scholarly journals Preliminary Nitrogen, Phosphorus, and Potassium DRIS Norms for Pineapple

HortScience ◽  
1990 ◽  
Vol 25 (6) ◽  
pp. 652-655 ◽  
Author(s):  
D.E. Angeles ◽  
M.E. Sumner ◽  
N.W. Barbour
Keyword(s):  
Nutrient Balance ◽  
Integrated System ◽  
Critical Values ◽  
Ananas Comosus ◽  
Data Sets ◽  
Nutrient Deficiencies ◽  
Factorial Experiments ◽  
Phosphorus And Potassium ◽  
Yield Responses ◽  
Nitrogen Phosphorus

Diagnosis and Recommendation Integrated System (DRIS) norms for pineapple [Ananas comosus (L.) Merr.] were developed from 1185 observations of previously published leaf nutrient composition and yield. The data were divided into high-yielding (> 60 t·ha-1, 650 observations) and low-yielding (< 60 t·ha-1, 535 observations) sub-populations and the norms derived by standard DRIS techniques. The validity of the norms was tested using independently published sets of data from factorial experiments in which yield responses to N, P, and K had been obtained. In the case of most data sets, the new DRIS norms were able to make correct diagnoses where critical values failed to make any diagnoses for N, P, and K. Thus, the DRIS approach revealed nutrient deficiencies in the range normally considered to be sufficient. Increased precision is found in the evaluation of nutrient balance in the DRIS approach, which is ignored in the case of critical values.

The response of pastures in Northern Ireland to N, P and K fertilizers and to animal slurries: I. Effects on dry-matter yield

1973 ◽  
Vol 81 (3) ◽  
pp. 411-417 ◽  
Author(s):  
S. N. Adams
Keyword(s):  
Northern Ireland ◽  
Dry Matter ◽  
Nutrient Balance ◽  
Farming System ◽  
Dry Matter Yield ◽  
Factorial Experiments ◽  
Positive Interaction ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Pasture Yield

SUMMARYSixteen factorial experiments made from 1969 to 1971 on Northern Ireland pastures measured effects on yield of 0, 180 or 360 kg of N, 0, 30 or 60 kg of P and 0, 150 or 300 kg of K/ha/year both with and without 138,000 1 of slurry/ha.Without slurry, pasture yield was almost always substantially increased by nitrogen, slightly by potassium and hardly at all by phosphorus. There was a slight positive interaction between nitrogen and potassium, but no other interactions. Response to nitrogen was not linear and therefore was lower than has been obtained in many British trials.Slurry sharply reduced response to nitrogen and virtually eliminated response to phosphorus and potassium. The NH4-nitrogen content of slurry gave an adequate measure of its effect on pasture yield. The nitrogen, phosphorus and potassium contents of the most concentrated slurries were 15, 29 and 36 times respectively those of the most dilute batches. Hence considerable imprecision is brought into a fertilizer programme when slurry is applied.As manuring on individual fields can never be precise, the fertilizer phosphorus and potassium needed for grassland is best assessed by considering the farm as a whole. A nutrient balance can show if the farming system is gaining or losing phosphorus and potassium. The amounts of fertilizer phosphorus and potassium needed are those which cover any deficits on the farm as a whole.

scholarly journals BALANÇO DA FERTIRRIGAÇÃO EM MELOEIRO “PELE-DE-SAPO”

Irriga ◽  
2007 ◽  
Vol 12 (1) ◽  
pp. 63-72 ◽  
Author(s):  
Manoel Januário da Silva Júnior ◽  
José Francismar de Medeiros ◽  
Fábio Henrique Tavares de Oliveira ◽  
Indalécio Dutra
Keyword(s):  
Soil Nitrogen ◽  
Cucumis Melo ◽  
Nutrient Balance ◽  
Rio Grande ◽  
Critical Periods ◽  
Management Efficiency ◽  
Crop Cycle ◽  
Phosphorus And Potassium ◽  
Cucumis Melo L ◽  
Nitrogen Phosphorus

BALANÇO DA FERTIRRIGAÇÃO EM MELOEIRO “PELE-DE-SAPO”  Manoel Januário da Silva Júnior1; José Francismar de Medeiros2; Fábio Henrique Tavares de Oliveira3; Indalécio Dutra21Departamento de Engenharia Rural, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, SP, [email protected] de Ciências Ambientais, Universidade Federal Rural do Semi-Árido, Mossoró 3Departamento de Solos e Engenharia Rural, CCA, Universidade Federal da Paraiba, Areia, PB,  1 RESUMO O melão produzido no estado do Rio Grande do Norte é cultivado sob irrigação, sendo uma das culturas em que mais se pratica a fertirrigação. A fertirrigação tem se mostrado como a técnica mais adequada para parcelar a dose dos nutrientes em várias aplicações durante o ciclo da cultura. Entretanto, ainda não se conhece a eficiência dessa técnica. O objetivo deste trabalho foi avaliar o balanço dos nutrientes no sistema solo-planta, aplicados através da fertirrigação identificando os períodos críticos para o manejo da fertirrigação. Os tratamentos foram: doses de nitrogênio (83, 119 e 156 kgN ha-1) e doses de potássio (190, 271 e 352 kg K2O ha-1) aplicadas via fertirrigação e o experimento foi montado em blocos aleatorizados com três repetições. Coletou-se solo e planta aos 22, 33, 43, 54 e 69 dias após a semeadura e determinaram-se os teores de N, P e K na planta e no solo. O aumento da dose de nitrogênio provocou aumento das perdas desse nutriente e, quando se aumentou a dose de potássio houve acúmulo no solo. As maiores perdas de nitrogênio, fósforo e potássio ocorreram no período de maior exigência nutricional da cultura. UNITERMOS: Cucumis melo L., manejo da fertirrigação, índices de eficiência  SILVA JÚNIOR, M. J. da; MEDEIROS, J. F. de; OLIVEIRA, F. H. T. de; DUTRA, I. BALANCE OF FERTIGATION IN “PELE-DE-SAPO” MELON PLANTS  2 ABSTRACT Melon production in Rio Grandedo Norte state (Brazil) is grown under irrigation and it is one of the crops where fertigation is more used. The importance of fertigation technique is attributed to nutrient dose fractioning into several applications during crop cycle. Therefore, the efficiency of this technique is not known yet. This study aimed to evaluate nutrient balance applied through fertigation in a soil-plant system to identify critical periods for fertigation management. The treatments consisted of nitrogen doses (83, 119, and 156 kgN ha-1) and potassium doses (190, 271, and 352 kg K2O ha-1) applied via fertigation and the experimental design was randomized blocks with three replications. Soil and plants were sampled at 22, 33, 43, 54 and 69 days after seeding to determine plant and soil contents of N, P and K. The increase in nitrogen dose raised soil nitrogen losses, but the increase in potassium dose caused accumulation in the soil. Higher losses of nitrogen, phosphorus and potassium occurred in the crop higher nutritional demand stage. KEYWORDS: Cucumis melo L., fertigation management, efficiency indices

scholarly journals Pig slurry characteristics, nutrient balance and biogas production as affected by separation and acidification

2014 ◽  
Vol 153 (1) ◽  
pp. 177-191 ◽  
Author(s):  
S. G. SOMMER ◽  
M. HJORTH ◽  
J. J. LEAHY ◽  
K. ZHU ◽  
W. CHRISTEL ◽  
...  
Keyword(s):  
Biogas Production ◽  
Nutrient Balance ◽  
Heavy Metal Accumulation ◽  
Field Application ◽  
Fertilizer Efficiency ◽  
Pig Slurry ◽  
Wheat Field ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Npk Fertilization

SUMMARYAnimal slurry is separated in order to avoid excessive nitrogen, phosphorus and potassium (NPK) fertilization of crops in the field. To enhance fertilizer efficiency further, slurry and its separation products may be acidified, for instance in animal houses. The current study quantified the effects of these treatments, both individually and in combination, on fertilizer efficiency, energy production and heavy metal accumulation as a result of manure management. Acidification increased the availability of N to plants in the manure applied, and provided a better match between plant-available NPK in the manure and separation fraction applied to fields and crop need. Total biogas production was not affected by separation, whereas acidification reduced biogas production because the process was inhibited by a low pH and a high sulphur concentration. The amount of copper applied per hectare in the liquid manure to the wheat field was lower than the amount taken up and more zink and copper was applied in the solid fraction to maize field than taken up. The transportation and field application of solids and liquids did not increase management costs when compared to the transportation of slurry alone, but the investment and running costs of separators and manure acidification increased overall management costs.

scholarly journals Evaluating Plant Potassium Status

2020 ◽  
pp. 219-261
Author(s):  
T. Scott Murrell ◽  
Dharma Pitchay
Keyword(s):  
Growth And Development ◽  
Nutrient Balance ◽  
Leaf Tissue ◽  
Large Data ◽  
Plant Performance ◽  
Data Sets ◽  
Nutrient Deficiencies ◽  
Correlation Studies ◽  
Remote Sensing Technique ◽  
Crop Growth And Development

AbstractSeveral methods exist for evaluating plant nutritional status. Looking for visual deficiency symptoms is perhaps the simplest approach, but once symptoms appear, crop performance has already been compromised. Several other techniques have been developed. All of them require correlation studies to provide plant performance interpretations. Reflectance is a remote sensing technique that detects changes in light energy reflected by plant tissue. It has proven successful in detecting nutrient deficiencies but does not yet have the ability to discriminate among more than one deficiency. Chemical assays of leaf tissue, known as tissue tests, require destructive sampling but are the standard against which other assessments are compared. Sufficiency ranges provide concentrations of each nutrient that are considered adequate for crop growth and development. They consider nutrients in isolation. Other approaches have been developed to consider how the concentration of one nutrient in tissue impacts the concentrations of other nutrients. These approaches strive to develop guidelines for maintaining nutrient balance within the plant. All approaches require large data sets for interpretation.

scholarly journals Development and Testing of Preliminary Foliar DRIS Norms for Onions

HortScience ◽  
1994 ◽  
Vol 29 (12) ◽  
pp. 1501-1504 ◽  
Author(s):  
Jordan O'N Caldwell ◽  
Malcolm E. Sumner ◽  
Charles S. Vavrina
Keyword(s):  
Plant Density ◽  
Nutrient Balance ◽  
Data Bank ◽  
Analysis Data ◽  
Integrated System ◽  
Published Data ◽  
Plant Analysis ◽  
Limiting Nutrients ◽  
Significant Yield ◽  
Yield Responses

The Diagnosis and Recommendation Integrated System (DRIS) was developed to incorporate the importance of nutrient balance into plant analysis. Yield and plant analysis data from five fertilizer trials conducted in the field during 2 years, using `Granex 33' onions (Allium cepa L.), were entered into a data bank. The trials consisting of a N4 × P4 × K4 × S4, a N4 × P4 × K4 × plant density4, two N4 × P4 × K4, and a 4N × 6S factorial were conducted on sandy Ultisols in Georgia. Significant yield responses resulted from the addition of P and N. Leaf samples were analyzed for N, P, K, S, Ca, Mg, Mn, Zn, Cu, and B. Nutrient data were expressed in ratio form, and the population with yields >45 Mg·ha–1 were used to calculate the DRIS norms. The proposed norms for N, P, K, Mg, and Cu were tested using published data from independently conducted field and greenhouse studies. By accurately diagnosing the most limiting nutrients, these norms successfully predicted yield responses to treatment. Preliminary norms for S, Ca, Mn, Zn, and B were determined but not tested.

scholarly journals Effet Du Fumier Sur Le Bilan Des Éléments Nutritifs Des Champs Dans Le Terroir De La Néma Au Saloum (Sénégal)

2018 ◽  
Vol 14 (27) ◽  
pp. 126
Author(s):  
Ismaïla Coly ◽  
Babacar Diop ◽  
Arfang Ousmane Kémo Goudiaby
Keyword(s):  
Agricultural Production ◽  
Nutrient Balance ◽  
Ground Level ◽  
Nutrient Content ◽  
Constant Weight ◽  
Agricultural Potential ◽  
Phosphorus And Potassium ◽  
On Farm ◽  
Positive Effect ◽  
Nitrogen Phosphorus

In the land of Nema, fields show low agricultural potential due to high human and climatic pressure. To increase their agricultural production, the populations have opted either for the use of chemical fertilizer or for the supply of manure through the Agriculture-Livestock integration. This paper focuses on evaluating the effect of on-farm use of manure on groundnut pod and groundnut production, and nutrient balance at the field level. 20 square plots of 2m each were used per field on the monitored farms. The hay and pod samples were taken therein, weighed, and dried in an oven at 60° C to a constant weight. This work was carried out for both fertilized fields and unfertilized fields (controls). In these same farms, samples of manure produced were collected and analyzed. The production of peanut and groundnut pods in the fertilized fields and in the control fields shows an overall positive effect of the manure on the yields in the land of the Néma. Taking into account the figures of the average deficits, the nitrogen, phosphorus, and potassium balance is deficient in ground-level groundnut peanut fields. This is due to the low manure doses per hectare and its low nutrient content.

THE INFLUENCE OF IRRIGATION TREATMENTS ON YIELDS AND ON FERTILIZER UTILIZATION BY SWEET CORN AND SNAP BEANS

1962 ◽  
Vol 42 (2) ◽  
pp. 219-228 ◽  
Author(s):  
D. C. MacKay ◽  
C. A. Eaves
Keyword(s):  
Sweet Corn ◽  
Sprinkler Irrigation ◽  
Moisture Stress ◽  
Snap Beans ◽  
Natural Rainfall ◽  
Flower Stage ◽  
Irrigation Treatments ◽  
Phosphorus And Potassium ◽  
Yield Responses ◽  
Nitrogen Phosphorus

A range in each of the nutrients – nitrogen, phosphorus and potassium – was applied to an infertile Podzol soil in a split-plot experiment receiving the following sprinkler irrigation treatments: 1) "none", natural rainfall; 2) "minimum", 1 inch per irrigation during the critical stage of flowering to harvest; 3) "optimum", 1 inch per irrigation throughout the crop season; and 4) "excess", 2 inches per irrigation whenever 3) was applied.Both crops responded to irrigation during the flower to harvest stage but snap beans were more sensitive than sweet corn to moisture stress during the pre-flower stage. With both crops, yields from "excess" water were not significantly different from those of the "optimum" treatment.Greater yield responses were obtained from heavy rates of fertilizers with irrigation than without, and as a result the interaction of fertilizer × irrigation was significant in 3 of the 4 years. These effects appeared to be due mostly to the increased nutrient requirements of the larger crops, which resulted when moisture stress was removed, rather than to increased availability of native or applied nutrients. Phosphorus was the only nutrient whose concentration was consistently increased by irrigation, and this was slight.

The effcts of fertilizers on herbage production. II. The effect of nitrogen, phosphorus and potassium on botanical and chemical composition

1964 ◽  
Vol 63 (2) ◽  
pp. 209-219 ◽  
Author(s):  
J. W. S. Reith ◽  
R. H. E. Inkson ◽  
W. Holmes ◽  
D. S. Maclusky ◽  
D. Reid ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Botanical Composition ◽  
Factorial Experiments ◽  
Rye Grass ◽  
N Treatment ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Clover Content

Six factorial experiments, each lasting 3 years, were carried out to determine the effects of N, P and K on herbage cut five times each year.Clover almost disappeared with the 87 lb. N treatment and none survived with the 174and 348 lb. dressings. N increased the proportions of rye-grass and cocksfoot in the sward. P had no influence on botanical composition. K usually increased the clover content in the absence of, but had practically no effect in the presence of, N.

scholarly journals Use of trellis graphics in the analysis of results from field experiments in agriculture

2007 ◽  
Vol 4 (1) ◽  
Author(s):  
Katarina Čobanović ◽  
Emilija Nikolić-Đorić ◽  
Beba Mutavdžić
Keyword(s):  
Field Experiment ◽  
Field Experiments ◽  
Multidimensional Data ◽  
Data Sets ◽  
Vegetable Crops ◽  
Analysis Of Results ◽  
Phosphorus And Potassium ◽  
Novi Sad ◽  
Multidimensional Data Sets ◽  
Nitrogen Phosphorus

Trellis graphics (Becker, Cleveland, and Shyu, 1996) is a very effective method for visualizing multidimensional data sets. The basic idea behind trellis graphics is to display any of a large variety of 1-D, 2-D or 3-D statistical plot types in trellis layout of panels, where each panel displays a subset of the data for different values of one or more additional discrete or continuous conditioning variables. The data that we use for the illustration of different applications of trellis graphics are the results of a field experiment conducted at the Institute for Field and Vegetable Crops in Novi Sad in the period 1994–1998 (Čobanović et al., 2001) with three fertilizers (nitrogen, phosphorus and potassium) in three repetitions with nine variants of wheat. In the experiment, four quantities of each fertilizer were applied (0, 50, 100, 150 kg/ha) at plots of the same size in 20 from 64 possible combinations, whereby the yield of wheat (t/ha) was the measured outcome.

scholarly journals Macronutrient Stocks in Scots Pine Stands of Different Densities

Forests ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. 593 ◽  
Author(s):  
Andrzej Węgiel ◽  
Ernest Bielinis ◽  
Krzysztof Polowy
Keyword(s):  
Scots Pine ◽  
Aboveground Biomass ◽  
Nutrient Balance ◽  
Stand Density ◽  
Nutrient Balances ◽  
Calcium Magnesium ◽  
Phosphorus And Potassium ◽  
Whole Tree Harvesting ◽  
Nitrogen Phosphorus ◽  
Whole Tree

A positive nutrient balance is crucial to sustaining forest productivity. Differences in stand densities usually mean different aboveground biomass stocks and different proportions of tree compartments. These differences can be reflected in the different macronutrient stocks between stands of different densities, because various tree compartments have different element concentrations. In this study, 82-year-old stands of Scots pine were compared, and specifically, the concentrations of the elements in tree compartments and the amounts of macronutrients in aboveground biomass were compared. The nutrients considered in this study were nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur. A positive correlation between stand density and the level of stored macronutrients was found for nitrogen, phosphorus, and potassium. This result means that forest managers can influence nutrient balances by regulating stand densities or by harvesting methods (SOH: stem-only harvesting or WTH: whole-tree harvesting).

Sign in / Sign up

Export Citation Format

Share Document