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.

EFFECTS OF LONG-TERM SURFACE APPLICATIONS OF LIMESTONE AND FERTILIZERS TO PERMANENT HAYLAND

1960 ◽  
Vol 40 (1) ◽  
pp. 28-34 ◽  
Author(s):  
L. B. MacLeod ◽  
R. F. Bishop ◽  
L. P. Jackson ◽  
E. T. Goring
Keyword(s):  
Phosphorus Content ◽  
Soil Phosphorus ◽  
Chemical Properties ◽  
Yield Response ◽  
Botanical Composition ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Limestone, nitrogen, phosphorus and potassium, alone and in various combinations, were applied to the surface of permanent hayland during a 27-year period. Both limestone and phosphorus produced marked changes in the chemical properties of the soil. Phosphorus content of the soil where surface applications of this fertilizer were made decreased markedly with depth of sampling. Yield response to phosphorus was greater than to nitrogen or potassium although changes in botanical composition of the sward indicated the value of nitrogen, for grass and of limestone for legumes. Irrespective of the treatment, yields declined with time.

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.

scholarly journals Effects of serpentinite fertilizer on the chemical properties and enzyme activity of young spruce soils

2016 ◽  
Vol 30 (4) ◽  
pp. 401-414 ◽  
Author(s):  
Ewa Błońska ◽  
Kazimierz Januszek ◽  
Stanisław Małek ◽  
Tomasz Wanic
Keyword(s):  
Enzyme Activity ◽  
Chemical Properties ◽  
Molar Ratio ◽  
Tree Roots ◽  
Forest Zone ◽  
Negative Effect ◽  
Phosphorus And Potassium ◽  
One Year ◽  
Nitrogen Phosphorus ◽  
Experimental Plots

AbstractThe experimental plots used in the study were located in the middle forest zone (elevation: 900-950 m a.s.l.) on two nappes of the flysch Carpathians in southern Poland. The aim of this study was to assess the effects of serpentinite in combination with nitrogen, phosphorus, and potassium fertilizers on selected chemical properties of the soil and activity of dehydrogenase and urease in the studied soils. All fertilizer treatments significantly enriched the tested soils in magnesium. The use of serpentinite as a fertilizer reduced the molar ratio of exchangeable calcium to magnesium, which facilitated the uptake of magnesium by tree roots due to competition between calcium and magnesium. After one year of fertilization on the Wisła experimental plot, the pH of the Ofh horizon increased, while the pH of the mineral horizons significantly decreased. Enrichment of serpentinite with nitrogen, phosphorus, and potassium fertilizers stimulated the dehydrogenase activity in the studied organic horizon. The lack of a negative effect of the serpentinite fertilizer on enzyme activity in the spruce stand soil showed that the concentrations of the heavy metals added to the soil were not high enough to be toxic and indicated the feasibility of using this fertilizer in forestry.

scholarly journals Exploring the Yield Response of Paddy (Oryza sativa L.) under Varying Levels of Soil Nitrogen, Phosphorus and Potassium

2020 ◽  
Vol 31 (4) ◽  
pp. 01
Author(s):  
H. P. G. T. N. Kulasinghe ◽  
U. W. A. Vitharana ◽  
R. S. Dharmakeerthi ◽  
D. N. Sirisena ◽  
W. M. U. K. Rathnayake
Keyword(s):  
Oryza Sativa ◽  
Soil Nitrogen ◽  
Yield Response ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

scholarly journals Yield Response of the Puerto Rico and Columnaris Coffee Cultivars in Two Latosols of Puerto Rico, as Affected by Different Levels of Nitrogen, Phosphorus, Potassium, and Lime

1969 ◽  
Vol 48 (3) ◽  
pp. 255-262
Author(s):  
Saulo J. Rodríguez ◽  
R. Bosque-Lugo ◽  
R. Pérez-Pérez ◽  
A. Rodríguez-Cabrera
Keyword(s):  
Puerto Rico ◽  
Plant Nutrients ◽  
Yield Response ◽  
Lateritic Soils ◽  
Nitrogen Levels ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Different Levels

A set of four experiments with increasing levels of the three main plant nutrients and liming were established in two lateritic soils at two locations in the coffee-growing area of Puerto Rico. Two coffee cultivars were used in the experiments. The results obtained can be summarized as follows: 1. Nitrogen levels significantly affected coffee yields of the Puerto Rico cultivar in a Catalina clay at Maricao grown under shade. 2. Phosphorus and potassium did not significantly affect the yields of these coffee cultivars at the two locations. 3. Liming did not significantly affect the yields.

scholarly journals Modeling of rose coco beans using twenty four points optimum second order rotatable design

2017 ◽  
Vol 5 (2) ◽  
pp. 96
Author(s):  
Isaac Tum ◽  
John Mutiso ◽  
Joseph Koske
Keyword(s):  
Response Surface ◽  
Maximum Yield ◽  
Second Order ◽  
Three Dimensions ◽  
Coefficient Of Determination ◽  
Yield Response ◽  
Efficient Production ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Rotatable Design

The response surface methodology (RSM) is a collection of mathematical and statistical techniques useful for the modeling and analysis of problems in which a response of interest is influenced by several variables, and the objective is to optimize the response. The objective of the study was to model the rose coco beans (Phaseolus vulgaris) through an existing A-optimum and D-efficient second order rotatable design of twenty four points in three dimensions in a greenhouse setting using three inorganic fertilizers, namely, nitrogen, phosphorus and potassium. Thus, the objective of the study was accomplished using the calculus optimum value of the free/letter parameter f=1.1072569. This was done by estimating the parameters via least square's techniques, by making available for the yield response of rose coco beans at calculus optimum value design for the first time. The results showed that, the three factors: nitrogen, phosphorus, and potassium contributed significantly on the yield of rose coco beans (p<0.05). In GP3G, the second-order model was adequate for 1% level of significance with p value of 0.0034. The analysis of variance (ANOVA) of response surface for rose coco yield showed that this design was adequate due to satisfactory level of a coefficient of determination, R2, 0.8066 and coefficient variation, CV was 10.30. This study demonstrated the importance of statistical methods in the optimal and efficient production of rose coco beans. We do recommend a randomize screening of all the fertilizer components with which it has influence on rose coco beans be done to ascertain the right initial amount of each fertilizer that could achieve maximum yield than this study realized.

RESPONSE OF SPRING WHEAT AND BARLEY TO NITROGEN, PHOSPHORUS AND POTASSIUM

1971 ◽  
Vol 51 (1) ◽  
pp. 1-11 ◽  
Author(s):  
R. F. BISHOP ◽  
C. R. MacEACHERN
Keyword(s):  
Protein Content ◽  
Spring Wheat ◽  
Plant Tissue ◽  
Crude Protein ◽  
Chemical Properties ◽  
Crude Protein Content ◽  
Grain Yields ◽  
The Third ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Fertilizer trials with spring wheat and barley were conducted at a total of seven and nine locations, respectively, during a three-year period. Treatments consisted of three rates of N, of P and of K in all possible combinations. Although the soils varied in their chemical properties, grain yields increased with the second increment of N in some years and the crude protein content of the grain increased with the third increment in all years. Grain yields were not increased by the second increment of either P or K. Although the effects of increasing rates of N, P and K on the levels of these nutrients in plant tissue were predominantly linear, increases in N levels were of much greater magnitude than increases in either P or K levels. The results indicate that N, P and K at approximately 135, 39 and 37 kg/ha, respectively, should be generally adequate.

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