Visible injury and growth responses of tomato and soybean to combinations of nickel, copper and ozone

1986 ◽  
Vol 27 (3-4) ◽  
pp. 329-340 ◽  
Author(s):  
B. Prokipcak ◽  
D. P. Ormrod
Keyword(s):  
Growth Responses ◽  
Visible Injury ◽  
Nickel Copper

Die-Back Tolerance in Eucalypt Species in Relation to Fertilization and Soil Populations of Phytophthora cinnamomi

1973 ◽  
Vol 21 (1) ◽  
pp. 53 ◽  
Author(s):  
GC Marks ◽  
FY Kassaby ◽  
PC Fagg
Keyword(s):  
Population Density ◽  
Phytophthora Cinnamomi ◽  
Growth Responses ◽  
Coastal Forests ◽  
Visible Injury ◽  
Infection Pattern ◽  
Eucalypt Species ◽  
Soil Temperatures ◽  
High Hazard ◽  
Hazard Rating

The die-back tolerance of 16 fertilized (17/9/7 nitrogen-phosphorus-potassium) and unfertilized eucalypt and two conifer species was tested in the coastal forests of east Gippsland on sites rated as of "high", "moderate", and "low" hazard on the basis of previous damage, internal soil drainage, and infection by P. cinnamomi. Measurements were made of the population density index (PDI) of P. cinnamomi, of soil moisture, and of soil temperature. Supporting greenhouse and laboratory experiments are also reported. The high hazard site showed the most uniform infection and the greatest PDI, the low hazard site the least uniformity in the infection pattern. During the first year's growth, five renantherous eucalypt species showed considerable sensitivity to root rot and die-back; the intensity of the disease and the number of deaths were directly proportional to the hazard rating of the sites. The 11 species of Macrantherae tested were very tolerant to die-back. The disease was aggravated by temporary waterlogging during a 7 day period, but waterlogging did not cause die-back. The disease first appeared in the plots when soil temperatures rose above 15°C. Greenhouse tests showed that P. cinnamomi was most virulent at 22°, and visible injury became evident between 15 and 18°. Fertilizers produced striking growth responses during the first year in both subgenera of eucalypts on the low hazard site, with only minor differences between the two groups. Similar responses were seen only on the Macrantherae on the moderate and high hazard sites. The growth of the surviving renantherous eucalypts was uneven, and fertilizers greatly increased their sensitivity to die-back disease. The response to fertilization in both subgenera was directly related to the disease hazard of the site and the intensity of infection by P. cinnamomi. Differences in response to fertilization between the Macrantherae and the Renantherae were directly proportional to the population density and distribution of P. cinnamomi in the soils. The initial tolerance to die-back of the two conifers, Pinus radiata and P. Elliotii, was similar to that of the most resistant macrantherous eucalypts tested.

Visible injury and growth responses of young cuttings of Populuscanadensis and P. nigra to nitrogen dioxide and sulphur dioxide

1986 ◽  
Vol 16 (6) ◽  
pp. 1289-1292 ◽  
Author(s):  
Andrea M. Eastham ◽  
Douglas P. Ormrod
Keyword(s):  
Sulphur Dioxide ◽  
Leaf Growth ◽  
Stem Growth ◽  
Growth Responses ◽  
Foliar Injury ◽  
Short Term ◽  
Visible Injury ◽  
Growth Effects ◽  
Visible Foliar Injury ◽  
Lombardy Poplar

Carolina poplar (Populuscanadensis Moensch 'Eugenei') and Lombardy poplar (Populusnigra L. 'Italica') were exposed to NO2 and SO2, separately or in combination, for 1 h using concentrations of 0.50 and 1.0 μL•L−1 in separate experiments to determine if foliar injury symptoms can be used as a surrogate for growth effects and if single pollutants have noninteractive effects when mixed. Lombardy poplar was more sensitive than Carolina poplar to exposures to combined SO2 and NO2 at 1.0 μL•L−1 based on visible foliar injury symptoms. In contrast, leaf growth in both species was significantly stimulated by NO2 at 0.50 μL•L−1 and stem growth significantly decreased by NO2 at 1.0 μL•L−1. There was little effect of SO2; there were significant interactions of NO2 and SO2 only in Lombardy poplar exposed to 0.50 μL•L−1. These results suggest that growth effects can not be predicted by foliar injury symptoms and that few significant growth effects are identifiable in short-term studies.

MAGNETIC PROPERTIES OF NICKEL-COPPER AND NICKEL-COBALT ALLOYS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-1937-C8-1938 ◽  
Author(s):  
D. C. Jiles ◽  
T. T. Chang ◽  
D. R. Hougen ◽  
R. Ranjan
Keyword(s):  
Magnetic Properties ◽  
Cobalt Alloys ◽  
Nickel Cobalt ◽  
Nickel Copper

MICROPROPAGATION OF CHICKPEA FROM SHOOT TIP AND NODE SEGMENT

2018 ◽  
Vol 24 (2) ◽  
Author(s):  
J. D. BARSHILE
Keyword(s):  
Shoot Tip ◽  
Root Induction ◽  
Multiple Response ◽  
Ms Medium ◽  
Growth Responses ◽  
Rapid Multiplication ◽  
Micro Propagation ◽  
G 12 ◽  
Better Than

Present investigation was undertaken to standardize technique for in vitro micro-propagation of chickpea( Cicer arietinum ) cultivar Vishwas (Phule G 12). Micropropagation method for chickpea was established and this method enabled much more efficient propagation of plants. The present work was aimed at evolving a protocol for rapid multiplication of chickpea using micropropagation technique. Explants from shoot tip and node segment were cultured on MS medium supplemented with different concentrations of BAP and Kinetin (1.0 to 2.5 mg/l) and their growth responses like shooting were elucidated. The maximum multiple response was observed with 2 mg/l concentration of BAP from both types of explant. The highest number of shoots (12.5 ± 0.3) was achieved on MS medium with 2 mg/l BAP using node segments. The medium supplemented with 2 mg/l of BAP was found better than all other concentrations. Individual shoots were transferred to IBA and IAA (1.0-1.5 mg/l) for root induction. MS medium supplemented with 2 mg/l of IBA proved better for rooting. Rooted plantlets were successfully hardened in greenhouse and established in the pot.

ALTERNATIVE P-FERTILISERS FOR NORTHLAND SOILS

1986 ◽  
pp. 229-232
Author(s):  
P.W. Shannon
Keyword(s):  
Phosphate Rock ◽  
Growth Responses ◽  
Triple Superphosphate ◽  
Rock Phosphates ◽  
Distribution Costs ◽  
Phosphate Retention ◽  
Sechura Phosphate Rock ◽  
Local Product ◽  
Application Frequency ◽  
Chatham Rise Phosphorite

Increasing material, processing, and distribution costs have raised superphosphate prices to a point where many farms cannot support the costs of meeting maintenance phosphate requires men& Alternatives to superphosphate, particularly those that have lower processing costs and contain more P, may offer a solution to the problem provided they are agronomically as effective. Phosphate rock may indeed be such an alternative. Preliminary results from a series of five trials in Northland show that on soils of moderate P fertility, with low phosphate retention (PR) and high pH (5.9.6.0), initial pasture growth responses to rock phosphates are smaller than those from single or triple superphosphate. On one soil of higher PR and lower pH, the differences in yield between the rock-phosphates and the super. phosphates were smaller. Of the rock phosphates tested, Sechura and North Carolina (unground and ungranulated) tended to be more effective than ground and granulated Chatham Rise phosphorite. The effect on production of applying fertilisers once every three years, as opposed to annual applications is being investigated using triple superphosphate and Sechura phosphate rock. After two years, production levels appear largely unaffected by differences in application frequency. A comparison of locally-produced superphosphate with a reference standard showed that both performed similarly, indicating that the local product was of satisfactory quality.

Comparison of Growth Responses of 2-Day-Old Pigs to Streptomycin, Aureomycin, and Crude APF, Alone and in Combination with B12

1952 ◽  
Vol 11 (1) ◽  
pp. 97-102 ◽  
Author(s):  
B. E. Sheffy ◽  
R. H. Grummer ◽  
P. H. Phillips ◽  
G. Bohstedt
Keyword(s):  
Growth Responses
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