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.

EFFECTS OF ADDED NITROGEN, PHOSPHORUS, AND POTASSIUM ON LEAF TISSUE BORON CONCENTRATION OF THREE VEGETABLE CROPS

1980 ◽  
Vol 60 (2) ◽  
pp. 571-576 ◽  
Author(s):  
J. A. CUTCLIFFE ◽  
UMESH C. GUPTA
Keyword(s):  
Brassica Oleracea ◽  
Prince Edward Island ◽  
Boron Concentration ◽  
Leaf Tissue ◽  
Vegetable Crops ◽  
Brussels Sprouts ◽  
Pisum Sativum L ◽  
Leaf Tissues ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

The effects of various rates of nitrogen, phosphorus, and potassium on the boron concentration of leaf tissue of cauliflower (Brassica oleracea var. botrytis L. ’Snowball Y’), Brussels sprouts (Brassica oleracea var. gemmifera Zenker ’Jade Cross’) and peas (Pisum sativum L. ’Dark Skin Perfection’) were investigated at several locations in Prince Edward Island. Except for N on cauliflower, B concentrations of leaf tissues of these crops were not greatly affected by the N, P, or K treatments. Applied N increased the B concentration of cauliflower leaf tissue at eight of the nine locations investigated.

RELEASE OF NON-EXCHANGEABLE SOIL POTASSIUM BY RESIN-EQUILIBRATION AND ITS SIGNIFICANCE FOR CROP GROWTH

1962 ◽  
Vol 42 (2) ◽  
pp. 266-272 ◽  
Author(s):  
T. E. Barber ◽  
B. C. Matthews
Keyword(s):  
Linear Regression ◽  
Ammonium Acetate ◽  
Cation Exchange Resin ◽  
Yield Response ◽  
Exchangeable Potassium ◽  
Quadratic Regression ◽  
Potassium Fertilizer ◽  
Crop Response ◽  
Soil Potassium ◽  
The Difference

The non-exchangeable potassium released by soil after equilibration with cation-exchange resin was determined by extraction of the mixture with neutral ammonium acetate at room temperature and compared with a similar extraction in the absence of resin. The difference obtained following a 2-day equilibration period was called moderately-available potassium.Simple linear regression of yield on exchangeable potassium or exchangeable plus moderately-available potassium accounted for only 16 and 27 per cent respectively of the variability in yield response of corn, wheat, oats and potatoes to potassium fertilizer in the field. Multiple linear regression of yield on exchangeable and moderately-available potassium accounted for an average of 37 per cent of the variation in crop response; but a multiple quadratic regression of Log (100-per cent yield) on exchangeable and moderately-available potassium accounted for an average of 56 per cent of the variability in Log (100-per cent yield). Multiple quadratic regression of absolute yield or per cent yield on exchangeable and moderately-available potassium accounted for 46 and 50 per cent, respectively, of the variability in crop response to potassium fertilizer.

scholarly journals Effect of potassium fertilization on its available and fixed content in vineyard soil

2002 ◽  
Vol 47 (1) ◽  
pp. 37-44 ◽  
Author(s):  
V. Licina ◽  
N. Markovic
Keyword(s):  
Ammonium Acetate ◽  
Extraction Methods ◽  
Fertilizer Application ◽  
First Year ◽  
Potassium Fertilizer ◽  
Brown Forest Soil ◽  
Soil Layers ◽  
Soil Potassium ◽  
K Fertilizer

The experiment was conducted on brown forest soil in the vineyard with Sauvignon blanc variety on Kober 5BB rootstock. During a thre- year experiment (1994-1996), potassium fertilizer was added in a dose of 0 kg K2O/ha, 50 kg K2O/ha, 100 kg K2O/ha, 150 K2O/ha respectively. After the determination of soil potassium content (1870-1920 mg K2O/100 g), its available form was monitored by using two different extraction methods (AL method and 1N ammonium-acetate extraction). The amount of extracted available K was not significant between the used methods, while the effect of fertilization was visible only at 150 kg/ha potassium rate during the first year in soil layers (30-60 cm, 60-90 cm). Also, another examined soil K fraction (fixed K+) was not affected by K fertilizer application.

EFFECTS OF LIME AND GYPSUM ON YIELDS AND NUTRITION OF TWO CULTIVARS OF BRUSSELS SPROUTS

1988 ◽  
Vol 68 (3) ◽  
pp. 611-615 ◽  
Author(s):  
J. A. CUTCLIFFE
Keyword(s):  
Key Words ◽  
Prince Edward Island ◽  
Nutrient Concentration ◽  
Field Experiments ◽  
Leaf Tissue ◽  
Dolomitic Limestone ◽  
Brussels Sprouts ◽  
Initial Ph ◽  
Internal Browning ◽  
Tissue Nutrient Concentration

Field experiments were carried out at different locations in Prince Edward Island each year for 3 consecutive years to determine the effects of calcific limestone, dolomitic limestone, and gypsum on yields and nutrition of two cultivars of Brussels sprouts (Brassica oleracea var. gemmifera). The soils at the sites selected had initial pH levels of 4.9–5.7. Preplant, broadcast applications of gypsum at 5.5 t ha−1 resulted in yield increases of about 30% at all locations. Analysis of leaf tissue collected when the sprouts began to form indicated that Ca, Mg, Mn and Zn concentrations of approximately 1.4–2.6%, 0.25–0.32%, 88–274 μg g−1 and 26–35 μg g−1, respectively, are within the sufficiency range. The incidence of internal browning was not affected by either the lime or gypsum treatments at the two locations where this disorder occurred. Key words: Lime, gypsum, yield, leaf tissue nutrient concentration, internal browning, Brussels sprouts

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.

TOLERANCE OF BRUSSELS SPROUTS TO HIGH BORON LEVELS

1987 ◽  
Vol 67 (1) ◽  
pp. 205-207 ◽  
Author(s):  
UMESH C. GUPTA ◽  
J. A. CUTCLIFFE ◽  
RENALD CORMIER
Keyword(s):  
Key Words ◽  
Brassica Oleracea ◽  
Leaf Tissue ◽  
Field Studies ◽  
Eastern Canada ◽  
Brussels Sprouts ◽  
Application Rates ◽  
High Boron ◽  
Brassica Oleracea L

Boron application rates as high as 8 and 16 kg ha−1 were not toxic to Brussels sprouts (Brassica oleracea L. ssp. gemmifera). These rates resulted in leaf tissue B levels of 123 and 161 μg g−1 and of 7.6 and 9.1 μg HWS B g−1 soil, respectively. Rates of 8–16 kg B ha−1 would, however, be seriously toxic to many crops. It is therefore strongly recommended that rates of B applied to Brussels sprouts should not exceed 2 kg ha−1. Such B applications should eliminate B deficiency in most crops and would not pose a threat of B toxicity to crops grown in the following year. Key words: Eastern Canada, Brussels sprouts yields, field studies, boron

Calibration of soil and leaf analyses for the control of sugar-cane fertilization rates in Southern Queensland

1965 ◽  
Vol 16 (3) ◽  
pp. 367 ◽  
Author(s):  
RA Yates
Keyword(s):  
Sugar Cane ◽  
Leaf Tissue ◽  
Phosphate Fertilizer ◽  
Analysis Data ◽  
Potassium Fertilizer ◽  
Leaf Analysis ◽  
Soil Potassium ◽  
Soil Calcium ◽  
Calcium Magnesium ◽  
Sampling Times

Data from a large series of trials over a number of different soil types have been studied to determine the value of leaf and soil analyses for controlling the fertilization of sugar-cane. Statistical data on the correlations obtained are presented. The response to nitrogen fertilizer could not be assessed from leaf analysis data, but the level of mineral nitrogen in incubated topsoil was well correlated with the amount of fertilizer required. The response to phosphate fertilizer could be assessed through soil, leaf, or juice phosphate analyses, the leaf analysis being the most accurate, with a critical value of 0.18% phosphorus in the dry lamina of the top visible dewlap leaf. The reliability of this assessment depended on the soil calcium/magnesium ratio being normal, and there being no trace element interaction. The response to potassium fertilizer was only poorly correlated with soil potassium. The correlation with leaf potassium was good, and was modified by the response of leaf potassium to potassium fertilizer and by the level of phosphate in the leaf. At 0.174% phosphorus, the critical level for leaf potassium was 1.69%; this fell to 1.44% at 0.22% phosphorus. Assessment of critical values in leaf tissue was complicated by difficulties in selecting sampling times due to very variable growth rates, and by associated variations in leaf analyses. The levels of calcium and magnesium have not been found to affect the critical levels of potassium.

scholarly journals Nitrogen Uptake by Table Beet—Validation of a Model

2002 ◽  
Vol 127 (6) ◽  
pp. 1013-1017 ◽  
Author(s):  
Carmen Feller ◽  
Matthias Fink
Keyword(s):  
Brassica Oleracea ◽  
N Uptake ◽  
Model Parameters ◽  
Potential Range ◽  
Vegetable Crops ◽  
Fresh Matter ◽  
Total N ◽  
Brussels Sprouts ◽  
Sowing Dates ◽  
Plant Densities

To reduce nitrogen (N) losses from vegetable fields, fertilizer recommendations should be adjusted according to the large range in yield and thus in N uptake of vegetable crops. Therefore, a model was used to predict total N uptake based on expected yield. The model has been validated successfully in a series of studies for Brussels sprouts (Brassica oleracea L. var. gemmifera), white cabbage (Brassica oleracea L. var. capitata) and kohlrabi (Brassica oleracea L. var. gongylodes). The objective of this study was to validate the model for table beet (Beta vulgaris L. var. conditiva), a crop with a considerable variability in N uptake, which is caused by a large potential range of selecting sowing dates, plant densities and cultivars. Field experiments were carried out over two years. Fifty-five combinations of N fertilizer levels, plant densities, cultivars and sowing dates were tested. Plants were sampled at 2- or 3-week intervals, and fresh matter, dry matter and N content of leaves and roots were measured. Crop specific model parameters for table beets were determined from independent data. The model wverestimated N uptake for N-limiting conditions, but for optimally fertilized table beets measured and estimated N uptake showed a close correlation (R2 = 0.93) when total yield was used as an input parameter for the model. Although the error of estimation (35 kg·ha-1) was considerable, studies with other vegetable crops using the model found the error even higher if other tools, such as look-up tables, were used for predicting N uptake.

scholarly journals Forms and Dynamics of Soil Potassium in Acid Soil in the Wolaita Zone of Southern Ethiopia

2021 ◽  
Author(s):  
Mesfin Kassa ◽  
Wassie Haile ◽  
fassile kebede
Keyword(s):  
Land Use ◽  
Ammonium Acetate ◽  
Water Soluble ◽  
Land Use Type ◽  
Exchangeable Potassium ◽  
Management Options ◽  
Grazing Land ◽  
Soil Potassium ◽  
Crop Land ◽  
Land Use Types

Quantity-intensity characteristics are among conventional approaches for studying potassium dynamics and its availability; this was assessed to determine availability in four districts: namely, Sodo Zuria, Damot Gale, Damot Sore, and Boloso Sore at three different land use type viz., enset-coffee, crop land, and grazing land. There was water soluble, ammonium acetate, nitric acid extractable potassium, exchangeable potassium, and non-exchangeable potassium studied in soil samples, which were collected from 0-20 cm depth of each land type. The study revealed that water soluble and ammonium acetate extractable potassium concentrations ranged from 0.04 to 0.42 cmolKg-1 soils enset-coffee and grazing land use types, respectively. The study showed that exchangeable potassium constituted the highest proportion of available potassium, while the proportion of water soluble potassium was found to be the lowest. In this study, non-exchangeable potassium concentrations varied from 0.10 to 0.04cmolKg-1soils for enset-coffee, and crop and grazing land use type. Furthermore, available potassium and exchangeable potassium concentrations were positively correlated with OC(r=0.95***), cation exchange capacity, and sand and clay(r=0.98***). In addition, the K dynamics as impacted by land use types found that the highest change in exchangeable potassium (0.31cmolkg-1soils) and potential buffering capacity (1.79cmolkg-1soils) were noted in crop land use types, whereas the lowest change(1.26cmolkg-1 soils) was observed in the enset-coffee system, The varying properties, potassium status, dynamic and land use type of soils identified in the study areas provided adequate information to design soil potassium management options and further research about the soil in each site. Therefore, application of site specific soil fertility management practices and research can improve soil potassium status and quantity intensity parameters to sustain crop productive soils.

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