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.

scholarly journals Corn Stover Removal Responses on Soil Test P and K Levels in Coastal Plain Ultisols

2021 ◽  
Vol 13 (8) ◽  
pp. 4401
Author(s):  
Jeffrey M. Novak ◽  
James R. Frederick ◽  
Don W. Watts ◽  
Thomas F. Ducey ◽  
Douglas L. Karlen
Keyword(s):  
Coastal Plain ◽  
Nutrient Removal ◽  
Fertilizer Application ◽  
First Year ◽  
Soil Test ◽  
Concentration Data ◽  
Extractable P ◽  
K Fertilizer ◽  
Soil Test P ◽  
K Concentration

Corn (Zea mays L.) stover is used as a biofuel feedstock in the U.S. Selection of stover harvest rates for soils is problematic, however, because excessive stover removal may have consequences on plant available P and K concentrations. Our objective was to quantify stover harvest impacts on topsoil P and K contents in the southeastern U.S. Coastal Plain Ultisols. Five stover harvest rates (0, 25, 50, 75 and 100% by wt) were removed for five years from replicated plots. Grain and stover mass with P and K concentration data were used to calculate nutrient removal. Mehlich 1 (M1)-extractable P and K concentrations were used to monitor changes within the soils. Grain alone removed 13–15 kg ha−1 P and 15–18 kg ha−1 K each year, resulting in a cumulative removal of 70 and 85 kg ha−1 or 77 and 37% of the P and K fertilizer application, respectively. Harvesting stover increased nutrient removal such that when combined with grain removed, a cumulative total of 95% of the applied P and 126% of fertilizer K were taken away. This caused M1 P and K levels to decline significantly in the first year and even with annual fertilization to remain relatively static thereafter. For these Ultisols, we conclude that P and K fertilizer recommendations should be fine-tuned for P and K removed with grain and stover harvesting and that stover harvest of >50% by weight will significantly decrease soil test M1 P and K contents.

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.

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.

Comparison of the effects of potassium fertilizer on the yield, potassium content and quality of 22 different vegetable and agricultural crops

1980 ◽  
Vol 95 (2) ◽  
pp. 441-456 ◽  
Author(s):  
D. J. Greenwood ◽  
T. J. Cleaver ◽  
Mary K. Turner ◽  
J. Hunt ◽  
K. B. Niendorf ◽  
...  
Keyword(s):  
Dry Matter ◽  
General Relation ◽  
Dry Weight ◽  
Fertilizer Application ◽  
Optimum Level ◽  
Potassium Fertilizer ◽  
Plant Weight ◽  
K Fertilizer ◽  
P Fertilizer ◽  
The Difference

SUMMARYSixty-one experiments with 15 levels of K fertilizer in the presence of excess N and P fertilizer were carried out on adjacent sites of the same field. Yield was always related to level of K fertilizer by a ‘diminishing returns’ type curve, and a derived equation, which defined relative responsiveness in terms of a single parameter, fitted the data for each crop very satisfactorily. Although the responsiveness of many of the crops was similar there were marked differences and the optimum levels of K (defined as the level at which a further 10 kg/ha increased yield by 1%) varied from 0 to 360 kg/ha, depending on the crop. Responsiveness was largely independent of the plant family to which the crop belonged, but was related to the mean plant weight atharvest; the larger the weight the less reponsive the crop. No general relation existed between responsiveness and duration of growth.The % K in the dry matter of leaves (including stems) at harvest of crops receiving the optimum levels of K fertilizer was mainly determined by the family. It was generally between 0·9 and 1·1 for the Amaryllidaceae, between 1·1 and 1·2 for the Leguminosae and between 1·9 and 2·5% for the Cruciferae. The difference between the % K in the dry matter with the optimum level of K fertilizer and that with no fertilizer was proportional to responsiveness. Percentage K at harvest was a good indicator of the extent to which crop growth was restricted by lack of potassium.At harvest crops receiving the optimum levels of K fertilizer contained between 29 and 220 kg/ha of K, but uptake increased asymptotically to a maximum as K applications were raised to higher levels. Maximum uptake for nearly all crops was almost double the uptake with the optimum fertilizer application.Percentage recovery of 100 kg/ha of added K fertilizer varied between 8 and 70%, roughly in proportion to the total crop dry weight, which varied between 1 and 15 t/ha.Effects of level of K fertilizer on crop quality were also measured and over the practical range of applications the effects were generally small.The differences between the K requirements of crops are discussed and it is argued that the responsiveness of one crop relative to that of another would be expected to be similar on a range of soils.

Comparison of Chemical Extraction Methods for Determination of Soil Potassium in Different Soil Types

2017 ◽  
Vol 50 (12) ◽  
pp. 1420-1427 ◽  
Author(s):  
V. Zebec ◽  
D. Rastija ◽  
Z. Lončarić ◽  
A. Bensa ◽  
B. Popović ◽  
...  
Keyword(s):  
Extraction Methods ◽  
Soil Types ◽  
Chemical Extraction ◽  
Soil Potassium ◽  
Chemical Extraction Methods

scholarly journals Parametric and Optimization Studies on the entrapment of Potassium Fertilizer into Chitosan-Poly(methacrylic acid) Carrier via Ionic Gelation

2019 ◽  
Vol 268 ◽  
pp. 06009 ◽  
Author(s):  
Diana Jane M. Plofino ◽  
Clint Charles P. Brutas ◽  
Catalino G. Alfafara ◽  
Monet Concepcion Maguyon-Detras ◽  
Veronica P. Migo
Keyword(s):  
Slow Release ◽  
Fertilizer Application ◽  
Release Mechanism ◽  
Ionic Gelation ◽  
Polymerization Time ◽  
Potassium Fertilizer ◽  
K Fertilizer ◽  
Ft Ir ◽  
The Fourier Transform ◽  
Bodies Of Water

Nanofertilizer is an emerging technology for exhibiting slow release mechanism of fertilizer application. This slow release mechanism allows increase in nutrient uptake of plants while minimizing environmental pollution; specifically, reducing eutrophication in bodies of water. This study includes parametric and optimization studies for ionic gelation process in the formulation of potassium fertilizer in chitosan polymethacrylic acid (CS-PMAA) carrier, and subsequent characterization of the formulated K fertilizer. A 2k factorial experimnental design was initially implemented to determine significant factors. Results show that polymerization time inversely affects the K content concentration of the K-CS-PMAA fertilizer due to the swelling behavior of chitosan, while K:CS-PMAA ratio directly affects the K content concentration. Upon numerical optimization, the conditions found to maximize K content of the formulated fertilizer are 3000 ppm K+ corresponding to 1.5:1 ratio of the K loading concentration to CS-PMAA carrier for 30 mins polymerization time. The optimum K content of K-CS-PMAA fertilizer is about 34.98% w/w – less than the 44.27% w/w K content of the fertilizer grade, muriate of potash (MOP). The Dynamic Light Scattering (DLS) and Scanning Electron Microscope (SEM) results of 368.1 nm and 75.4 nm, respectively, indicated that K-CS-PMAA is nanosized. The Fourier Transform Infrared Spectroscopy (FT-IR) results proved the presence of CS-PMAA with deviations at 1483.01 and 1405.07 caused by the vibration in the --COO-anion groups of PMAA indicating the attachment of potassium in the nanoparticle. Furthermore, the fertilizer formulated was proved to exhibit slow release behavior with the value of 83.70% K+ release after 48 hours compared to the 99.43% release of MOP.

scholarly journals The effect of sodium and potassium fertilizer on the mineral composition of sugar beet

1961 ◽  
Vol 56 (3) ◽  
pp. 383-388 ◽  
Author(s):  
S. N. Adams
Keyword(s):  
Sugar Beet ◽  
Fertilizer Application ◽  
Sodium Content ◽  
Potassium Fertilizer ◽  
Field Methods ◽  
Soil Potassium ◽  
Potash Fertilizer ◽  
Growing Seasons ◽  
Sodium And Potassium ◽  
Uptake Of Nutrients

Plants from salt and potash fertilizer trials at Bothamsted were harvested at intervals throughout the growing seasons of 1942 and 1943 and analysed for N, K, Na, Ca, Mg and Mn.The uptake of nutrients is discussed with respect to field methods of fertilizer application.Salt increased beet yield in both years, but it did not act by mobilizing soil potassium reserves and increasing the potassium status of the plant. Potash fertilizer, although increasing the potassium status of the plant, did not increase yield. Sodium and potassium were differently distributed in the plant. At harvest, only 6% of the plant's sodium content was in the root compared with 33% of the potassium. The potassium, but not the sodium content of the petiole, was higher than that of the lamina until the end of August. Sodium thus is a nutrient for beet and not a potassium substitute.

The movement of potassium in irrigated and fertilized red sandy clay

1940 ◽  
Vol 30 (3) ◽  
pp. 499-502 ◽  
Author(s):  
D. Lachower
Keyword(s):  
Irrigation Water ◽  
Soil Profile ◽  
Fertilizer Application ◽  
Water Soluble ◽  
Exchangeable Potassium ◽  
Potassium Fertilizer ◽  
Soil Potassium ◽  
Sandy Clay

The present investigation was intended to furnish information concerning:(1) The movement of water-soluble and exchangeable potassium in the soil profile after successive fertilizer applications.(2) The form of potassium—exchangeable, soluble, or non-exchangeable—into which added potassium fertilizer is converted in the soil.(3) The effect of doubling the fertilizer ration on the absorption of potassium by the soil; and the effect of doubling the ration of irrigation water on the absorption and accumulation of potassium in the soil.(4) The effect of frequent successive summer irrigation following fertilizer application on the distribution of the three forms of soil potassium.(5) The effect of fertilization followed by irrigation on soil pH. value.

scholarly journals Total soil electrical conductivity and critical soil K+ to Ca2+ and Mg2+ ratio for potato crops

1999 ◽  
Vol 56 (4) ◽  
pp. 993-997 ◽  
Author(s):  
Roberto Anjos Reis Jr. ◽  
Paulo Cezar Rezende Fontes ◽  
Júlio Cesar Lima Neves ◽  
Nerilson Terra Santos
Keyword(s):  
Electrical Conductivity ◽  
Tuber Yield ◽  
Block Design ◽  
Fertilizer Application ◽  
Linear Increase ◽  
Potassium Fertilizer ◽  
Total Electrical Conductivity ◽  
Randomized Block Design ◽  
K Fertilizer ◽  
Set Up

Soil K+ to Ca2+ and Mg2+ ratio as well as the total salinity were evaluated in response to potassium fertilizer application onto potato. Potassium was applied at six different rates (0, 60, 120, 240, 480 and 960 kg ha-1 of K2O), as K2SO4, and was placed during planting time in the furrow. Soil from the 0-200 mm layer was collected in the furrow, 20 and 48 days after plant emergence (DAE) to evaluate soil pH, K+, Ca2+ and Mg2+ contents and the total electrical conductivity (EC). A factorial design (6x2), with six K rates and two sampling times was set up in a randomized block design with four replications. The application of K fertilizer increased exchangeable K, did not affect pH and exchangeable Ca and Mg contents, but caused a linear increase of the soil K+/(Ca2++Mg2+)1/2 ratio as well as EC. At 20 DAE, the critical soil K+/(Ca2++Mg2+)1/2ratio and the EC associated with maximum tuber yield (30.5 Mg.ha-1, with 353.4 kg ha-1 of K2O) were 1.79 and 1.6 dS m-1, respectively. The highest soil K+/(Ca2++Mg2+)1/2 ratio and EC were obtained with the highest application of K fertilizer, which led to a reduction in the potato tuber yield.

scholarly journals Spatial variability of soil potassium in sugarcane areas subjected to the application of vinasse

2014 ◽  
Vol 86 (4) ◽  
pp. 1999-2012 ◽  
Author(s):  
LAÉRCIO A. DE CARVALHO ◽  
ISMAEL MEURER ◽  
CARLOS A. DA SILVA JUNIOR ◽  
CRISTIANE F.B. SANTOS ◽  
PAULO L. LIBARDI
Keyword(s):  
Spatial Variability ◽  
Fertilizer Application ◽  
Descriptive Statistics ◽  
Management Zones ◽  
Soil Potassium ◽  
Efficient Management ◽  
Geostatistical Techniques ◽  
Definition Of ◽  
Different Levels

When deposited on land the vinasse can promote improvement in fertility, however, often fertilizer application occurs in areas considered homogeneous, without taking into account the variability of the soil. The objective of this study was to evaluate the effect of vinasse application on potassium content in two classes of soils cultivated with sugarcane, and characterize the spatial variability of soil using geostatistical techniques. In the 2010 and 2011 crop year, soil samples were collected from an experimental grid at 0-0.2 and 0.2-0.4 m depth in three soils cultivated with sugarcane, totaling 90 samplings in each grid, for the determination of pH, calcium (Ca), magnesium (Mg), potassium (K), phosphorus (P), aluminum (Al) and potential acidity (H + Al). The data have been submitted to analysis of descriptive statistics and the K attribute was subjected to geostatistical analysis. The coefficient of variation indicated medium and high variability of K for the three soils. The results showed that the spatial dependence of K increased in depth to FRce and decreased to PHlv, indicating that the attribute could have followed the pattern of distribution of clay in depth. The investigation of the spatial variability of K on the surface and subsurface soils provided the definition of management zones with different levels of fertility, which can be organized into sub-areas for a more efficient management of the resources and the environment.

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