INFLUENCE OF FORM AND MODE OF NITROGEN FERTILIZER APPLICATION ON THE AVAILABILITY OF SOIL AND FERTILIZER POTASSIUM

1966 ◽  
Vol 46 (1) ◽  
pp. 23-28 ◽  
Author(s):  
D. K. Acquaye ◽  
A. J. MacLean
Keyword(s):  
Nitrogen Fertilizer ◽  
Sandy Loam ◽  
Fertilizer Application ◽  
Inhibitory Effect ◽  
Sandy Loam Soil ◽  
Chemical Extraction ◽  
K Uptake ◽  
Exchangeable K ◽  
K Fertilizer ◽  
Loam Soil

Ammonium applied alone or after addition of K depressed the uptake of K by oats grown in a sandy loam soil in the greenhouse. When NH4 was added first and K later at seeding, however, NH4 increased K-uptake.In the absence of K fertilizer, NH4 reduced the release of non-exchangeable K to the plants. When added prior to or at the same time as K at seeding, NH4 reduced K-fixation. This inhibitory effect of NH4 on fixation of added K was reflected in higher amounts of K in solution as shown by lower [Formula: see text] ratios. These results of chemical extraction of the soil indicated that the effects of NH4 on K-uptake by the oat crop arose from reactions in the soil.

scholarly journals A presentation of leaf analytical data of cacao, obtained from a fertilizer trial in Netherlands New Guinea.

1960 ◽  
Vol 8 (2) ◽  
pp. 93-97
Author(s):  
G.H. Schroo
Keyword(s):  
Sandy Loam ◽  
N Uptake ◽  
Analytical Data ◽  
New Guinea ◽  
Sandy Loam Soil ◽  
K Uptake ◽  
High K ◽  
Loam Soil

200 g double super and/or 100 g K2SO4 were broadcast in a circular strip of loosened soil round each tree on a sandy loam soil of low P, Mg and Ca, medium N and high K status. Leaf Ca was higher in fertilized than in control trees; Mg uptake was not influenced by the treatment; K uptake, already high, was not unduly increased by fertilizing; uptake of P was doubled by P applications; N uptake was not greatly increased. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Agronomical Field Testing of New Kinds of Multicomponent Mineral Fertilizers

2014 ◽  
Vol 17 (1) ◽  
pp. 79
Author(s):  
K.T. Zhantasov ◽  
Z.U. Myrhalykov ◽  
S.M. Moldabekov ◽  
M.K. Zhantasov ◽  
B.T. Omarov ◽  
...  
Keyword(s):  
Sandy Loam ◽  
Mineral Fertilizer ◽  
Field Testing ◽  
Fertilizer Application ◽  
Sandy Loam Soil ◽  
Mineral Fertilizers ◽  
Essential Difference ◽  
Loam Soil ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Analysis of modern scientific literature and patents has shown the absence of acid-free production technology of a mechanically activated multicomponent mineral fertilizer containing water-holding substances. Experimental researches connecting with mechanochemical activation and physicochemical properties of Karatau phosphorites prove a possibility of development of a new multicomponent mineral fertilizer. Application of inorganic and organic activators considerably improves qualities of fertilizers because the developed fertilizer mixtures contain nitrogen, phosphorus, potassium, humate and microelements. The suggested technology intends to use wastes of coal mining that leads to presence of humates and microelements in the end product. It was determined, that content of total nitrogen, phosphorus and potassium depends on a form of nitrogen-phosphorus-potassium-containing substances. The given article contains data of researches connecting with use of multicomponent mineral fertilizers in field conditions for cotton cultivation on irrigated light sierozems consisting of soil-forming rocks of loess and loess-type clay loams. The research results show the increase of soil’s fertility and cotton’s productivity. Studying of agronomic efficiency of the new kinds of mechanically activated multicomponent mineral fertilizers at the cultivation of a bean-cereal mixture has been carried out in the Negorelsk experimental nursery-garden of the Belarus State Technical University on a sod-podzol sandy-loam soil and has shown the essential influence on productivity and quality of the bean-cereal mixture. The researches fulfilled on a sod-podzol sandy-loam soil have revealed the essential increase of key indicators of feed productivity. Application of the mineral fertilizers has promoted increase of nitrogen, phosphorus and potassium content in green plants. In so doing content of calcium and magnesium in green mass depends from quantity of the fertilizer used to a smaller extent. An essential difference of crop capacity and feed productivity indicators depending on forms of the applied mineral fertilizers has not been found.

The effects of subsoiling and deep incorporation of P and K fertilizers on the yield and nutrient uptake of barley, potatoes, wheat and sugar beet grown in rotation

1979 ◽  
Vol 92 (3) ◽  
pp. 695-702 ◽  
Author(s):  
J. McEwen ◽  
A. E. Johnston
Keyword(s):  
Sugar Beet ◽  
Nutrient Uptake ◽  
Sandy Loam ◽  
Dolomitic Limestone ◽  
Exchangeable K ◽  
K Fertilizer ◽  
Loam Soil ◽  
Small Plot ◽  
The Mean ◽  
Plot Experiment

SUMMARYA small-plot experiment on sandy loam soil at Woburn tested the effects of subsoiling by hand and of incorporating a large dressing of P and K fertilizer into the subsoil.Ths treatments were applied once in 1973 and their effects were assessed from 1974 to 1977 on the yields of, and N, P, K uptakes by, barley, potatoes, wheat and sugar beet grown in rotation. All crops were present each year and all plots received annual seedbed dressings of N, P and K appropriate to the crop. Dolomitic limestone was applied once in the rotation. The effects of the treatments on P soluble in 0·5 M-NaHCO3 and exchangeable K in surface and subsoils were measured.Subsoiling alone increased the 4-year mean yield of wheat by 21%, of barley by 24% and of sugar from sugar beet by 11%. Mean yield of potatoes was unaffected.Incorporating P and K into the subsoil increased the mean yield of potatoes by 16% and further increased mean yield, in addition to the effect of subsoiling, of barley by 20% and of sugar by 4%. Mean yield of wheat was not further affected.

scholarly journals Kinetics of potassium release from soil amended with clinoptilolite zeolite and maize stalks biochar

2021 ◽  
Vol 2 (1) ◽  
pp. 50-56
Author(s):  
Fatma N. Thabit ◽  
Keyword(s):  
Release Rate ◽  
Sandy Loam ◽  
Sandy Loam Soil ◽  
Exchangeable K ◽  
Randomized Design ◽  
Loam Soil ◽  
Kinetics Of ◽  
Maize Stalks ◽  
K Release ◽  
Cacl2 Solution

A laboratory incubation experiment in a completely randomized design with three replications was carried out for 90 days to test the effect of zeolite and biochar application to calcareous sandy loam soil on potassium forms distribution and its release rate. The treatments included (1) Absolute control (C), (2) 10 g kg-1 zeolite (Z1), (3) 20 g kg-1 zeolite (Z2), (4) 10 g kg-1 biochar (B1), and (5) 20 g kg-1 biochar (B2). After incubation period, the concentrations of soluble, exchangeable, and non-exchangeable K and the release rate of K to 0.01 M CaCl2 during 200 min (10 successive extractions for soil samples of 20 min for each using CaCl2 solution) were determined. Results showed that zeolite application increased the soluble and exchangeable K concentrations. However, amending soil with biochar had a positive effect on all K forms. Addition of zeolite or biochar increased the cumulative K release. The parabolic diffusion, power function and Simple Elovich models described the kinetics of K release to CaCl2 solution well from all the soil treatments. Zeolite and maize stalks biochar may have an effective role in improvement of K availability and release in the calcareous sandy loam soil as well as may aid in increasing the ability of this soil to supply the different crops with K.

scholarly journals Nitrate and potassium movement in a sandy loam soil cultivated with fertigated grapevine (Vitis vinifera /L.) in the Brazilian semiarid

2018 ◽  
Vol 40 (5) ◽  
Author(s):  
Alexsandro Oliveira da Silva ◽  
Luis Henrique Bassoi ◽  
Davi José Silva
Keyword(s):  
Soil Solution ◽  
Nitrogen Fertilization ◽  
Sandy Loam ◽  
Water Flux ◽  
Fertilizer Application ◽  
Sandy Loam Soil ◽  
Vitis Vinifera L ◽  
Growing Seasons ◽  
Brazilian Semiarid ◽  
Loam Soil

Abstract Fertigation can increase the efficiency of fertilizer application and facilitate the nutritional management of a crop. Thus, nitrate and potassium movements in a sandy loam soil were evaluated as function of fertilizer doses during three growing seasons of the grapevine cv. Syrah grafted on Paulsen 1103 rootstock (June to October 2013, February to June 2014, and August to November 2014) in Petrolina, state of Pernambuco, Brazil. Five doses of N (0, 15, 30, 60 and 120 kg ha-1) and five doses of K2O (0, 15, 30, 60 and 120 kg ha-1) were combined in a fractional 52 factorial design, totaling 13 combinations, in a randomized blocks experiment with four replications. The concentrations of nitrate and potassium in the soil solution were determined. Samples were collected by porous cup extractors installed at 0.4 and 0.6 m depths. The movement of these ions was obtained by the product between their concentration in the soil solution and the soil water flux density. The increase in nitrogen fertilization promoted a greater movement of NO3- (62.2 kg ha-1) in the soil. The movement of K+ was also observed in two growing seasons .

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