Some observations on the influence of nitrogen fertilizer applied at seeding on the nitrogen content of the wheat grain

1964 ◽  
Vol 4 (15) ◽  
pp. 345 ◽  
Author(s):  
JS Russell
Keyword(s):  
Nitrogen Content ◽  
Nitrogen Fertilizer ◽  
Climatic Factors ◽  
Yield Response ◽  
Wheat Grain ◽  
Nitrogen Yield ◽  
Grain Nitrogen ◽  
Nitrogen Percentage

The effect of nitrogen fertilizer applied at seeding on the nitrogen content of wheat grain was studied in 63 experiments during the six seasons 1956-1961. The overall effect of fertilizer was to increase grain nitrogen percentage, but there were situations where no change and even decreases in grain nitrogen percentage were found. The magnitude of the changes due to nitrogen fertilizer was small in relation to change brought about by climatic factors. Both the change in nitrogen content and nitrogen yield from applied fertilizer showed a relation to the nitrogen content of grain from unfertilized plants. Significant differences between varieties were found for nitrogen yield response but not for nitrogen content response.

Nitrogen fertilizer and wheat in a semi-arid environment. 2. Climatic factors affecting response

1968 ◽  
Vol 8 (31) ◽  
pp. 223 ◽  
Author(s):  
JS Russell
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilizer ◽  
Climatic Factors ◽  
Yield Response ◽  
Straw Yield ◽  
Growing Period ◽  
Positive Effects ◽  
Nitrogen Yield ◽  
Grain Nitrogen ◽  
Applied Nitrogen

The response of Gabo wheat to nitrogen fertilizer at 52 sites in the wheat growing areas of South Australia during 1956-61 was examined in relation to climatic factors by a stepwise multiple regression analysis using a computer. The ten dependent variables were the linear and quadratic coefficients obtained by fitting orthogonal polynomials to response curves of various parameters (grain yield, grain + straw yield, harvest index, grain nitrogen percentage, and grain nitrogen yield) to applied nitrogen at each of the 52 sites. The 23 independent variables were the amounts of rainfall and evaporation during the growing period, maximum and minimum temperatures and estimates of high temperature stress during spring and amount of rainfall immediately after sowing at each site. The climatic variables examined explained 46.5, 64.3, and 64.3 per cent of the variation in the response to nitrogen fertilizer of grain yield, grain + straw yield, and grain nitrogen yield respectively. The positive effects of increasing amounts of winter rainfall on yield response to applied nitrogen were marked. On the other hand, the negative effects of high maximum temperatures in the latter part of the growing period, particularly during October, on yield response were also evident.

Nitrogen content of wheat grain as as indication of potential yield response to nitrogen fertilizer

1963 ◽  
Vol 3 (11) ◽  
pp. 319 ◽  
Author(s):  
JS Russell
Keyword(s):  
Grain Yield ◽  
Nitrogen Content ◽  
Nitrogen Fertilizer ◽  
Cultural Practices ◽  
South Australia ◽  
Yield Response ◽  
Regression Equations ◽  
Wheat Grain ◽  
Potential Yield ◽  
Grain Nitrogen

Examination of results from a large number of experiments in the wheat growing areas of South Australia has shown a relation between grain yield response to nitrogen fertilizer and both grain nitrogen percentage and the ratio. (Yield of grain)/(Amount of nitrogen in grain and straw) of corresponding unfertilized wheat plants. With Gabo, large yield responses to nitrogen fertilizer were associated with grain nitrogen percentages of less than 2.0 per cent N (9.9 per cent protein). Above 2.3 per cent N (11.3 per cent protein) positive responses to nitrogen were small and some negative responses were found. Similar overall trend were shorn by Insignia 49, Sabre and Quadrat. Exponential regression equations were calculated for Gabo allowing prediction of grain yield response at rates up to 46 lb fertilizer N an acre under conditions which result in grain protein contents of 7.5 to 16 per cent. Most profitable rates of nitrogen fertilizer application were also calculated for several different fertilizer-grain price levels. Possible value of the nitrogen content of wheat grain in the selection of regions, soil types, and cultural practices where nitrogen fertilizer may be used is discussed.

The effect of fallowing on yield of wheat. III. The effect on grain nitrogen content

1978 ◽  
Vol 29 (4) ◽  
pp. 685
Author(s):  
RJ French
Keyword(s):  
Water Supply ◽  
Nitrogen Content ◽  
Nitrogen Supply ◽  
Wheat Grain ◽  
Dominant Effect ◽  
Nitrogenous Fertilizer ◽  
Growing Seasons ◽  
Australian Wheat ◽  
Grain Nitrogen ◽  
Nitrogen Percentage

The nitrogen content of wheat grain in the South Australian wheat-belt is related to water and nitrogen supply. Grain nitrogen decreased with increasing water supply; it tended therefore to be less in wet seasons, less under fallow because of additional stored water and less on fine-textured soils which also provided more water. Grain nitrogen increased as the nitrogen supply was increased either as additional nitrate due to fallow or as nitrogenous fertilizer. The effect of fallow on grain nitrogen varied with the season. In dry growing seasons, the grain nitrogen percentage was usually higher on the non-fallow treatment, because of the dominant effect of a lesser water supply. In moist growing seasons, the grain nitrogen percentage was higher on the fallow because of the dominant effect of a better nitrogen supply. Since rainfall is unpredictable, the net effect of fallowing on the grain nitrogen percentage is also unpredictable.

Sorghum — peanut crop sequences at Katherine, N.T.

1961 ◽  
Vol 1 (3) ◽  
pp. 144
Author(s):  
LJ Phillips ◽  
MJT Norman
Keyword(s):  
Nitrogen Content ◽  
Nitrogen Fertilizer ◽  
Grain Sorghum ◽  
Clay Loam ◽  
Fertilizer Nitrogen ◽  
Preceding Crop ◽  
Nitrogen Yield ◽  
Peanut Crop ◽  
Sorghum Grain ◽  
Crop Sequence

Between 1957-58 and 1960-61, a crop sequence experiment with grain sorghum and peanuts with and without nitrogen fertilizer was carried out on Tippera clay loam at Katherine, N.T. Neither crop was influenced by the crop grown two years before it. Peanuts showed no response to preceding crop or to nitrogen fertilizer. Sorghum grain yields were 77 per cent higher after peanuts than after sorghum, and sorghum stubble yields 56 per cent higher. Nitrogen fertilizer increased sorghum grain and stubble yield when the crop followed sorghum, but not when the crop followed peanuts. Nitrogen content of sorghum grain was higher after peanuts than after sorghum, and was also increased slightly by nitrogen fertilizer. Nitrogen yield of sorghum grain was almost twice as high in crops following peanuts than in crops following sorghum. Nitrogen fertilizer increased nitrogen yield of sorghum grain when the crop followed sorghum, but not when the crop followed peanuts.

The effect of cropping after medic and non-medic pastures on total soil nitrogen, and on the grain yield and nitrogen content of wheat

1980 ◽  
Vol 20 (103) ◽  
pp. 220 ◽  
Author(s):  
CL Tuohey ◽  
AD Robson
Keyword(s):  
Seasonal Variation ◽  
Grain Yield ◽  
Nitrogen Content ◽  
Soil Nitrogen ◽  
Yield Response ◽  
Strongly Correlated ◽  
Nitrogen Response ◽  
Total Soil ◽  
Grain Nitrogen ◽  
Total Soil Nitrogen

The effect of medic and non-medic pastures on grain yield and nitrogen content of wheat was studied over 15 seasons on a friable grey clay in the Wimmera. The effects of length and type of pasture ley on grain yield and nitrogen content were closely related to the effects of these treatments on total soil nitrogen. Grain yield was not increased in any season by increasing total soil nitrogen beyond 0.1 10%. The grain yield response to increased total soil nitrogen varied markedly with seasons and most of the variation could be accounted for by variation in November rainfall; grain yield response was greater in years of higher November rainfall. Grain nitrogen content increased with increasing total soil nitrogen over the range studied (0.078% to 0.1 28%). Seasonal variation in grain nitrogen response to total soil nitrogen was mainly associated with variation in September and November rainfall. Higher September rainfall increased the response and higher November rainfall decreased it. The decline in total soil nitrogen that occurred with cropping was strongly correlated with the level of total soil nitrogen before cropping.

YIELD RESPONSE OF CONQUEST BARLEY AS AFFECTED BY NITROGEN FERTILIZER AND SOIL TESTS FOR AMMONIUM- AND NITRATE-NITROGEN

1973 ◽  
Vol 53 (2) ◽  
pp. 163-168 ◽  
Author(s):  
W. F. NUTTALL
Keyword(s):  
Nitrogen Fertilizer ◽  
Nitrate Nitrogen ◽  
Climatic Factors ◽  
Phosphate Fertilizer ◽  
Nitrogen Fertilizers ◽  
Yield Response ◽  
Regression Analyses ◽  
Soil Tests ◽  
Quadratic Equations ◽  
Fertilizer Rates

Yield response of Conquest barley to nitrogen fertilizer applied at 22, 45, 67, and 134 kg/ha with and without 20 kg P/ha were significantly related by regression analyses to ammonium- and to nitrate-nitrogen in soils of northeastern Saskatchewan. Both linear and quadratic equations obtained from the regression analyses were used to develop tables estimating yield response of barley related to nitrogen fertilizer rates and soil tests for ammonium- and nitrate-nitrogen. The results indicated that a greater response to nitrogen fertilizer occurred with a given amount of ammonium- plus nitrate-nitrogen than with the same amount of nitrate-nitrogen alone. Phosphate fertilizer also significantly increased yield response to nitrogen fertilizers. Confidence intervals showed that wide variation could be expected in yield response to nitrogen fertilizers. Variation is attributed to differences in soil type, soil moisture, and climatic factors among experimental sites.

EFFECTS OF COMBINED APPLICATIONS OF TRIALLATE OR TRIFLURALIN WITH SOLUTION NITROGEN ON WHEAT, WILD OATS AND GREEN FOXTAIL

1977 ◽  
Vol 57 (2) ◽  
pp. 479-484 ◽  
Author(s):  
J. R. MOYER ◽  
R. D. DRYDEN
Keyword(s):  
Triticum Aestivum ◽  
Nitrogen Content ◽  
Nitrogen Fertilizer ◽  
Good Control ◽  
Triticum Aestivum L ◽  
Avena Fatua ◽  
Setaria Viridis ◽  
Wheat Grain ◽  
Wild Oats ◽  
Green Foxtail

Tank mixtures of solution nitrogen, triallate [S-(2,3,3-trichloroallyl)diisopropyl-thiocarbamate] and/or trifluralin [α,α,α,-trifluro-2, 6-dinitro-N, N-dipropyl-p-toluidine] were evaluated for the control of wild oats (Avena fatua L.) and/or green foxtail (Setaria viridis (L.) Beauv.). The response of wheat (Triticum aestivum L.) cv. Neepawa to solution nitrogen applied alone or in combination with triallate and/or trifluralin were evaluated. Good control of wild oats and green foxtail was obtained with a tank mixture of solution nitrogen, trifluralin at 1.38 kg/ha, and triallate at 1.65 kg/ha. Tank mixtures of triallate at 1.65 kg/ha with solution nitrogen controlled wild oats. Trifluralin at 1.38 kg/ha with solution nitrogen controlled wild oats and green foxtail. Control of green foxtail and wild oats resulted in increased wheat yields, higher nitrogen content in wheat grain, and a more efficient use of applied nitrogen fertilizer. The response of wheat to nitrogen was similar when nitrogen was applied in tank mixes with herbicides or with water to hand-weeded plots.

Fertilization of spring barley by combination of pig slurry and mineral nitrogen fertilizer

1996 ◽  
Vol 127 (2) ◽  
pp. 151-159 ◽  
Author(s):  
J. Petersen
Keyword(s):  
Nitrogen Content ◽  
Nitrogen Uptake ◽  
Nitrogen Fertilizer ◽  
Field Experiments ◽  
Spring Barley ◽  
Fertilizer Application ◽  
Mineral Nitrogen ◽  
Nitrogen Efficiency ◽  
Yield Response ◽  
Pig Slurry

SUMMARYField experiments at Askov and Lundgaard Experimental Stations, Denmark, were carried out in 1987–91. Winter and spring applications of pig slurry at two application rates and an unfertilized treatment were combined with three rates of mineral nitrogen fertilizer; 15 treatment in all. Grain and straw yield, nitrogen content and nitrogen uptake of spring barley were measured at harvest. All main effects were significant, resulting in increasing yield and nitrogen uptake both when increasing the rate of mineral nitrogen fertilizer and slurry, and when slurry was applied in spring rather than in winter. The nitrogen content of the barley was affected by mineral nitrogen fertilizer application, and by the rate of slurry. The nitrogen efficiency of applied ammonia-N in the pig slurry was estimated by a quadratic polynomial yield response function and expressed relative to a reference function based on the application of mineral nitrogen fertilizer. The efficiency was estimated at 10 for spring-applied pig slurry. The value for winter-applied pig slurry was lower (0·6) and more variable. The efficiency of ammonia-N in spring-applied pig slurry decreased by 0·4/100 kg N/ha when supplementary mineral nitrogen fertilizer was applied at the same time.

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