Nitrogen and phosphorus nutrition of dryland grain sorghum at Katherine, Northern Territory. 3. Effect of nitrogen carrier, time and placement

1978 ◽  
Vol 18 (95) ◽  
pp. 834 ◽  
Author(s):  
RJK Myers
Keyword(s):  
Ammonium Nitrate ◽  
Ammonium Sulphate ◽  
Field Experiments ◽  
Grain Sorghum ◽  
Northern Territory ◽  
Nitrogen And Phosphorus ◽  
Rooting Zone ◽  
Loam Soil ◽  
Dry Soil ◽  
Moisture Conditions

Different nitrogen carriers, and placements and strategies of application to dryland grain sorghum growing in a clay loam soil were compared in field experiments at Katherine, Northern Territory. The nitrogen carriers were ammonium sulphate, ammonium nitrate, urea and anhydrous ammonia ; placements were banding, mixing into the topsoil, and broadcasting; and strategies consisted of split application, and varying time of broadcasting. The rate used throughout was 50 kg N ha-1.Responses to the various treatments varied between the two seasons (1970-71, 1971-72) due to differing soil moisture conditions. There was a response to broadcasting nitrogen after emergence, giving higher grain yield and nitrogen yield than earlier broadcasting or application with the seed. Banded nitrogen (both seasons) and split nitrogen (one season) were superior to other methods of applying nitrogen with the seed. The only yield differences between sources of nitrogen were with broadcast application, where ammonium sulphate proved superior in one season, and with respect to apparent recovery of nitrogen by the crop, when the order ammonium nitrate > ammonium sulphate > urea was observed in both seasons. It is suggested that in this environment and on this soil, nitrogen is not particularly susceptible to volatilization, and broadcasting urea and ammonium fertilizer onto dry soil may retain nitrogen within the rooting zone, in comparison with nitrate, which is more susceptible to leaching. Incorporated fertilizer is more susceptible to nitrification and subsequent leaching, while banded nitrogen appears to resist nitrification and leaching.

Nitrogen and phosphorus nutrition of dryland grain sorghum at Katherine, Northern Territory. 4. 15-nitrogen studies on nitrogen carrier and method of application

1979 ◽  
Vol 19 (99) ◽  
pp. 481 ◽  
Author(s):  
RJK Myers
Keyword(s):  
Ammonium Nitrate ◽  
Ammonium Sulphate ◽  
Field Experiments ◽  
N Uptake ◽  
Poor Performance ◽  
Nitrogen Sources ◽  
Grain Sorghum ◽  
Nitrogen And Phosphorus ◽  
Significant Treatment ◽  
Effective Source

The effect of nitrogen source and method of application on yield and N uptake of dryland grain sorghum was studied, using 15-nitrogen labelled fertilizers. The nitrogen sources were ammonium sulphate, ammonium nitrate and urea, and the methods were banded, mixed and split application, using a rate of 50 kg N ha-1 throughout. The experiment was conducted over two wet seasons, 1970-71 and 1971-72. Method of application increased yield and nitrogen uptake in the order banded > mixed > split. Source of nitrogen resulted in the order ammonium sulphate = ammonium nitrate > urea. In the drier season, urea behaved somewhat differently, i.e. banded urea > banded ammonium nitrate= banded ammonium sulphate. Calculation of percentage recovery in general confirmed these results. It was concluded that nitrogenous fertilizer is more effective when banded, and that urea was a less effective source of nitrogen than the two ammonium salts. The results obtained with 15-nitrogen revealed a significant treatment effect that was not apparent in non-tracer experiments namely, the poor performance of urea in the second year. Because of its greater sensitivity, and because it identifies the nitrogen derived from fertilizer, the 15-nitrogen technique has scope for use in field experiments comparing fertilizers and cultural techniques.

Nitrogen and phosphorus nutrition of dryland grain sorghum at Katherine, Northern Territory. 2. Effect of rate and source of phosphorus fertilizer

1978 ◽  
Vol 18 (93) ◽  
pp. 564 ◽  
Author(s):  
RJK Myers
Keyword(s):  
Field Experiments ◽  
Grain Sorghum ◽  
Northern Territory ◽  
Diammonium Phosphate ◽  
Yield Response ◽  
Growth Stages ◽  
Growth Responses ◽  
Triple Superphosphate ◽  
Monoammonium Phosphate ◽  
Nitrogen And Phosphorus

Field experiments were conducted at Katherine, Northern Territory, in 1970-71 and 1971 -72 to examine responses of dryland grain sorghum to applied phosphorus at different growth stages. In the first, the effect of rate of application up to 100 kg P ha-1 as triple superphosphate was investigated. Growth responses to phosphorus were noted from mid-elongation onwards, but the magnitude of response varied between seasons, being greater in the higher rainfall season 1970-71. Maximum yields of grain were 7730 kg ha-1 with 50 kg P ha-1 in 1970-71, and 4440 kg ha-1 with 100 kg P ha-1 in 1971-72, which were increases of 49 and 37 per cent respectively over the appropriate zero phosphorus treatment. These suggested an increased requirement for phosphorus over previous recommendations. Phosphorus reduced the time from emergence to anthesis from 68 to 60 and from 70 to 63 days respectively in the two seasons. About half of the plant phosphorus was taken up after anthesis. It was concluded from soil analysis that phosphate-treated plots had an enhanced supply of phosphorus throughout the period of crop growth. In the second study, four phosphorus sources (superphosphate, triple superphosphate, monoammonium phosphate, and diammonium phosphate) were compared. With 25 kg P ha-1 and with constant nitrogen, grain yield response followed the order superphosphate > monoammonium phosphate > diammonium phosphate > triple superphosphate in both years. Triple superphosphate tended to give lower dry matter yields and nitrogen and phosphorus concentrations than the other three sources.

Nitrogen and phosphorus nutrition of dryland grain sorghum at Katherine, Northern Territory. 1. Effect of rate of nitrogen fertilizer

1978 ◽  
Vol 18 (93) ◽  
pp. 554 ◽  
Author(s):  
RJK Myers
Keyword(s):  
Nitrogen Fertilizer ◽  
Field Experiments ◽  
Nitrogen Concentration ◽  
Balance Sheet ◽  
Grain Sorghum ◽  
Northern Territory ◽  
Grain Weight ◽  
Nitrogen And Phosphorus ◽  
Nitrogen Response ◽  
Applied Nitrogen

Responses of dryland grain sorghum to applied nitrogen were examined in three field experiments at Katherine, Northern Territory, in 1969-70, 1970-71 and 1971-72. Rates of nitrogen up to 89 kg ha-1 in the first season and up to 200 kg ha-1 in subsequent seasons were used. The crops were sampled at floral initiation, mid-elongation, anthesis, and maturity. The three growing seasons were rated as below average, above average and average, respectively, for grain sorghum production. Nitrogen response was strongly season-dependent, Maximum yields (adjusted to 14 per cent moisture) were: 1969-70, 2280 kg ha-1, with 22.4 kg N ha-1 applied (with lower yields at higher rates of nitrogen) ; 1970-71,7730 kg ha-1 with 150 kg N ha-1 applied; and 1971-72,4440 kg ha-1 with 200 kg N ha-1 applied. These represented increases of 6, 50, and 62 per cent, respectively, over the zero nitrogen treatments. Applied nitrogen increased grain numbers per head and individual grain weight, but had no significant effect on head numbers. Applied nitrogen increased yields of nitrogen and phosphorus in plant material, and increased nitrogen concentration in plant parts. Apparent recoveries of nitrogen fertilizer ranged from 0 to 40 per cent, depending on year and rate applied. An approximate balance sheet suggested substantial losses from the mineral nitrogen pool in 1970- 71, a year of above average rainfall. Significant interactions between nitrogen and phosphorus fertilizer occurred only with grains per head and thousand grain weight.

Field experiments comparing ammonium nitrate and ammonium sulphate as top-dressings for winter wheat and grassland

1964 ◽  
Vol 62 (3) ◽  
pp. 377-379 ◽  
Author(s):  
J. R. Devine ◽  
M. R. J. Holmes
Keyword(s):  
Great Britain ◽  
Winter Wheat ◽  
Ammonium Nitrate ◽  
Ammonium Sulphate ◽  
Field Experiments

Ammonium nitrate and ammonium sulphate wore compared as top-dressing applications in thirty-six field experiments on winter wheat and eighty-nine on grassland in various parts of Great Britain in 1956-62. The rates of application were 35-60 lb./acre of nitrogen for winter wheat and 30-100 lb./acre for grassland in one application only.

Aqueous ammonia compared with other nitrogenous fertilizers as solids and solutions on grass

1968 ◽  
Vol 71 (2) ◽  
pp. 195-203 ◽  
Author(s):  
D. R. Hodgson ◽  
A. P. Draycott
Keyword(s):  
Ammonium Nitrate ◽  
Ammonium Sulphate ◽  
Dry Matter ◽  
Field Experiments ◽  
Aqueous Ammonia ◽  
Single Injection ◽  
Maximum Yield ◽  
Italian Ryegrass ◽  
Dry Matter Yield ◽  
Single Application

SUMMARYField experiments with Italian ryegrass cut four times a year compared aqueous ammonia with ammonium sulphate and with a mixture of ammonium nitrate and urea (equal parts by weight). In 1963 four rates of nitrogen, 224, 448, 672 and 896 lb/acre, were applied as single and split dressings of injected aqueous ammonia, as solid ammonium sulphate and as injected solution of ammonium sulphate. There was little difference in total dry-matter yield between a single injection of aqueous ammonia and the split dressing of solid. Injecting ammonium sulphate solution eliminated scorch caused by single applications of solid supplying 448 lb N/acre or more and gave significantly greater dry-matter yields. A single application of 448 lb N/acre provided enough nitrogen to sustain the response of the grass to the end of the season.In 1964 a single injection of aqueous ammonia was compared with ammonium nitrate/urea applied as solid or solution at 280, 560 and 840 lb N/acre. There was no difference in total dry-matter yield between aqueous ammonia and ammonium nitrate/urea at rates of 560 and 840 lb/acre. At 280 lb/acre a split dressing of solid produced most dry matter. More than 280 lb N/acre was required, therefore, as a single application in spring to last the whole season, but this rate of nitrogen applied as a split dressing was almost sufficient to give maximum yield.In both experiments the seasonal distribution of dry matter was similar for single and split applications except in 1963 when large single injections of ammonium sulphate produced greater yields at the third cut than the split applications. The percentage of nitrogen recovered in the harvested grass decreased as nitrogen rate was increased and was greater from single than split applications. Recovery of nitrogen from aqueous ammonia was less efficient from four injections than one, and was greater in 1964 than 1963 due to better penetration of the sward by injector tines. Least nitrogen was recovered from surface-applied solutions of ammonium nitrate/urea. Regressions of dry-matter yield on nitrogen yield showed that single injections of aqueous ammonia were as efficient as other fertilizers tested.

Field experiments comparing autumn and spring applications of ammonium sulphate, ammonium nitrate and calcium nitrate for winter wheat

1964 ◽  
Vol 63 (1) ◽  
pp. 69-74 ◽  
Author(s):  
J. R. Devine ◽  
M. R. J. Holmes
Keyword(s):  
Winter Wheat ◽  
Ammonium Nitrate ◽  
Ammonium Sulphate ◽  
Field Experiments ◽  
Calcium Nitrate ◽  
Winter Rainfall

1. Ten experiments were carried out on winter wheat in various parts of England in 1959-61, to compare 60 lb./acre of nitrogen broadcast as ammonium sulphate, ammonium nitrate and calcium nitrate (a) all in autumn, (6) one-third in autumn and two-thirds in spring, (c) all in spring. The winter rainfall was high in four experiments and moderate in six.

Field experiments comparing winter and spring applications of ammonium sulphate, ammonium nitrate, calcium nitrate and urea to grassland

1965 ◽  
Vol 64 (1) ◽  
pp. 101-107 ◽  
Author(s):  
J. R. Devine ◽  
M. R. J. Holmes
Keyword(s):  
Ammonium Nitrate ◽  
Ammonium Sulphate ◽  
Field Experiments ◽  
Calcium Nitrate ◽  
Early Winter ◽  
Nitrogen Yield

Fourteen experiments were carried out in various parts of England to compare ammoniumsulphate, ammonium nitrate, calcium nitrate andurea applied to grassland in early winter, latewinter and spring at rates supplying 40 and 80lb./acre of nitrogen. Yield of herbage and of nitrogen were recorded at one cut in spring..

scholarly journals Efficacy of the Nitrification Inhibitor 3,4 Dimethylpyrazol Succinic Acid (DMPSA) when Combined with Calcium Ammonium Nitrate and Ammonium Sulphate—A Soil Incubation Experiment

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1334
Author(s):  
Niharika Rahman ◽  
Catarina Henke ◽  
Patrick J. Forrestal
Keyword(s):  
Succinic Acid ◽  
Ammonium Nitrate ◽  
Ammonium Sulphate ◽  
Sandy Soil ◽  
Sandy Loam ◽  
Nitrification Inhibitor ◽  
Sandy Loam Soil ◽  
Incubation Experiment ◽  
Calcium Ammonium Nitrate ◽  
Loam Soil

The efficacy of the new nitrification inhibitor 3,4 dimethylpyrazol succinic acid (DMPSA) was tested with calcium ammonium nitrate (CAN) and ammonium sulphate (AS) fertilisers in an incubation experiment using a sandy loam soil and a sandy textured soil. The experiment was conducted over 80 days. For AS fertiliser, inclusion of DMPSA resulted in significantly less NO3−-N present after 19 days in both soils. In the case of CAN, inclusion of DMPSA resulted in significantly less NO3−-N present after 45 days in the sandy loam soil and after 30 days in the sandy soil. DMPSA is effective nitrification inhibitor when combined with CAN and AS, with a mean reduction of 61% and 58%, respectively, in the average daily nitrification rate over the study period. Over the 80-day incubation period in the sandy loam soil, only 35% NH4+-N was converted to NO3−-N for AS + DMPSA compared to 88% for AS. In the sandy soil, 92% NH4+-N was converted to NO3−-N for AS compared with only 9% for AS + DMPSA by day 80. The results demonstrate that DMPSA is an effective nitrification inhibitor when combined with CAN and AS.

Field experiments comparing ammonium sulphate, ammonium nitrate, calcium nitrate and urea combine-drilled with spring barley

1963 ◽  
Vol 61 (3) ◽  
pp. 381-390 ◽  
Author(s):  
J. R. Devine ◽  
M. R. J. Holmes
Keyword(s):  
Ammonium Nitrate ◽  
Ammonium Sulphate ◽  
Field Experiments ◽  
Spring Barley ◽  
Calcium Nitrate ◽  
Nitrogen Sources ◽  
Early Growth ◽  
Plant Population ◽  
Nitrogen Fertilizers ◽  
Grain Yields

1. Twenty-one experiments were carried out in various parts of England and Scotland in 1959–61 comparing two or more of the nitrogen sources ammonium sulphate, ammonium nitrate, calcium nitrate and urea, combine-drilled in compound fertilizers for spring barley.2. Ammonium sulphate and ammonium nitrate combine-drilled at rates from 35 to 105 lb./acre of nitrogen checked early growth slightly in some of the experiments, with no important difference between the two sources, which also gave similar grain yields.3. Calcium nitrate and urea combine-drilled at 45 lb./acre of nitrogen had no large effect on early growth, while at 70 and 90 lb./acre both fertilizers seriously delayed brairding and reduced the plant population in many of the experiments, especially in eastern England. They gave lower yields than ammonium sulphate and ammonium nitrate in many of the experiments in which early growth was affected, and gave lower mean yields at all rates of application.4. In eleven of the experiments, broadcast applications of two or more of the four nitrogen fertilizers were compared. All sources gave similar mean yields.5. There was a slightly smaller yield from combine drilling than from broadcasting ammonium sulphate and ammonium nitrate, and a markedly smaller yield from calcium nitrate and urea.

Soil moisture and relative humidity effects during postdiapause on the emergence of western cherry fruit fly (Diptera: Tephritidae)

2013 ◽  
Vol 145 (3) ◽  
pp. 317-326 ◽  
Author(s):  
Wee L. Yee
Keyword(s):  
United States Of America ◽  
Adult Emergence ◽  
Fruit Fly ◽  
Washington State ◽  
Humidity Effects ◽  
Wide Range ◽  
Loam Soil ◽  
Dry Soil ◽  
Moisture Conditions ◽  
High Emergence

AbstractPupae of western cherry fruit fly, Rhagoletis indifferens Curran (Diptera: Tephritidae), from Kennewick and Roslyn in Washington State, United States of America, were subjected to different soil and air moisture conditions to test the hypotheses that adult emergence from dry and moist soil is similar and is greater and occurs earlier at high than low relative humidities (RHs). Adult fly emergence from 0–57% saturated loam soil did not differ in Kennewick (64.8–75.1%) and Roslyn (81.7–86.6%) populations. Emergence did not occur from 76% saturated loam soil. In a RH experiment using dry soil, emergence of Kennewick flies was highest at 97% RH (76.8%), intermediate at 12–74% RH (66.4–69.6%), and lowest at 3% RH (58.0%). Emergence of Roslyn flies was higher at 97% RH (85.6%) than 3% (69.2%) and 12% RH (74.3%), but it did not differ from that at 33% (76.9%) and 74% RH (79.4%). Flies emerged ∼2–3 days earlier at 97% RH than at 3–12% RH. An unnaturally low RH of 3% caused more flies to be deformed than higher RHs. High emergence of R. indifferens in dry and moist conditions likely contributes to its presence in a wide range of native and nonnative habitats.

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