BORON NUTRITION OF BROCCOLI, BRUSSELS SPROUTS, AND CAULIFLOWER GROWN ON PRINCE EDWARD ISLAND SOILS

1973 ◽  
Vol 53 (3) ◽  
pp. 275-279 ◽  
Author(s):  
UMESH C. GUPTA ◽  
J. A. CUTCLIFFE
Keyword(s):  
Brassica Oleracea ◽  
Prince Edward Island ◽  
Growing Season ◽  
Water Soluble ◽  
Hot Water ◽  
Optimum Growth ◽  
Brussels Sprouts ◽  
Deficiency Symptoms ◽  
Brassica Oleracea L

Broccoli (Brassica oleracea L. ssp. italica Plenck., cult Waltham 29), Brussels sprouts (Brassica oleracea L. ssp. gemmifera, cult Jade Cross), and cauliflower (Brassica oleracea L. ssp. botrytis, cult Snowball Y) were grown at four locations on Prince Edward Island with five levels of applied B at each location. The levels of applied B were: 0, 0.56, 1.12, 2.24, and 4.48 kg B/ha. No B deficiency symptoms, with the exception of hollow stem in cauliflower and broccoli, were noted. The incidence of hollow stem in these crops was not affected by applied B. The B concentration of tissues of all three crops was generally lower late in the growing season than earlier. Boron levels in the first tissue samplings were 13–70, 13–101, and 8–97 ppm in broccoli, Brussels sprouts, and cauliflower, respectively, and were found to be in the sufficiency range. A hot-water-soluble B content of 0.34–0.49 ppm in soil was sufficient for optimum growth of the crops. No B toxicity was observed even when the rate of applied B was 4.48 kg/ha.

scholarly journals BORON AND ZINC NUTRITION OF TOBACCO GROWN IN PRINCE EDWARD ISLAND

1986 ◽  
Vol 66 (1) ◽  
pp. 67-71 ◽  
Author(s):  
UMESH C. GUPTA ◽  
W. J. ARSENAULT
Keyword(s):  
Prince Edward Island ◽  
Field Experiments ◽  
Water Soluble ◽  
Hot Water ◽  
Boron Toxicity ◽  
Zn Deficiency ◽  
Deficiency Symptoms ◽  
Nicotiana Tabacum L ◽  
Zinc Nutrition ◽  
Grade Index

Field experiments were conducted at various locations in Prince Edward Island to determine the effect of applied Zn and B on tobacco (Nicotiana tabacum L.) yield, grade index, and tissue B and Zn concentrations. Addition of B at 1.1 kg ha−1 did not increase tobacco yield. Rates of B at 8.8 kg ha−1 and higher proved toxic and resulted in yield reductions. At these higher rates there was more than 3 μg g−1 hot-water-soluble (HWS) B in the soil and 113–169 μg B g−1 in the various primings. Tissue B levels as low as 31 μg g−1 in the third priming and the HWS B as low as 0.3 μg g−1 soil did not give B deficiency symptoms. Additions of Zn tended to increase yields but not significantly. Tissue Zn levels as low as 17 μg g−1 in the 3rd priming did not result in Zn deficiency symptoms. No yield reductions occurred when the tissue Zn levels were as high as 115 in the first and 57 μg g−1 in the fourth priming. The grade index of tobacco was not affected by Zn applications but B applications of 8.8 kg ha−1 significantly decreased the index. Tissue Zn and B were higher in the 1st and 2nd than in the 3rd, 4th, or 5th primings. Key words: Tobacco yields, tissue boron, tissue zinc, boron toxicity

The effect of aerated hydration on DNA synthesis in embryos of Brassica oleracea L.

1993 ◽  
Vol 3 (3) ◽  
pp. 195-199 ◽  
Author(s):  
J. M. Thornton ◽  
A. R. S. Collins ◽  
A. A. Powell
Keyword(s):  
Dna Damage ◽  
Dna Replication ◽  
Dna Synthesis ◽  
Brassica Oleracea ◽  
Thymidine Incorporation ◽  
Recovery Process ◽  
Time Difference ◽  
Brussels Sprouts ◽  
Brassica Oleracea L

AbstractAgeing causes a delay in the onset of DNA replication in seeds. Aerated hydration for 8 h, a treatment to invigorate seeds, resulted in a reduction of about 12 h in the time difference in the onset of DNA synthesis between unaged and aged embryos of brassica seed. This effect is consistent with a recovery process occurring during aerated hydration of the seed involving the repair of accumulated DNA damage. The occurrence of hydroxyurea-resistant 3H-thymidine incorporation in aged Brussels sprouts embryos during the period 16–32 h from the start of hydration supports this interpretation.

EFFECTS OF APPLIED AND RESIDUAL BORON ON THE NUTRITION OF CABBAGE AND FIELD BEANS

1984 ◽  
Vol 64 (4) ◽  
pp. 571-576 ◽  
Author(s):  
UMESH C. GUPTA ◽  
J. A. CUTCLIFFE
Keyword(s):  
Prince Edward Island ◽  
Field Experiments ◽  
Leaf Tissue ◽  
Water Soluble ◽  
Hot Water ◽  
Boron Toxicity ◽  
First Year ◽  
Application Rates ◽  
Seed Yields ◽  
Field Beans

Field experiments were conducted at four locations in Prince Edward Island to determine the effect of applied B on leaf tissue B and yields of beans (Phaseolus vulgaris L.) and cabbage (Brassica oleracea var. capitata L.) in the year of application of B and again the following year. Application rates of 8.8 kg B∙ha−1 reduced bean seed yields at all locations and the 4.4-kg B∙ha−1 rate reduced yields at two locations in the first year. Leaf tissue B levels > 109 μg∙g−1 are clearly toxic for beans and seriously reduced bean yields. Furthermore, the yield and visual symptom data strongly suggest that tissue B levels even as low as 60 μg∙g−1 are toxic for this crop. No significant reductions in bean yields were noted in the second year crop, even at the 8.8 kg B∙ha−1 rate. Rates of up to 8.8 kg B∙ha−1 did not cause any reduction in cabbage yield even during the year of application. Leaf tissue B concentrations as high as 71–132 μg∙g−1 were not related to any B toxicity in cabbge. Added B did not increase yield of either beans or cabbage. Even though leaf tissue B levels as low as 16 μg∙g−1 in cabbage and 26 μg∙g−1 in beans occurred, no B deficiency was found. After the first and second years of beans the hot-water-soluble B in the soil ranged from 1.4 to 1.9 and from 0.8 to 1.2 μg∙g−1, respectively, where B had been applied at 8.8 kg∙ha−1. Key words: Cabbage, beans, boron toxicity, tissue boron, yields

AVAILABLE SOIL POTASSIUM AND FERTILIZER POTASSIUM FOR BRUSSELS SPROUTS

1971 ◽  
Vol 51 (3) ◽  
pp. 197-200 ◽  
Author(s):  
D. C. MUNRO ◽  
J. A. CUTCLIFFE
Keyword(s):  
Brassica Oleracea ◽  
Prince Edward Island ◽  
Ammonium Acetate ◽  
Potassium Concentration ◽  
Soil Analysis ◽  
Leaf Tissue ◽  
Tissue Analysis ◽  
Potassium Fertilizer ◽  
Brussels Sprouts ◽  
Soil Potassium

Brussels sprouts (Brassica oleracea var. gemmifera DC., Jade Cross) require no potassium fertilizer on Prince Edward Island soils if exchangeable soil K as determined by neutral 1 N ammonium acetate exceeds 100 ppm. Below 75 ppm exchangeable soil K, 186 kg K/ha must be applied for maximum yields. Potassium treatments increased yields at only three of 12 locations studied. Leaf tissue potassium concentration was significantly increased at all locations by the fertilizer treatments. Neutral 1 N ammonium acetate for determining exchangeable K was the best soil analysis extract among those tested for measuring available potassium. Tissue analysis gave no information beyond soil analysis for predicting potassium fertilizer requirements on any soil studied.

SOME FACTORS AFFECTING THE DETERMINATION OF HOT-WATER-SOLUBLE BORON FROM PODZOL SOILS USING AZOMETHINE-H

1979 ◽  
Vol 59 (3) ◽  
pp. 241-247 ◽  
Author(s):  
UMESH C. GUPTA
Keyword(s):  
Prince Edward Island ◽  
Sandy Loam ◽  
Water Soluble ◽  
Hot Water ◽  
Colorimetric Determination ◽  
Factors Affecting ◽  
Water Extracts ◽  
Percent Recovery

A study was conducted on some factors affecting the colorimetric determination of B using the azomethine-H reagent on soils from Prince Edward Island. Two fine sandy loam soils (A and B) were used for the main study and additional soil samples varying in organic matter (OM) were used to assess the role of OM. Soils containing less than 3.0% OM and 3.1–4.1% OM required 0.4 g and 0.8 g charcoal per 25 g soil, respectively, to produce clear hot-water extracts. Quantities of greater than 0.8 g charcoal were necessary to produce clear extracts from soils containing more than 4.1% OM. Colored hot-water extracts of soil resulted in higher absorbance than those hot-water extracts treated with charcoal as measured at 430 mμ. Additions of 0.8 and 1.6 g charcoal or greater to the soils (A and B) resulted in considerably lower recoveries of B as noted by comparing the absorbance obtained using 0.4 and 0.8 g, respectively. Storage of azomethine-H up to 7 days did not affect the absorbance of the B-azomethine-H complex. One hour after the addition of azomethine-H, a maximum absorbance was found which persisted for up to 4 h. The percent recovery of B added to the two soils was about 10–12% less using azomethine-H as compared to those obtained using the carmine method. However, the mean hot-water-soluble B contents of 10 soils as measured using the carmine and azomethine-H reagents were 0.70 and 0.66 ppm. Pure B solutions when boiled with charcoal resulted in losses of B added. Such losses of B increased with increasing rates of charcoal.

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