Scientific Papers Series A. Agronomy

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Figure 3. Spatial distribution of available phosphorus (mg P 2 O 5 /100g soil) content in soil in parcels 108 and 155 Content of available potassium Usually soils in Bulgaria are well stocked with potassium, but in this case studied areas are an exception. Average content of assimilable potassium, total for observed terrains is 13.79 mg K 2 O/100g soil, which is much below the standards for reserves of this nutrient. Obtained data require an application of stockpiling fertilization with potassium fertilizers. Stockpiling potassium fertilization will be differentiated by norms for some parts of the parcels. The obtained results for reserves of phosphorus and potassium in soil give a reason to develop differentiated rates of stockpiling fertilization with these nutrients, which from agrochemical and economic viewpoint is appropriate for studied areas. For this purpose is used the method of Nearest neighbor, combined with soil sampling in graticule. Figure 4. Spatial distribution of available phosphorus (mg P2O5/100g soil) content in soil in parcels 113, 157 and 158 Figure 5. Spatial distribution of available potassium content (mg K 2 O/100g soil) in soil in parcels 108 and 155 Figure 6. Spatial distribution of available potassium content (mg K 2 O/100g soil) in soil in parcels 113, 157 and 158 129
Statistical data processing For the extrapolation of the data for reserves of nutrients on the principle from point to two dimensional space of field surface is used the method of Nearest Neighbor. Previously is randomized in space the position of points for investigation and is set the density of graticule corresponding with the technological significance of obtained thereby sub-parcels. The randomized soil sampling formulated an algorithm in which areas have parallel sides. Sampling points are presented as threedimensional vectors, the two of dimensions are meter coordinates x and y, and evaluated factors (in this case, stocks of the soil of phosphorus and potassium) play the role of vector on the axis 0z in three-dimensional space. Theoretically it is possible both parameters-reserves of phosphorus and reserves of potassium to be unite in a common algorithm with the coordinates of points, but then can not be achieved clear visualization and respectively mapping of the results. In the accepted model the boundaries of representativeness of the sampling point forms a set of points with discrete distribution on axes 0x and 0y and with constant value on 0z. Extrapolation error is estimated by the method of fuzzy boundaries. The presence of fuzzy boundaries obtained during the mapping of the algorithm generally should be an indicator for thickening of graticule of samples on the terrain. In this case it is avoided because by definition we have adopted the smallest technological size of areas. Fertilization Depending on the content of available phosphorus and potassium in the soil and after statistical analysis of data by the method of Nearest neighbor is developed a model for differentiated fertilization of investigated area. Obtained on the first approximation results are generalized to the threshold of economically significant sensitivity to corresponding nutrient, and then are outlined sub-parcels for differentiated fertilization. For stockpiling phosphorus fertilization is used triple superphosphate and for potassium fertilization-potassium sulphate. The area of sub-parcels for phosphorus fertilization, the rate of fertilization and the required amount of triple superphosphate are shown in Figure 7, Figure 8, and Table 1. The area of sub-parcels for potassium fertilization, the rate of fertilization and the required amount of potassium sulphate are shown in Figure 9, Figure 10, and Table 2. Phosphorus and potassium fertilizers are applied separately, after cleaning the weeds from the terrain. In order to achieve better homogenization of phosphate fertilizers with soil, it is recommended calculated in Table 1 fertilizer rates to be divided in two and to be applied twice. After fertilization, the area is ploughed at 15 cm in order to achieve better mixing of fertilizer with the soil. First three years after establishment of vineyard phosphorus and potassium fertilizers are not applied. During vegetation of vine is recommended to perform three or four times foliar fertilization with appropriate fertilizers, containing micronutrients and amino acids. Spraying of fertilizers can be combined with the performance of vineyard crop protection. Table 1. Rate of fertilization (kg 2 5 /ha) and required amount triple superphosphate (t) Subparcel, subparcel (ha) phosphorus (kg 2 5 /ha) TSP (t/ha) TSP (t) Area of Rate of stockpiling fertilization with Rate of Required amount Parcel, 1 155 33.486 528.8 1.15 38.50 2 108 155 18.038 377.1 0.82 14.80 3 108 25.973 485.2 1050 27.30 4 157 158 13.688 548.0 1.19 16.30 5 157 158 27.913 477.8 1.04 29.00 6 113 158 20.237 521.1 1.13 22.90 7 158 6.741 485.6 1.05 7.10 Total: 146.075 155.90 130
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SCIENTIFIC PAPERS SERIES A. AGRONOM
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University of Agronomic Sciences an
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SUMMARY SOIL SCIENCES Variation of
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A survey study on determination of
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Effects of different nitrogen forms
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Determine the effect of some cultiv
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SOIL SCIENCES
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K + /Na + ratio that ultimately pre
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ZINC POLLUTION OF SOILS LOCATED INT
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as the result of the plant protecti
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OBTAINING OF HUMATE-BASED LIQUID FE
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an 11.6% mass loss and a 145.5 J/g
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mijloc important de fertilizare ech
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collected on 13/09/2012 at the dept
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Table 3. The Influence of mineral f
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CONCLUSIONS The Hybrid rapeseedseed
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Scientific Papers. Series A. Agrono
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CONCLUSIONS The results have shown
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organic carbon was determined thoug
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THE INFLUENCE OF SOIL TILLING SYSTE
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emerging plant, we recommend using
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at the cellular level of Ni (Bou et
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concentrations in agricultural soil
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Surfaces at the bottom shows higher
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substantial balance that means maxi
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Table 4. Aggregate composition and
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1. The initial parameters of ordina
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Table 8. Modification of the featur
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Abstract Scientific Papers. Series
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the linear correlation coefficient
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CONCLUSIONS For soil polluted with
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50 and 100 mg/kg and appreciated th
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Figure 4. Copper content in soil Fi
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samples collected in northern of fa
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MATERIALS AND METHODS Study areas T
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influenced by heavy metals contamin
Page 79 and 80: Pankhurst C.E., 1997. Biodeversity
Page 81 and 82: horizons, color, texture, structure
Page 83 and 84: From a chemical reaction these soil
Page 85 and 86: - Organic matter by Tiurin; - pH (H
Page 87 and 88: Abstract Scientific Papers. Series
Page 89 and 90: RESULTS AND DISCUSSIONS Invertebrat
Page 91 and 92: of moisture in arable layers, incre
Page 95 and 96: experimentation. The increase of mo
Page 97 and 98: THE TRANSITION PERIOD TO THE MARKET
Page 99 and 100: Activity data Activity data comes f
Page 101 and 102: Figure 2. The decrease of cultivate
Page 103 and 104: of nitrous oxide. In: Revised 1996
Page 105 and 106: Laboratory results have been interp
Page 107 and 108: The air-mass interferes with the ov
Page 109 and 110: Under these conditions, Moldavian r
Page 111 and 112: decreased to near wilting coefficie
Page 113 and 114: CONCLUSIONS Severe drought that aff
Page 115 and 116: (temperature and soil moisture, air
Page 117 and 118: primary cultures analyzed, hybrids
Page 119 and 120: weeding crops during the growing se
Page 121 and 122: improper drainage and irrigation (G
Page 123 and 124: Figure 4. Scores plot of the soil s
Page 125 and 126: Table 1. Cluster analysis of the st
Page 127 and 128: DIFFERENTIATION OF FERTILIZATION RA
Page 129: Figure 2. Situation and location of
Page 133 and 134: Phosphorus and potassium fertilizer
Page 135 and 136: 30 m. Regarding the formation and d
Page 137 and 138: considerably less. These facts are
Page 139 and 140: Table 2. Hydraulic dimensioning Par
Page 141 and 142: SPATIAL VARIATION OF PHYSICAL CLAY
Page 143 and 144: Figure 2. Situation and location of
Page 145 and 146: esistant to high clay content in th
Page 147 and 148: CONCLUSIONS Described regularities
Page 149 and 150: ecome widespread and in order to ea
Page 151 and 152: Table 3. Results of the analysis of
Page 153 and 154: COMPARISON OF SYSTEMS FOR TAXONOMY
Page 155 and 156: RESULTS AND DISCUSSIONS Soil types
Page 157 and 158: underdeveloped cinnamon forest soil
Page 159 and 160: Figure 8. Content of skeletal fract
Page 161 and 162: MODEL FOR INVESTIGATION, AMELIORATI
Page 163 and 164: RESULTS AND DISCUSSIONS Characteris
Page 165 and 166: terrain is in the composition of a
Page 167 and 168: Such characteristics require the ne
Page 172 and 173: Australia) with high resolution nit
Page 174 and 175: some important medicinal plants of
Page 176 and 177: RFV = [120 / NDF] × [88.9 - (0.779
Page 178 and 179: Scientific Papers. Series A. Agrono
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average at Viani - Brila County). A
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Figure 1. Dry above-ground biomass
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County) and 30.29% (CERA 270 hybrid
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phenological stages were found to h
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STUDIES REGARDING THE INFLUENCE OF
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ainfall were able to have a negativ
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Figure 7. Thermo-hydric stress fact
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In Romania is grown a large assortm
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Mainly vitamin C, E and polyphenols
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soluble compounds with antioxidant
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primarily the water-soluble antioxi
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has a split-split-plot design with
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Kovács B., Gyori Z., Prokisch J.,
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pays off (Mares et al., 2004; Gonz
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Table 3. Tested variants V1 Control
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about the inner value of flora. The
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MATERIALS AND METHODS Biological ma
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Figure 2. Correlation between prote
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CONCLUSIONS Production and quality
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The following presents several tech
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3. Evolution of total weed number i
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RESEARCH ON APPLICATION OF NPK FERT
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Also increase production significan
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In April 2012, the pre-sowing proce
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difference with the hoed control sa
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RESULTS AND DISCUSSIONS Data about
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Table 7. Proved difference between
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Table 1. Variance analysis experien
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Amongst the three precocity groups,
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ACKNOWLEDGEMENTS This study was car
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to present genetic sources of resis
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REFERENCES Antonova T.S., Araslanov
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Halstedii is necessary to identify
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EFFICIENCY OF UTILIZATION OF ASELEC
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to separate the effects of genotype
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INFLUENCE OF THE CLIMATIC CONDITION
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In 2012, at NARDI Fundulea, data fr
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parameter from the treated variants
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Table 6. The effectiveness of some
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Table 1. Probability of the meteoro
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At 50% DI in EOF, only a small part
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This was probably due to the specif
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under deficit irrigation. This prov
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RESULTS AND DISCUSSIONS Intervals w
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productions from one year to anothe
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epresented by soil ecologization an
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new created ones as a basic conditi
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The highest number of kernels per e
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Table 8. Average weight of thousand
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CONCLUSIONS The drought from the ye
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IWM as appropriate, necessary studi
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100% in the first 6 weeks of growth
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locules boll -1 (0.02), seeds locul
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Bhutto H., Baloch M.J., Yousaf M.,
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Table 4. GCA effects for morpho-yie
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MATERIALS AND METHODS This study wa
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vegetation of each of the swaths, i
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Sudangrass hybrids depending on the
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The parameters of biomass and dry m
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transplanting and ½ applied at fir
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Fertilization Forms Table 2. The me
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growing agricultural farms; evoluti
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In this area, priority must be to p
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soybean seeds are found farms that
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are a better material for haploid i
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Figure 6. Embryo and endosperm mark
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RESEARCHES CONCERNING THE INFLUENCE
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Table 1. The influence of seeding d
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Exagone hybrid. Thus, when sown at
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Table 9. The influence of sowing di
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MATERIALS AND METHODS In order to k
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Table 3. Genotype influence on whea
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Romanian varieties from the experim
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Table 2. Efficacy of some fungicide
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ROMANIAN WHEAT - STRATEGIC PRODUCT
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exceeded 2,000 thou ha, and maximum
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Values over 26% wet gluten were det
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effective and can build a significa
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grassland. This method is commonly
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RESULTS REGARDING DROUGHT RESISTANC
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average for this period is 170.6 mm
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Hybrid FAO grupe Table 2. The main
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length has lowest values at the unt
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CHARACTERISTICS OF SECOND GENERATIO
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developed in Dobrudzha Agricultural
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Table 5. Cytological characteristic
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We can see in the table that all li
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RESULTS AND DISCUSSIONS Mean compar
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Table 4. Statistical interpretation
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COMPARATIVE STUDY OF CONVENTIONAL A
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Improved sunflower hybrids for use
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differences in production to contro
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International Center for Agricultur
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Table 3. Evaluation of Genotypes fo
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Table 1. Characteristics of city sl
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Table 4. Amount of the rainfall dur
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ECOLOGICAL AGRICULTURE
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maize had a density of 5 plants/m 2
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CONCLUSIONS In terms of productivit
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amino acids, such as 4-hydroxyisole
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Table 5. Determining chlorophyll pi
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PROPOSALS ON TECHNOLOGY OF MOVING A
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These are the main technical charac
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FUNGAL BIODIVERSITY AND CLIMATE CHA
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Climate change effects and Dobrogea
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Figure 10. Pure culture of benefici
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MANAGEMENT OF BENEFICIAL MICROORGAN
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microorganisms DSMZ Braunschweig -
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Protocol of research and reporting
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“HERBAL MEDNET” AN INNOVATIVE A
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Figure 2. Value of global herbal ma
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Figure 3. The Allelopathy effect on
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AGRICULTURAL ENGINEERING AND RENEWA
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Research was also aimed at observin
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Leaf production of dry matter per h
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cooking oil and jatropha oil (Vonsh
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machines, many different fat extrac
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Table 4. The nutrient content Conte
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Figure 21. Dunaliella salina sp. ch
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for the decline is the growing numb
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Tractor power seemed the obvious wa
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Figure 4 shows that in 17 post war
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their employability, help raise the
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. Scientific Papers. Series A. Agro
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through the sprinkler irrigation. A
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Figure 5. Overlapping sprinklers wi
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CLIMATE CHANGE AND AGROMETEOROLOGIC
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Bulgaria to the use of agroclimatic
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Figure 9. Duration of the period so
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Figure 18. Evapotranspiration of wi
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RESULTS AND DISCUSSIONS After scari
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The influence of the texture on the
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Figure 6. Area of land planted with
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APPLIED BIOLOGY IN AGRICULTURAL SCI
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MATERIALS AND METHODS Researches we
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RESEARCHES REGARDING EVOLUTION OF S
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gradually reduce towards the end of
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According to that, the aspect of th
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etween classes of variation with ma
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Table 2. Average heights of Lycium
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V 1 V 2 Table 6. Average shoot leng
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Table 13. Average dry substance of
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centrifuge (7000 rev/min. during 20
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7, Streptomyces sp. 9, and Streptom
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laboratory of Biology, USAMV Buchar
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SOME NEW SPECIMENS FOR ZOOLOGICAL T
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New reptiles for our teaching colle
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Figure 1. Scatter plot of odontosty
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Table 4. Measurements of Xiphinema
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Malus pumila and P. avium are new h
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- the mean, minimum and maximum mon
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The monthly mean of the flow highli
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longer in balance with the existing
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ecording the encountered plant spec
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Mediterranean (3), Balkan (1), Cent
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Table 3. Segetal species of the Top
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of sugar/flower and the honey poten
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Territorial concentration of mellif
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CONCLUSIONS In Giurgiu County there
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farm (Awake, 1998). Rahman et al. 2
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Table 3 shows that there was a high
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RESULTS AND DISCUSSIONS x, k, r, R
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Figure 3. Us-Pressure Relations of
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