Plant, Soil and Environment, 2003 (vol. 49), issue 8
The dry nitrogen yields nitrogen uptake, and the efficacy on nitrogen fertilisation in long-term experiment in Prague
J. Kubát, J. Klír, D. Pova
Plant Soil Environ., 2003, 49(8):337-345 | DOI: 10.17221/4134-PSE 
Long-term field experiments conducted under different soil and climate conditions and their databases provide invaluable information and are indispensable means in the study of the productivity and sustainability of the soil management systems. We evaluated the results of the dry matter yields of the main products obtained with four variants of organic and mineral fertilisation in three long-term field experiments established in 1955. The experiments differed in the cultivated crops. The period of evaluation was 12 and 16 years (1985-2000), respectively. The productivity of nine-year crop rotation was lower with the fertilised variants than that with...
Chemical and biological characteristics of reclaimed soils in the Most ŕegion (Czecg Reooublic)
L. Růžek, K. Voříšek, J. Vráblíková, S. Strnadová, P. Vráblík
Plant Soil Environ., 2003, 49(8):346-351 | DOI: 10.17221/4135-PSE
Soil organic carbon content [Corg], pHH2O, pHKCl and microbiological characteristics (microbial biomass carbon [CMB], extracellular microbial carbon [CEX], respiration, ammonification, and nitrification) were studied in 11 reclaimed soils, where the technical reclamation was carried out by Most Coal Mining Company in the year 2000 or 2001. These soils were immediately sown with legumes and grasses. Corg content in soil was rather wide ranging between 0.15-4.82%. The lowest value was determined in loess applied in the year 2001 at the locality No. 6 Mine Most, and the highest one at the locality No. 5 Mine Most amended with pulp wastes and sewage sludge...
Effect of land management without farmyard manure application on the amount and the ectivity of soil microbial biomass
T. Števlíková, J. Vjatráková, S. Javoreková, S. Mátéová
Plant Soil Environ., 2003, 49(8):352-358 | DOI: 10.17221/4136-PSE
Four kinds of cereal crops were grown without farmyard manure application. The effect of farmyard manure was supposed to be replaced by post-harvest residues (PH treatment) or by ploughing the total by-product, i.e. straw (PZ treatment) into soil. After seven years of application, this soil farming system did not influence the contents of Cox and Nt in soil. The amount of organic carbon had declined after the first year, but in the following years it remained at the same level (1.2%). The total nitrogen content increased from 0.143 to 0.166% without any considerable difference between the treatments. The amount of microbial biomass (Cmic)...
Utilization of the biological nitrogen fixation for soil evaluation
T. Šimon
Plant Soil Environ., 2003, 49(8):359-363 | DOI: 10.17221/4137-PSE
Non-symbiotic nitrogen fixation (potential nitrogenase activity - PNA) of soil samples originating from different plots of long-term field experiments (selected variants: Nil, NPK [mineral fertilisation: 64.6-100 kg N/ha/year], FYM [farmyard manure], and FYM + NPK from three blocks III, IV and B with different crop rotation) was determined in laboratory experiments. The symbiotic nitrogen fixation (total nitrogenase activity - TNA) of the same soil samples was evaluated in hydroponic experiments with pea (2001, 2002) and lucerne (2001) in which the soil samples were used as a natural inoculum. The high values of PNA were found in the variants fertilised...
Morphometry analysis and seed germination of Amaranthus cruentus, A. retroflexus and their hybrid (A. × turicensis)
V. Lanta, P. Havránek, V. Ondřej
Plant Soil Environ., 2003, 49(8):364-369 | DOI: 10.17221/4138-PSE
A morphometric study of Amaranthus cruentus, A. retroflexus and their hybrid, A. × turicensis based on 75 plant samples (750 inflorescences), collected throughout the Olomouc-Holice area (Czech Republic), is presented. Using multivariete methods (including cluster analysis and canonical discriminant analysis), the existence of three groupings of plants was proven. The hybrid exhibited intermediate values of the width and length of female tepals, length of awl-shaped bracts, and seed size when compared with parental species. A germination experiment showed that dark seeds of A. × turicensis as...
Effect of white fleece on the selected quality parameters of early potato (Solanum tuberosum L.) tubers
J. Lachman, K. Hamouz, A. Hejtmánek, J. Dudjak, M. Orsák, V. Pivec
Plant Soil Environ., 2003, 49(8):370-377 | DOI: 10.17221/4139-PSE
The effects were tested of white fleece on the contents of ascorbic acid, nitrates, and polyphenols in 1999 and 2000, and on the carotenoids content in 2000 and 2001 intubers of two early potato varieties (Adora and Impala) in field trials on two cultivation sites (Přerov n/Labem and Prague-Troja). Early irrigated potatoes were cultivated according to the uniform methodology for field trials. Two variants were compared - cultivated plants covered with white fleece (Pegas-Agro UV 17) and the controls without any covering. The tubers were harvested three times in intervals of 7-16 days. The results were statistically tested by ANOVA and Tukey's methods....
Possible role of the soil in the sissoo forest (Dalbergia sissoo Roxb.) decline in the Nepal terai
S.P. Sah, C.K. Sharma, F. Schested
Plant Soil Environ., 2003, 49(8):378-385 | DOI: 10.17221/4140-PSE
This paper deals with the recent sissoo (Dalbergia sissoo Roxb.) decline in the plain land (locally called as terai) of Nepal. This study has made an attempt to find the possible causal factor of this decline. The study has made some initiative in this aspect and has made a comparative study of 30 different sissoo forest (both natural and plantation) stands. The symptoms of the sissoo decline were found to be varied. But in most of cases, the top dying of crown was found to be the most prevalent. The top dying starts from the top of the tree and progressively proceeds downwards to the stem. The leaves become yellow. Until now, it has been...