scholarly journals Weather effects on corn response to in-season nitrogen rates

2013 ◽  
Vol 93 (3) ◽  
pp. 407-417 ◽  
Author(s):  
M. Xie ◽  
N. Tremblay ◽  
G. Tremblay ◽  
G. Bourgeois ◽  
M. Y. Bouroubi ◽  
...  
Keyword(s):  
Meta Analysis ◽  
Yield Response ◽  
Corn Yield ◽  
Humid Climate ◽  
Nitrogen Rate ◽  
Nitrogen Response ◽  
Weather Effects ◽  
Nitrogen Rates ◽  
The Impact ◽  
Low Precipitation

Xie, M., Tremblay, N., Tremblay, G., Bourgeois, G., Bouroubi, M. Y. and Wei, Z. 2013. Weather effects on corn response to in-season nitrogen rates. Can. J. Plant Sci. 93: 407–417. The response of corn yield to in-season nitrogen rate (ISNR) fertilizer applications in a temperate humid climate is conditioned to a great extent by prevailing weather conditions, which affect nitrogen use efficiency and raise the level of uncertainty for making management decisions. A better understanding of the effects of temperature, expressed as accumulated corn heat units (CHU), and precipitation would help to ensure that a “closer-to-optimal” nitrogen rate is supplied at side-dressing. A meta-analysis was performed using a database of nitrogen response trials conducted from 1997 to 2008 in 60 locations in the corn grain production area of Québec, in conjunction with a weather database. Meta-analysis is a statistical procedure for combining results from a series of studies that is used in many fields of research. It is used to assess treatment effect (also called effect size) in a group of studies or experiments. Corn yield response to ISNR was negatively correlated with overall CHU accumulation, but positively correlated with CHU accumulation before side-dressing. Responses also showed a stronger relationship with cumulative precipitation (PPT) before side-dressing than after side-dressing. High and evenly distributed precipitation before side-dressing tended to increase responses to ISNR. It can be concluded that low CHU, low precipitation and low precipitation evenness before side-dressing reduce the impact of ISNR on corn yield.

A comparison of the yield responses of four grasses to a wide range of nitrogen application rates

1985 ◽  
Vol 105 (2) ◽  
pp. 381-387 ◽  
Author(s):  
D. Reid
Keyword(s):  
Dry Matter ◽  
Growth Curves ◽  
Yield Response ◽  
Dry Matter Yield ◽  
Meadow Fescue ◽  
Nitrogen Rate ◽  
Yield Data ◽  
Wide Range ◽  
Yield Responses ◽  
Nitrogen Rates

SUMMARYThe yield results are reported for an experiment in which 21 rates of nitrogen fertilizer were applied on pure-sown swards of four grasses, S. 24 and Barvestra perennial ryegrass, S. 37 cocksfoot and S. 53 meadow fescue. Growth curves fitted to the herbage yield data for each grass in each year are presented. On average the total dry-matter yield curves for the two ryegrasses were similar to one another, but showed a slightly smaller response to nitrogen rates below 300 kg/ha than did S. 23 ryegrass in an earlier experiment, and a more rapid decrease in response at higher rates. S. 37 cocksfoot had a similar dry-matter yield response to the ryegrasses at the low nitrogen rates, but the response decreased more rapidly at nitrogen rates over 250 kg/ha. The dry-matter yield response of S. 53 fescue decreased even more rapidly with nitrogen rates over 200 kg/ha. The mean estimates of the optimal nitrogen rate for each of the four grasses, i.e. the nitrogen rate at which the dry-matter response had decreased to 10 kg/kg N, was 380, 372, 357 and 327 kg N/ha for S. 24, Barvestra, S. 37 and S. 53 respectively, compared with 409 kg/ha for S. 23 ryegrass in the earlier experiment.

scholarly journals Economic Analysis of Nitrogen Rate on Vine Production and Fruit Yield of Pruned Cranberry Beds

2009 ◽  
Vol 19 (3) ◽  
pp. 572-579 ◽  
Author(s):  
Hilary A. Sandler ◽  
Carolyn J. DeMoranville
Keyword(s):  
Economic Analysis ◽  
Fruit Yield ◽  
Vaccinium Macrocarpon ◽  
Net Income ◽  
Management Options ◽  
Nitrogen Rate ◽  
High Severity ◽  
Nitrogen Treatments ◽  
Nitrogen Rates ◽  
The Impact

Four nitrogen rates (0, 50, 100, and 150 lb/acre) and four spring pruning severities (none, low, medium, and high) were applied annually in all combinations at two commercial ‘Stevens’ cranberry (Vaccinium macrocarpon) farms in southeastern Massachusetts for 4 years (consecutive). Because runners generated from pruning vines are used to establish new plantings, determining the vine weight generated from each treatment combination was an important criterion for the economic analysis; these data were collected each spring. Mean pruning weight across nitrogen treatments at both locations, collected from the low, medium, and high severity pruning treatments, was 0.17, 0.35, and 0.54 ton/acre, respectively. Economic analysis of the data indicated that nitrogen rate largely determined net income revenues; pruning severity did not significantly affect net income. Nitrogen rates of 100 and 150 lb/acre led to declines in fruit yield and ultimately, in net income. Annual removal of 0.5 ton of vines per acre while applying 50 lb/acre nitrogen did not negatively impact net income values over the 4-year study period. When deciding on horticultural management options for vine propagation, growers should consider the impact of their fertilizer program on fruit yield.

Nitrogen requirements of sugar beet in relation to harvesting date

1976 ◽  
Vol 86 (2) ◽  
pp. 373-377 ◽  
Author(s):  
M. R. J. Holmes ◽  
J. R. Devine ◽  
F. W. Dunnett
Keyword(s):  
Sugar Beet ◽  
Nitrogen Fertilizer ◽  
Field Experiments ◽  
Sugar Content ◽  
Sugar Yield ◽  
Yield Response ◽  
Nitrogen Rate ◽  
Nitrogen Response ◽  
Oolitic Limestone ◽  
Early Harvest

SummarySeven field experiments were made on the effect of two harvesting dates on the nitrogen requirements of sugar beet. All were on Rauceby series soils overlying oolitic limestone in Lincolnshire.Nitrogen fertilizer increased sugar yield in all experiments, and yield was considerably higher at the mid-December harvest than in early October. On average, the sugar-yield response to nitrogen was greater at the late harvest, and the requirement for nitrogen was about 45 kg/ha higher then than at the early harvest. Sugar content was depressed less at the late harvest than at the early by increasing nitrogen rate.These results suggest that farmers should apply more nitrogen to fields that they plan to harvest late than to early-harvested fields; they also have implications for the conduct and interpretation of nitrogen response experiments on sugar beet.

scholarly journals Modeling Long-Term Corn Yield Response to Nitrogen Rate and Crop Rotation

2016 ◽  
Vol 7 ◽  
Author(s):  
Laila A. Puntel ◽  
John E. Sawyer ◽  
Daniel W. Barker ◽  
Ranae Dietzel ◽  
Hanna Poffenbarger ◽  
...  
Keyword(s):  
Crop Rotation ◽  
Yield Response ◽  
Corn Yield ◽  
Nitrogen Rate

Corn Yield Response to Nitrogen Rate and Timing in Sandy Irrigated Soils

2005 ◽  
Vol 97 (4) ◽  
pp. 1230-1238 ◽  
Author(s):  
Ronald J. Gehl ◽  
John P. Schmidt ◽  
Larry D. Maddux ◽  
W. Barney Gordon
Keyword(s):  
Yield Response ◽  
Corn Yield ◽  
Nitrogen Rate ◽  
Irrigated Soils

Comparison of harvest techniques for corn field demonstrations

1989 ◽  
Vol 4 (2) ◽  
pp. 59-64 ◽  
Author(s):  
Charles A. Shapiro ◽  
William L. Kranz ◽  
Anne M. Parkhurst
Keyword(s):  
Yield Response ◽  
Field Variation ◽  
Experimental Variation ◽  
Statistical Precision ◽  
Small Hand ◽  
Important Means ◽  
The Difference ◽  
Nitrogen Rates ◽  
On Farm ◽  
The Impact

AbstractOn-farm field demonstrations provide a useful method of technology transfer for researchers and extension specialists, and the proponents of alternative agriculture have adopted on-farm experimentation as an important means to establish the value of sustainable methods. For on-farm research long narrow strips harvested by machine are often employed in place of small hand-harvested plots commonly used at research facilities. The use of this approach, however, could bring the methodology into question if field variation should make determination of statistical differences difficult. Analysis of harvest data from ten irrigated and four dryland site-years for small hand-harvested corn plots and for machine-harvested long narrow strips was conducted to determine the impact of sampling method upon experimental variation. Analyses of variance indicated that six of the ten machine-harvested irrigated sites had significant yield response to applied nitrogen while only one of the ten hand-harvested sites exhibited significant nitrogen effects (P ≤ 0.10). The difference in statistical precision was not a result of increased range in yields, but rather of more consistent yields for each treatment. An economic analysis was performed, and the results indicated that optimum nitrogen rates depended on corn and nitrogen price ratios. When 1989 corn and nitrogen prices were used, the calculated marginal profit levels between the reduced nitrogen and recommended nitrogen rate ranged from $8.92 to -$8.14 per ha. For the irrigated sites, when experimental variation (F-test of total sum of squares) was compared by harvest method, hand harvest had significantly greater variation than machine harvest in five experiments. Machine harvest was significantly more variable in one comparison. Coefficients of variation for machine harvest were less than for hand harvest in nine of ten irrigated experiments. For the dryland sites, differences between harvest methods were significant in one of four experiments. These data suggest that under certain conditions machine-harvested long narrow strips provide more accurate estimates of treatment differences than do small hand-harvested plots despite potential differences in soil texture, soil fertility, or available soil water.

Corn yield response to sub-surface banded starter fertilizer in the U.S.: A meta-analysis

2020 ◽  
Vol 254 ◽  
pp. 107834 ◽  
Author(s):  
Daniel J. Quinn ◽  
Chad D. Lee ◽  
Hanna J. Poffenbarger
Keyword(s):  
Meta Analysis ◽  
Yield Response ◽  
Corn Yield ◽  
Starter Fertilizer ◽  
The U.S

Nitrogen requirement of sugar beet

1976 ◽  
Vol 87 (3) ◽  
pp. 549-558 ◽  
Author(s):  
M. R. J. Holmes ◽  
J. R. Devine
Keyword(s):  
Sugar Beet ◽  
Field Experiments ◽  
Summer Rainfall ◽  
Sugar Yield ◽  
Yield Response ◽  
Nitrogen Response ◽  
Nitrogen Requirement ◽  
Nitrogen Rates ◽  
Very High ◽  
Made In

SummarySeventy-four field experiments on the nitrogen requirement of sugar beet were made in eastern England in. 1966 to 1974. Considerable differences in sugar yield response to nitrogen were found between the six soil types used, and these differences were found (on five of the six soils) to be related to sugar yield. Nitrogen response was large on chalk and limestone soils in Lincolnshire, intermediate on East Anglian boulder clays and least on East Anglian chalk and light drift soils. On the lighter soils (limestones, East Anglian chalks and light drifts) nitrogen response was greater with high summer rainfall than with low. Fenland silt soils were very high yielding, but nitrogen response was moderate.Optimum nitrogen rates differed between soils, in the range 100 kg/ha on East Anglian chalks and light drifts to 180–200 kg/ha on Lincolnshire chalks and limestones.

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