Abrouguiet Al


Abrougui et al

Journal of  Agricultural Sciences

Vol. 4 (2), pp.
March 2014.

 ISSN: 2276-7770 



Manuscript Number: 020314087

DOI: http://dx.doi.org/10.15580/GJAS.2014.2.020314087 

Soil Bulk Density and Potato Tuber Yield as Influenced
by Tillage Systems and Working Depths


Abrougui K.1*, Chehaibi S.2,
Boukhalfa H.H.3, Chenini I.4, Douh
B.5 and Nemri M.6


Institute of Agronomy, University of Sousse. Department
of Horticultural Systems Engineering, Chott Meriem,

University Mohamed
Khider- Biskra. Department of agronomy. Biskra, Algeria.

Higher School of Rural
Equipments Engineering. Department of Mechanical
Engineering, Medjez El Beb, Tunisia.

Gembloux Agro-Bio Tech,
University of Liège. Department of Chemistry and
Bio-industries. Gembloux, Belgium.



@ yahoo. fr

@ gmail. com

@ yahoo. fr

@ yahoo. fr

@ doct. ulg. ac. be


*Corresponding Author’s Email:

khaoula_abr @ yahoo. fr
Phone: (+216) 73 327 540,

(+216) 73 327 591


evaluate the effects of tillage systems on soil bulk
density, yield and quality of potato crop (Solanum tuberosum
L.), three different tillage techniques were studied:
reduced tillage using discs harrow (RT), medium tillage
depth using discs plow (MT) and conventional deep tillage
using moldboard plowing (CT) with three working depths of
10, 20 and 30 cm respectively. Tillage was followed by a
first resumption after 10 days and a second one after 20
days. Soil structure was characterized by its bulk density
and potato quality by tubers size and yield. Samples were
collected from tilled plots at different dates spaced of 20
days. The obtained data were tabulated and analysed using
IBM SPSS 17.0 version and Tukey test. Compared to MT and RT,
CT decreased bulk density to 1.16 g cm-3 against 1.23 and
1.4 g cm-3 60 days after tillage respectively for the two
previous tillage systems and increased tubers size and
consequently the potato yield to an average of 11 Mg ha-1
compared to 9 and 7 Mg ha-1 respectively for MT and RT. The
statistical analyses of the data showed significant effects
of the treatments and the measurement date on soil bulk
Keywords: Tillage systems, soil structure, bulk
density, tubers size, potato yield.


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