Vojtěch Lukas, Fernando Rodriguez-Moreno, Tamara Dryšlová and Lubomír Neudert
This paper examines the relationship among chlorophyll meter Yara N-Tester readings, nutrition status and growth parameters (leaf area index (LAI), plant height) of the winter wheat plants. Data used in this study were collected in 2010 from two fields located in the Czech Republic (area 52 and 38 ha) from different farms, both with uniform and conventional crop management. The monitoring of crop stands was done at growth stage BBCH 30 in a regular sampling grid with 150 m distance between points (27 and 18 points). At each sampling point, the plant height, LAI (Delta-T SunScan) and the chlorophyll concentration (Yara N-Tester) were recorded. Plant samples were taken to analyse the content of main nutrients (N, P, K, Mg, Ca and S). The results of plant analysis showed that both fields were in different nutrition status: one in a correct status and another had a complex nutritional deficit (K, Ca and N). Linear regressions and ANOVA proved that under a multiple nutritional deficit, N-Tester readings responded to the growth of the crop, while in the adequate nutritional conditions the sensitivity of N-Tester to the variation in the nitrogen concentration is lower. The relationships between crop parameters and chlorophyll meter readings are not generalisable and thus the interpretation of N-Tester results has to be done separately for each field.
The research was conducted at the Agriculture Research Farm, Faculty of Agriculture, University of Suez Canal, during the sesame growing seasons of 2011 and 2012. For studying the impact of insect pollination and nitrogen fertilization on sesame production, the experiment was divided to 13 treatments of open pollination and non open pollination, with three different levels of ammonium nitrate (NH4NO3) and one level of seryalin as biofertilizer. Non opened pollination treatments were covered before the start of flowering period with a perforated net bag, to allow the air to pass through and to prevent insects from approaching the plants. Quantitative and qualitative indicators, were measured as follows: rate of capsule per plant, capsule weight, rate of seeds in each capsule, weight of 1000 seeds, germination (%), seedlings vigour and oil content (%). Results clearly demonstrate that qualitative and quantitative indicators of sesame crop was significantly increased with opened pollination and with the increase of nitrogen fertilizer level up to 40 kg N/feedan-1 plus or minus seryalin, in reclaimed sandy soils, in Ismailia, Egypt.
C. Ailincăi, G. Jităreanu, D. Bucur and Despina Ailincăi
Soil Quality and Crop Yields, After Utilization of Sewage Sludge on Agricultural Land, in the Moldavian Plain, Romania
Investigations conducted at the Podu-Iloaiei Agricultural Research Station, Iaşi County, have studied the influence of different sewage sludge rates on yield quality and quantity and soil agrochemical characteristics. Trials were set up in a five year-crop rotation, winter rape-wheat-maize-sunflower-wheat. Sewage sludge was applied every 2 years at rates of 20, 30, 40 and 60 t/ha, with different mineral fertilizer rates, differentiated according to the growing plant. The Cambic Chernozem used for experiments had a clayey-loam texture (410 g clay, 310 g loam and 280 g sand), a weakly acid reaction and a mean supply with mobile phosphorus and a very good one with mobile potassium. Applying rates of 30 t/ha sewage sludge has resulted in the accumulation of mobile phosphate stock in soil of 57 mg/kg and the microelement content, mobile forms from soil, was of 7.9 mg/kg at Cu, 1.4 mg/kg at B, 6.8 mg/kg at Zn and 186 mg/kg at manganese. The combined use of mean rates of mineral fertilizers (N100P80), together with 40 t/ha sewage sludge has resulted in improving soil chemical characteristics and getting yield increases in winter rape of 1854 kg/ha (108 %). After 8 years since the application of a rate of 30 t/ha sewage sludge, soil pH has increased 0.4 units, while phosphorus and potassium content from soil has increased by 30 and 52 mg/ kg soil, respectively. Sewage sludge from the Iaşi Water Treatment Station, which was applied every two years at rates of 20 and 30 t/ha, has determined the increase in the organic carbon content from soil by 2.9 g/kg (18%) and 4.4 g/kg (28%), respectively, compared to the unfertilized variant. The copper and zinc content from grains in wheat and maize crops, fertilized with 30 t/ha sewage sludge, was by two-four times higher, compared to the unfertilized control.
Eugeniusz Kołota and Katarzyna Adamczewska- Sowińska
cropsfertilized with ammonium based fertilizers containing the new nitrification inhibitor DMPP (Entec). Abstracts of XXVIth Int. Hort. Congress Toronto: 100.
Hochmuth G. J. 2003. Progress in mineral nutrition and nutrient management for vegetable crops in the last 25 years. HortScience 38 (5): 999-1003.
Kołota E., Adamczewska-Sowińska K. 2007. [The effect of Entec 26 - stabilized nitrogen fertilizer on yielding of early leek.] Rocz. AR w Poznaniu. Ogrodn. 41 : 529-532. [in Polish with English summary
Katarína Ondreičková, Mária Babulicová, Daniel Mihálik, Marcela Gubišová and Jozef Gubiš
BIZÍK, J. - FECENKO, J. - KOTVAS, F. - LOŽEK, O. 1998. Methodology of cropfertilization and nutrition. Bratislava : AT Publishing, 113 pp. ISBN 80-967812-1-9
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FERNANDES, E.C.M. - MOTAVALLI, P.P. - CASTILLA, C. - MUKURUMBIRA, L. 1997. Management control
] Zemanek A, Zemanek B. Roślina i sacrum w historii cywilizacji [The plant and the sacrum in the history of civilization]. In: Domański B, Skiba S, editors. Geografia i Sacrum. 2005;2:471-480. http://www.geo.uj.edu.pl/publikacje,000080 .
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catchments in Central Germany. Sci. Tot.Environ. 407, 3459-3472.
32. Maeda, M., Zhao, B., Ozaki, Y. & Yoneyama, T. (2003). Nitrate leaching in an Andisol treated with different types of fertilizers. Environ. Pollut. 121(3), 477-487. DOI: dx.doi.org/10.1016.
33. Erhart, E., Feichtinger, F., & Hartl, W. (2007). Nitrogen leaching losses under cropsfertilized with biowaste compost compared with mineral fertilization. J. Plant Nutr. Soil Sci., 170(5), 608-614.
34. Czyżyk, F. & Rajmund, A. (2011). Quantity of nitrogen deposited in
Mihaela-Doina Niculescu, Doru-Gabriel Epure, Magdalena Lasoń-Rydel, Carmen Gaidau, Mihai Gidea and Cristina Enascuta
Biocomposites based on extracts of collagen and keratin recovered from the leather industry by-products have the ability to form films with controlled biodegradability.
Treating rape seeds with biocomposites based on extracts of collagen and keratin leads to total biomass increase up to 38%.
Biocomposites based on extracts of collagen and keratin recovered from the leather industry by-products presents properties that can be exploited, such as cropfertilization and crop protection products, soil quality improvement products or as sowing and planting media