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    THE EFFECTS DIFFERENT TILLAGE TREATMENTS ON SOIL SURFACE CONDITIONS AND DUST CONCENTRATION IN SEMI-ARID CENTRAL ANATOLIA
    (PARLAR SCIENTIFIC PUBLICATIONS (P S P), 2017) Seflek, Ali Yavuz; Marakoglu, Tamer; Carman, Kazim
    The traditional method of agriculture is generally harmful to the environment as it involves procedures such as burning wastes and deep soil tillage for weed control. Tillage results in the release of particulate matter (PM) from soil. Improper soil tillage methods and techniques can increase soil erosion, and ultimately cause degradation of soil. In this study, we measured dust concentration (PM10) generated by alternative soil tillage implementations and examined its relationships with mean weighted diameter, stability index, and surface roughness. Considering alternative soil tillage treatments, mean weighted diameter, shearing stress, stability index, and surface roughness values were found to be in the range of 5.25-11.57 mm, 0.34-0.618 N cm(-2), 2.24-3.80, and 8.2%-29.0%, respectively. Dust concentration generated by different soil tillage treatments were determined to be between 49.19 and 143.45 mg m(-3). The effects of tillage treatments on dust concentration were found to be significant (P < 0.01). A 22.6% increase in soil moisture resulted in 40.8% decrease in dust concentration. The correlation coefficients indicating the relationships of dust concentration with mean weighted diameter, shearing stress, and stability index were calculated as 0.94, 0.81, and 0.94, respectively.
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    PERFORMANCE OF PNEUMATIC PRECISION SEED DRILL IN BLACK CARROT SOWING
    (UNIV AGRICULTURE, FAC VETERINARY SCIENCE, 2018) Ornek, Mustafa Nevzat; Seflek, Ali Yavuz; Haciseferogullari, Haydar
    In this study, non-pelleted black carrot seeds were planted over the ridges under field conditions. Planting was performed over three narrow spacing rows with a vacuum-type pneumatic single-seed planter. Planter forward speeds were arranged as 0.42, 0.84 and 1.25 m s(-1) and on-row seed spacing was arranged as 2.34, 4.65 and 6.87 cm. Experimental plots were observed during the initial month after planting. Mean germination times, germination rate index, field emergences, on-row plant distribution patterns and number of plants per unit area were evaluated. Variation coefficients indicating the on-row plant regularity were between 62.86 and 86.42%, mean germination rates between 15.98 and 23.07 days, germination rate index values between 0.321 and 1.502 per meter, field emergence rates between 34.26 and 69.70% and number of plants between 37.66 and 70.66 plant m(-2).