Effect of nitrogen, phosphorus and potassium on yields and nutrient levels in onions grown on a sphagnum peat soil

1972 ◽  
Vol 3 (2) ◽  
pp. 97-111 ◽  
Author(s):  
R. F. Bishop ◽  
E. W. Chipman ◽  
C. R. MacEachern
Keyword(s):  
Peat Soil ◽  
Sphagnum Peat ◽  
Nutrient Levels ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

EFFECT OF NITROGEN, PHOSPHORUS AND POTASSIUM ON YIELDS AND NUTRIENT LEVELS IN THE LEAVES OF PROCESSING PEAS

1968 ◽  
Vol 48 (3) ◽  
pp. 225-233 ◽  
Author(s):  
R. F. Bishop ◽  
C. R. MacEachern ◽  
J. S. Leefe ◽  
H. B. Cannon
Keyword(s):  
Chemical Properties ◽  
Yield Response ◽  
Nutrient Levels ◽  
Consistent Increase ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Leaf N

Fertilizer trials with processing peas were conducted at 15 locations during a 4-year period. Although the soils varied in their chemical properties, there was no general or consistent yield response with increasing rates of N, P or K. There was, however, a consistent increase in leaf N with the higher rates of N and in leaf K with all rates of K. Increasing rates of K were accompanied by decreasing leaf levels of Ca and Mg. The results indicate that N, P and K applied at approximately 25, 50 and 25 kg/ha respectively should be generally adequate.

OPTIMUM LEAF LEVELS OF NITROGEN, PHOSPHORUS AND POTASSIUM IN SWEET CORN AND SNAP BEANS

1962 ◽  
Vol 42 (2) ◽  
pp. 238-246 ◽  
Author(s):  
D. C. MacKay ◽  
J. S. Leefe
Keyword(s):  
Sweet Corn ◽  
Polynomial Regression ◽  
Crop Yields ◽  
Nutrient Levels ◽  
Regression Curves ◽  
Snap Beans ◽  
Flower Stage ◽  
Phosphorus And Potassium ◽  
Moisture Conditions ◽  
Nitrogen Phosphorus

Optimum nutrient levels were derived by comparing the polynomial regression curves relating leaf analyses and crop yields with rates of applied nitrogen, phosphorus and potassium. Uppermost mature leaves were used for analysis, and samples were collected at specific physiological stages of development.In two seasons the optimum levels in sweet corn differed by 7, 25 and 9 per cent, and in snap beans by 12, 29 and 11 per cent for nitrogen, phosphorus and potassium respectively. A low moisture supply was generally associated with lower optimum levels for all three nutrients, but "excess" moisture had only slight effects on these levels for any nutrient.Optimum nutrient levels which were calculated from ample moisture conditions were, for the tassel-emerging stage of sweet corn, 3.5, 0.38 and 2.5 per cent, and at the early flower stage of snap beans 5.1, 0.40 and 2.0 per cent for nitrogen, phosphorus and potassium, respectively. At the sixth to seventh leaf stage of sweet corn optimum levels were higher for nitrogen and potassium but lower for phosphorus (3.8, 3.1 and 0.34 per cent respectively), and at the pollen-shedding stage the levels were only slightly different than at tassel-emergence.

EFFECT OF NITROGEN, PHOSPHORUS AND POTASSIUM ON YIELDS AND NUTRIENT LEVELS IN LAMINAE AND PETIOLES OF PICKLING CUCUMBERS

1969 ◽  
Vol 49 (3) ◽  
pp. 297-304 ◽  
Author(s):  
R. F. Bishop ◽  
E. W. Chipman ◽  
C. R. MacEachern
Keyword(s):  
Yield Response ◽  
Relative Importance ◽  
Nutrient Levels ◽  
Pickling Cucumbers ◽  
Phosphorus And Potassium ◽  
Constant Yield ◽  
Nitrogen Phosphorus

Fertilizer trials with pickling cucumbers were conducted at four locations during a 3-year period. The effect of applied fertilizers on trends in the nutrient percentages in laminae and petioles was generally similar at all locations, although percentages varied with treatments and locations. Furthermore, when the percentage of a nutrient in the lamina was expressed as a ratio of the percentage in the petiole, values for any one nutrient were relatively constant. Yield response to applied fertilizers showed P to be of greater relative importance than N or K and indicated that N and P at approximately 50 and 100 kg/ha, respectively, should be generally adequate. On the basis of other studies elsewhere, K at 50 kg/ha is recommended.

Effects of Water-Nitrogen Interaction on Absorption, Translocation and Distribution of Nitrogen, Phosphorus, and Potassium in Rice

2010 ◽  
Vol 36 (4) ◽  
pp. 655-664 ◽  
Author(s):  
Yong-Jian SUN ◽  
Yuan-Yuan SUN ◽  
Xu-Yi LI ◽  
Rong-Ping ZHANG ◽  
Xiang GUO ◽  
...  
Keyword(s):  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus
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