scholarly journals Quantitative PCR shows propagation of Plasmodiophora brassicae in Swedish long term field trials

2016 ◽  
Vol 145 (3) ◽  
pp. 573-581 ◽  
Author(s):  
Jonsson Anders ◽  
Marzec-Schmidt Katarzyna ◽  
Börjesson Gunnar ◽  
Wallenhammar Ann-Charlotte
Keyword(s):  
Quantitative Pcr ◽  
Plasmodiophora Brassicae ◽  
Field Trials ◽  
Term Field

scholarly journals Erratum to: Quantitative PCR shows propagation of Plasmodiophora brassicae in Swedish long term field trials

2016 ◽  
Vol 147 (4) ◽  
pp. 963-963
Author(s):  
Jonsson Anders ◽  
Marzec-Schmidt Katarzyna ◽  
Börjesson Gunnar ◽  
Wallenhammar Ann-Charlotte
Keyword(s):  
Quantitative Pcr ◽  
Plasmodiophora Brassicae ◽  
Field Trials ◽  
Term Field

Correlation Between Soil P and Wheat Shoot P Contents in a Network of Hungarian Long‐Term Field Trials

2005 ◽  
Vol 36 (1-3) ◽  
pp. 275-293 ◽  
Author(s):  
Péter Csathó ◽  
Marianna Magyar ◽  
Katalin Debreczeni ◽  
Katalin Sárdi
Keyword(s):  
Field Trials ◽  
Soil P ◽  
Wheat Shoot ◽  
Term Field

scholarly journals Drought response of modern and old oat lines in greenhouse and long-term field trials

1997 ◽  
Vol 6 (2) ◽  
pp. 199-205 ◽  
Author(s):  
Pirjo Mäkelä ◽  
Leena Väärälä ◽  
Riikka Rajalahti ◽  
Ari Rajala ◽  
Pirjo Peltonen-Sainio
Keyword(s):  
Grain Yield ◽  
Field Experiments ◽  
Field Trials ◽  
Drought Response ◽  
Wild Oat ◽  
Greenhouse Experiments ◽  
Plant Breeding Institute ◽  
The University ◽  
Term Field

This study compares the response of old and modern oat (Avena sutiva L.) lines to pre-anthesis precipitation in long-term field trials, and to pre- and post-anthesis drought in the greenhouse. Long-term field trials were carried out at the Experimental Farms of Hankkija Plant Breeding Institute and the University of Helsinki between 1965 and 1988. Grain yield of 12 oat lines (released since 1959) was compared with that of the check lines. The effect of differences in May-June precipitation on grain yield was established for different lines. Greenhouse experiments included 19 oat lines (released since 1921) and three wild species of oat (A. barbata L., A. sterilis max. L. and A. fatua L.). The data from greenhouse experiments were analysed using discriminant analysis in groups of old (released before 1970s), modern, and wild oat types. Ranking of the oat lines according to results from long-term field trials and greenhouse experiments was not consistent; contrary to the field experiments, the old lines tended to be the most drought sensitive when tested in the greenhouse. Therefore, the simple and non-laborious methods used in this study for ranking of drought sensitivity of oat lines are not recommended.

scholarly journals Points to be considered in the establishment of long-term field trials

1964 ◽  
Vol 36 (1) ◽  
pp. 51-55
Author(s):  
Yrjö Pessi
Keyword(s):  
Field Tests ◽  
Soil Surface ◽  
Field Trials ◽  
Soil Characteristics ◽  
Test Area ◽  
Test Plot ◽  
Experimental Station ◽  
Term Field

On the basis of the experience gained in the long-term field tests at the Experimental Station of Leteensuo, some of the factors have been examined which have to be taken into consideration when tests of this kind are established. It is noted that in the course of time the soil may become increasingly inhomogeneous, e.g. owing to sludge brought in by inundations, and owing to the wear of the peat on cultivated peat land. An initial shaping of the soil surface is essential in the case of cultivated peat lands because non-uniform settling of the soil may occur in the course of time in the test area. The soil surface of the different test members may also settle in different degrees, depending on the treatment involved in the test. Because of soil transportation from one test plot to another, caused by the tilling operations, the location and shape of the test plots are of significance in long-term tests intended to clarify questions associated with soil characteristics.

scholarly journals Field-screening Prunus for Longevity in the Southeastern United States

HortScience ◽  
1994 ◽  
Vol 29 (6) ◽  
pp. 673-677 ◽  
Author(s):  
W.R. Okie ◽  
G.L. Reighard ◽  
T.G. Beckman ◽  
A.P. Nyczepir ◽  
C.C. Reilly ◽  
...  
Keyword(s):  
South Carolina ◽  
Prunus Persica ◽  
Southeastern United States ◽  
Field Trials ◽  
Root Knot Nematode ◽  
Short Life ◽  
Wide Range ◽  
Apparent Relationship ◽  
Term Field

Long-term field trials of a wide range of peach [Prunus persica (L.) Batsch] germplasm on two peach tree short-life (PTSL) sites revealed marked differences in survival among lines. Generally, cuttings and seedlings of a given line performed similarly, as did ungrafted seedlings and their counterparts grafted to a commercial cultivar. No apparent relationship existed between a line's chilling requirement and survival. B594520-9 survived best in Georgia and South Carolina, providing significantly greater longevity than Lovell, the standard rootstock for use on PTSL sites. B594520-9 is derived from root-knot-nematode-resistant parentage, and progeny of surviving seedlings have demonstrated root-knot resistance similar to Nemaguard seedlings.

scholarly journals Correlations Among Different P-Test Methods Studied in a Network of Hungarian P Fertilization Long-term Field Trials

2002 ◽  
Vol 51 (1-2) ◽  
pp. 167-176 ◽  
Author(s):  
Marianna Magyar ◽  
P. Csathó ◽  
K. Debreczeni ◽  
Keyword(s):  
Field Trials ◽  
Test Methods ◽  
P Fertilization ◽  
P Values ◽  
Soil P ◽  
Soil Group ◽  
Soil P Test ◽  
Plant P Uptake ◽  
Term Field

Five soil P-test methods were compared on the soils of the network of unified Hungarian P fertilization long-term field trials. The effect of P application on the soil P-test values was significant on the different P levels and sites. The average effect of the sites varied between 1.5-fold (H 2 O method) and 3.7- fold (AL-method). The amounts of extracted P increased in the order of H 2 O-P < Olsen-P < Pi-P < AERM-P < AL-P < Corrected AL-P. For studying the relationships between the P values extracted by the different methods, acidic, calcareous and all soils groups were taken into account as a basis. A good correlation was found between the Pi- and AERM-methods in each soil group. Within the acidic soil group, pH has a much less expressed effect on AL-P values, presumably this was the reason why the strongest correlation in this soil group was found between the AL- and the Corr. AL-P methods  The next step in our research will be to calibrate these soil-P tests with plant P uptake and yield responses.

Effect of repeated manure application on potassium, calcium and magnesium in soil and cereal crops in Saskatchewan

2005 ◽  
Vol 85 (3) ◽  
pp. 397-403 ◽  
Author(s):  
P. Qian ◽  
J J Schoenau ◽  
T. King ◽  
M. Japp
Keyword(s):  
Swine Manure ◽  
Field Trials ◽  
Cattle Manure ◽  
High Rate ◽  
Manure Application ◽  
Cereal Straw ◽  
Application Rates ◽  
Increased Risk ◽  
Term Field

Increasing use of animal manures in Saskatchewan requires information on the effect of manure addition on the availability of soil K, Ca and Mg and their concentrations in plant tissue. To address these issues, we examined the effects of repeated application of liquid swine and solid cattle manure at low and high rates on extractable K, Ca and Mg in soils from three different long-term field trials in Saskatchewan, and on plant K, Ca and Mg concentrations in cereal straw grown on the soils. After 5 to 7 yr of manure application, extractable potassium in the soils was significantly increased, while extractable Ca and Mg tended to remain similar, or was decreased with swine manure addition. In the cereal straw, concentrations of K, Ca, and Mg were all increased by repeated swine manure application, such that there was no significant increase in the K/(Ca + Mg) ratio. However, the K/(Ca + Mg) ratio in the cereal straw grown on soil amended with the high rate of cattle manure was increased. These findings suggest that increased risk of tetany potential from manure application would mainly be associated with excessive application rates of cattle manure in these soils, but should be monitored in feeds grown on all manured soils.Key words:Soil extractable K, Ca, Mg and Na; cereal K, Ca and Mg concentrations, K/(Ca + Mg) ratio, tetany potential, urea, swine manure, cattle manure

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