss capacity by slipping, bulk density, plant height).

The experiment was carried out according to a Completely Random Design (CRD) and with three replications, and the statistical program Genstat was used to analyze the data, and the significant differences between the means were compared with the least significant difference test 0.05.1- The results showed the superiority of treatment 14 cm compared to other treatments, as it gave the best readings for the studied traits as indicators of mechanical performance (slippage), physical characteristics (bulk density) and plant-specific traits (height) compared to treatments 16 and 18 cm.2- The practical speed coefficient gave 4.09 kmh-1had the highest slip value, which was 3.931 % compared to the speeds of the transactions 2.54 and 3.43 kmh-1.3- The practical speed treatment exceeded 2.54 km.

by giving the best readings compared to other speed coefficients of 3.433 and 4.09 kmh-1 and for all studied traits {such as mechanical performance indicators (slippage), physical characteristics and plant-specific characteristics.