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Search Results: 1 - 10 of 242 matches for " Ivica Kisi? "
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Crop Yield and Plant Density under Different Tillage Systems
Ivica Kisi,Ferdo Ba?i?,Marta Birkas,Aleksandra Juri?i?
Agriculturae Conspectus Scientificus (ACS) , 2010,
Abstract: To determine the optimal ploughing depth and to make tillage simpler and less costly, but also taking account of edaphic and climatic conditions as well as biological and agrotechnical requirements of crops grown, long-term investigations (1994-2009) have been carried out on Stagnic Luvisol of sloping terrains in central Croatia near Daruvar. The paper presents the results relating to plant density and yields of maize (Zea mays L.), soybean (Glycine max L.), oilseed rape (Brassica napus L.), winter wheat (Triticum aestivum L.) and spring barley (Hordeum vulgare L.). Investigation results point to the conclusion that high density crops (winter wheat, spring barley and oilseed rape) are suitable for growing under reduced tillage systems. Yields of low density spring crops (maize and soybean) obtained under the no-tillage system are not satisfactory, especially in climatically extreme years.
The Effect of Fertilization and Limingon Some Soil Chemical Properties of Eutric Gleysol
Ivica Kisi,Ferdo Ba?i?,Milan Me?i?,An?elko Butorac
Agriculturae Conspectus Scientificus (ACS) , 2004,
Abstract: The effect of different rates of mineral and organic fertilizers, liming and twotypes of zeolite tuffs upon the changes in the soil chemical complex were monitored in an exact field trial set up on Eutric Gleysol near Karlovac in Central Croatia. The trial was set up according to the randomized block method with four replications. The four-year investigations revealed a significant increase in pH values in treatments with hydrated lime, as well as in variants in which special natural amendments based on zeolite tuffs were applied. The applied rates of liming materials led to a significant increase in the base saturation of the cation exchange capacity as well as in content of investigation nutrients - phosphorus and potassium. While organic fertilizers and zeolite tuffs had less effect on changes of the studied parameters, significantly greater changes of the studied parameters (pH, cation exchange capacity, content of phosphorus and potassium) were recorded in treatments in which the hydrated lime was combined with mineral fertilizers.
Possibilities for the Use of Oil Contaminated Solids for Agricultural Purposes
Ivica Kisi,Ferdo Ba?i?,Vladislav Brki?,Sanja Mesi?
Agriculturae Conspectus Scientificus (ACS) , 2007,
Abstract: All phases of oil exploitation, from the start of oil-drilling works to construction of the transport system (underground pipeline network) are accompanied by interventions and procedures hazardous to the environment. Although the state-of-the-art technical solutions and modern materials used by INA in all exploitation phases warrant a high level of safety, the possibility of different incidents is unfortunately not fully excluded.Incidents endanger natural resources, primarily soil and water, and may, depending on their severity, jeopardize for a certain length of time the intended use of the land on which the incident occurred, that is, rule out the possibility of its use for plant or livestock production.In the last two decades, the staff members of the Faculty of Agriculture Department of General Agronomy participated in the number of studies dealing with the evaluation of the extent of contamination of soil on which an oil incident occurred and drew up studies and plans for remediation of such soils. The paper presents the results of threeyear-long research on growing winter wheat (Triticum aestivum L.), winter barley (Hordeum vulgare L.) and soybean (Glycine hyspida L.) in pots under different degrees of soil contamination by oil. Research involved monitoring of changes in the soil chemical complex (pH, changes in plant available phosphorus and potassium, content of organic matter); also monitoring of number of plants, achieved yields and studying chemical changes in plant material caused by different degrees of soil contamination.
Soil Erosion by Water in Perennial Plantations of the Ilok Region
Antonija Kustura,Ivica Kisi,Ferdo Ba?i?,Aleksandra Juri?i?
Agriculturae Conspectus Scientificus (ACS) , 2008,
Abstract: Soil erosion by water is a natural process, in which soil particles get detached from soil mass, transported and deposited at a distance. Erosion depends on a number of natural factors, such as terrain slope, amount and intensity of precipitation, soil (structure, mechanical composition, permeability, infiltration, etc.), wind, crop rotation, and plant cover. Soil erosion by water is one of the most dangerous soil damaging processes. In the hilly part of the studied region, erosion causes great problems to fruit and wine production. The principal goal of this work is to find ways of reducing erosion by applying appropriate agricultural management practices, different methods of plant residue management, and radical conservation practices. Research results indicate that erosion cannot be prevented (especially in case of extreme weather conditions – very intensive precipitation), but it may be reduced to a tolerable level by selecting optimal agricultural practices.
The Effect of Liming and Fertilization on Yields of Maize and Winter Wheat
Ivica Kisi,Ferdo Ba?i?,Milan Mesi?,An?elko Butorac
Agriculturae Conspectus Scientificus (ACS) , 2004,
Abstract: Effect of different rates of hydrated lime and zeolite tuffs, as lime materials, mineral and organic fertilizers upon the yield of maize and winter wheat grain was studied in an exact field trial set up on Eutric Gleysol, near Karlovac, Central Croatia. The following crops were cultivated during the study period: 1999 and 2001 – maize, 1999/00 and 2001/02 – winter wheat. In the first investigation year, the highest yield of maize grain of 9.78 t ha-1 was achieved with the combination of the higher mineral fertilizer rate and the higher rate of farmyard manure. In the following year, the highest yield of winter wheat grain of 5.85 t ha-1 was achieved with the combination of the higher mineral fertilizer rate and the higher rate of hydrated lime. In the third and fourth investigation years, the highest yields of maize grain (10.05 t ha-1) and wheat (5.48 t ha-1) were recorded for the combination of the higher rates of mineral fertilizers and hydrated lime. The foregoing allows the conclusion that mineral and organic fertilization combined with hydrated lime is the optimal solution for increasing the yields of test crops.
Losses of Ca, Mg and SO4 2-S with Drainage Water at Fertilisation with Different Nitrogen Rates
Milan Mesi?,Ivica Kisi,Ferdo Ba?i?,An?elko Butorac
Agriculturae Conspectus Scientificus (ACS) , 2007,
Abstract: Quantities of Ca, Mg and SO4 2- S leached by drainpipe water from drained Stagnosols of Central Croatia are determined for the period from 1997 to 2004 Ca2+, Mg2+ and SO4 2- S concentration in drainage water varied in dependence on the crop type and development stage, on the fertilization, on the quantity and intensity of precipitation, and on the drainage volume. In 8-year average, quantities of Ca, Mg and SO4 2- S leached with drainage water at selected trial treatments with uniform P and K fertilisation and with diff erent nitrogen rates varied from 96.6 to 142.4 kg ha-1, from 46.7 to 69.2 kg ha-1 and from 10.6 to 15.2 kg ha-1, respectively.
Determination of Soil pH in Dominant Soil Types in the Republic of Croatia
Darija ?apka,Ivica Kisi,?eljka Zgorelec,Milan Mesi?
Agriculturae Conspectus Scientificus (ACS) , 2009,
Abstract: Soil pH is a basic soil parameter, since many processes in the soil depend on it, such as the growth and development of plants. Therefore, the monitoring of soil pH is very important. In this paper the values of soil pH are obtained by measurement of the samples in three media: H2O, KCl and CaCl2. The sampling was conducted at 18 locations on 11 soil types and 15 lower systematic units. The aim of this work was to establish functional connections between the pH values in all three media.Repeatability of measurement expressed through the relative standard deviation, ranged from 0.21% to 3.87% in the H2O suspension, from 0.19% to 7.74% in the KCl suspension and from 0.25% to 4.19% in the CaCl2 suspension. Correlation coefficients varied in the classes: strong, very strong and absolute. The correlation coefficients for all measured samples were: r=0.96 for the pH KCl/H2O; r=0.97 for the pH KCl/CaCl2 and r=0.99 for the pH H2O/CaCl2 (absolute correlation). The correlation coefficients determined in the acid soils were: r=0.97 for the pH KCl/CaCl2 and pH H2O/CaCl2; r= 0.91 for the pH KCl/ H2O (absolute correlation). In the neutral soils, the correlation coefficient for the pH KCl/CaCl2 was r=0.69 (strong correlation), correlation coefficient for the pH KCl/H2O was r=0.80 (very strong correlation) and the correlation coefficient for the pH H2O/CaCl2 was r=0.92 (absolute correlation). In the alkaline soils, the correlation coefficient for the pH KCl/CaCl2 and pH KCl/H2O was r=0.66 (strong correlation), and correlation coefficient for the pH H2O/CaCl2 was r=0.88 (very strong correlation).The existence of alleged functional connections through this work has been proven with very high significance.
Soil Tillage Needs a Radical Change for Sustainability
Márta Birkás,Márton Jolánkai,Ivica Kisi,Bojan Stipe?evi?
Agriculturae Conspectus Scientificus (ACS) , 2008,
Abstract: In Central Europe, the challenge in soil tillage throughout the last century can be characterized as a fight against extreme climatic and economic situations. From 1800s till the 1970s, the main requirement of soil tillage was to provide suitable soil conditions for plant growth (moreover with fi ne structure). Both climatic and economic difficulties were beneficial in establishing new tillage trends, however overestimation of the crop demands have presumably been promoted by the deterioration in soil quality. From the end of the 1990s, new requirements have also been introduced because of the rise in energy prices and because of the need to cut production costs. The reduced tillage in Central European region showed some advantages, e.g. less soil disturbance and traffic however, that resulted in new soil condition defects (e.g. top- and subsoil compaction, structure degradation). The ideas of sustainability offered a better solution that is to conserve soil resources and to protect the environment. A new problem, the global climate change, and the importance of the adaptability fasten to the original sustainable goals. In this paper the features of soil quality deteriorating tillage (conventional, over-reduced) are summarised, the steps of improvement are demonstrated, and factors affecting sustainable soil tillage are formulated.
Subsoil Compaction as a Climate Damage Indicator
Márta Birkás,Ivica Kisi,László Bottlik,Márton Jolánkai
Agriculturae Conspectus Scientificus (ACS) , 2009,
Abstract: Some forms of soil compaction occur on arable lands both in Hungary (1.82 million ha) and in Croatia (0.97 million ha) having negative impacts on agricultural production. Tillage-induced subsoil compaction has oft en occurred in the Pannonian region in relation to traffic-induced compaction.Soil compaction has become a soil management problem during the last decade as a result of the occurrence of periods of water-logging as well as droughts. This study contains an evaluation of factors relating to subsoil compaction, as indicator of climate effects on arable fields. This paper is based on soil condition monitoring and measuring that was started 32 years ago and on short and long-term experiments modeling and checking the extension of compaction in the soil. The survey comprised 1526 monitoring places and 38 experimental plots. The following five points were chosen for monitoring: 1) root zone state (to a depth of 0-60 cm); 2) occurrence of compacted layer (indicating likelihood of risk); 3) extension of the compacted layer (indicating the degree of damage); 4) long term effects of tillage (soil state deterioration or improvement), and 5) tillage-induced water-logging and drought damage impacts on yield loss. The main objectives of the experiments were: 1) occurrence and the extent of tillage-pan damage in soils of different susceptibility to compaction; 2) consequences on water management in each of the years covered by the experiments; 3) soil quality consequences, and 4) alleviation of pan-compaction by mechanical and biological methods. Long-term field monitoring and experimental work have both convincingly proven a correlation between subsoil compaction and the degree of climatic damage. In view of the findings, trends in soil tillage can be grouped into the following two categories: climate damage mitigating and climate-stress increasing ones. The formation and location of compacted layers provided information concerning the depth, the method and the type of tillage applied, along with the expected risk for crop production under extreme climate conditions.
Determinants of Delay in Malaria Prompt Diagnosis and Timely Treatment among Under-Five Children in Shashogo Woreda, Hadiya Zone, Southern Ethiopia: A Case Control Study  [PDF]
Ermias Abera Turuse, Kassahun Alemu Gelaye, Teresa Kisi Beyen
Health (Health) , 2014, DOI: 10.4236/health.2014.610120
Abstract: Background: Ensuring prompt diagnosis and timely malaria treatment will prevent most cases of uncomplicated malaria from progressing to severe and fatal illness. To avoid this progression, treatment must begin as soon as possible, generally within 24 hours after symptoms onset. The reason why mothers/caretakers delay in malaria prompt diagnosis and timely treatment for under-five is not well studied in the study area as well as in Ethiopia. Objective: To assess determinants of delay in malaria prompt diagnosis and timely treatment among under-five children in Shashogo Woreda, Hadiya Zone, Southern Ethiopia, 2013. Methods: An unmatched case control study was conducted from March 25-April 25, 2013. A total sample size of 302 with 151 cases and 151 controls were selected by systematic random sampling techniques. Cases were under-five children who had clinical malaria and sought treatment after 24 hours of symptoms onset, and controls were under-five children who had clinical malaria and sought treatment within 24 hours of symptoms onset. Both bivariate and multivariate logistic regressions were done to identify determinant of delay in malaria prompt diagnosis and timely treatment. Results: A total of 151 mothers/caretakers of cases and 151 mothers/caretakers of controls were interviewed. Illiterate mothers (AOR = 7.14; 95%CI: 1.10, 46.39), monthly income ≤500 ETB (AOR = 5.49; 95%CI: 2.09, 14.45), females sex (AOR = 3.45; 95%CI: 1.62, 7.34), distance from health facility >5 km (AOR = 4.31; 95%CI: 1.22, 15.23), absence of history of child death (AOR = 4.21; 95%CI: 1.514, 11.68), side effects of antimalarial drugs (AOR = 2.91; 95%CI: 1.15, 7.33) and khat chewing (AOR = 2.38; 95%CI: 1.28, 5.79) were determinants of delay in malaria prompt diagnosis and timely treatment of under-five children. Conclusion: Mother’s education, monthly income, distance from health facility, absence of history of child death, complained about side effects of drugs and khat chewing were predictors of delay of prompt diagnosis and timely malaria treatment. Effective malaria control programs revision would be required to avoid delay of prompt diagnosis and timely treatment for under-five children.
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