24
MAR
2015

Crop relationship “yield – evapotranspiration” for green bean

R. Kalaydzhieva, D. Davidov, A. Matev*, V. Kuneva Department of Melioration and Geodesy, Faculty of Viticulture and Horticulture, Agricultural University, 12 Mendeleev, 4000 Plovdiv, Bulgaria Abstract. The aim of the study is to establish the parameters of the relationship “Yiel
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18
DEC
2014

Stress tolerance to drought of inbred maize lines

P. Vulchinkova* Maize Research Institute, 5835 Kneja, Bulgaria Abstract. During two-year field trials (2012 –2013) 11 inbred maize lines were studied on two contrasting conditions: under irrigation and without irrigation (water stress simulation). Screening was carried out of the tole
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14
MAY
2014

Parameters of “yield-irrigation depth” relationship for sunflower grown in the region of Plovdiv

A. Matev, R. Petrova Abstract. The aim of this work is to establish parameters of relationship “yield-irrigation depth” for sunflower (grown in the region of Plovdiv), using different equations, as follows: y = ax2 + bx + c; y = y + 2 (1–y ) x – (1–y )x2; Y = 1 – (1 –Y )(1 – x)n. The
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14
MAY
2014

Productivity of green beans, irrigated at different pre-irrigation soil moisture

R. Petrova, A. Matev, K. Koumanov, B. Harizanova-Petrova Abstract. The aim of the study was to establish productivity of green bean, variety “Strike” irrigated at different pre-irrigation soil moisture. The field experiment was conducted during the period 2010 – 2012 on th
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14
MAY
2014

Evapotranspiration of corngrop for silage

R. Bazitov, A. Stoyanova Abstract. During the period of 2009–2012 in the experimental field of the Agricultural Institute, Stara Zagora on soil type meadow cinnamon soil was conducted experiment with silage corn first crop. Corn was grown after predecessor wheat – pea mixture. F
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14
MAY
2014

Productivity of irrigation cotton cultivated under different inter-row spaces

I. Saldzhiev, A. Muhova Abstract. Field trial on cotton (Vega cultivar) was carried out during 2007–2011 on leached vertisols under irrigation regime of sprinkling – 75 % of the field moisture capacity (FMC) for the soil layer of 0 – 40 cm. The trial included the following variants: f
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14
MAY
2014

Productivity of sunflower grown in a periodic water deficit conditions

R. Petrova, A. Matev, H. Kirchev, A. Sevov Abstract. The aim of the conducted experiment is to determine the effect of irrigation canceling during the different phases of sunflower vegetation, and single irrigation done at a particular growth stage. The field experiment was conducted
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14
MAY
2014

Evapotranspiration of sunflower crops depending on irrigation

A. Matev, R. Petrova, H. Kirchev Abstract. The aim of the study is to analyze the influence of irrigation regime on evapotranspiration (ET) of sunflower, in terms of total and average daily values, its effectiveness in terms of yield, and the peculiarities of its formation. The field
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13
MAY
2014

Studying the effect of irrigation furrows in maize grain

A. Stoyanova, M. Georgiev, L. Plescuta Abstract. Experience was conducted during 2004-2006 in southern Bulgaria, the soil type Vertisol. Has studied the performance of maize grain in a water deficit. A shortage of moisture created by a spatial deficit. Irrigation is supplied in one or
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