Influence of Planting Date, Nitrogen Rate, and Harvest Date on Yield and Sucrose Concentration of Fall-Planted Sugarbeets in Central Arizona

1978 ◽  
Vol 20 (1) ◽  
pp. 25-32 ◽  
Author(s):  
J. M. Nelson
Keyword(s):  
Sucrose Concentration ◽  
Planting Date ◽  
Harvest Date ◽  
Nitrogen Rate ◽  
Central Arizona

Planting Date and Nitrogen Rate Effects on Spring Malting Barley

1990 ◽  
Vol 82 (6) ◽  
pp. 1083-1088 ◽  
Author(s):  
Joseph G. Lauer ◽  
Jay R. Partridge
Keyword(s):  
Planting Date ◽  
Malting Barley ◽  
Nitrogen Rate ◽  
Rate Effects

Oil Content and Saturated Fatty Acids in Sunflower as a Function of Planting Date, Nitrogen Rate, and Hybrid

2009 ◽  
Vol 101 (4) ◽  
pp. 1003-1011 ◽  
Author(s):  
Valtcho D. Zheljazkov ◽  
Brady A. Vick ◽  
Brian S. Baldwin ◽  
Normie Buehring ◽  
Tess Astatkie ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Oil Content ◽  
Saturated Fatty Acids ◽  
Planting Date ◽  
Nitrogen Rate

scholarly journals Forecasting the Harvest Date and Yield of Sweet Corn by Complex Regression Models

1993 ◽  
Vol 118 (4) ◽  
pp. 450-455 ◽  
Author(s):  
L.W. Lass ◽  
R.H. Callihan ◽  
D.O. Everson
Keyword(s):  
Linear Regression ◽  
Sweet Corn ◽  
Forecast Accuracy ◽  
Planting Date ◽  
Harvest Date ◽  
Coefficient Of Determination ◽  
Growing Degree Days ◽  
Simple Linear Regression ◽  
Degree Days ◽  
Independent Variables

Predicting sweet corn (Zea mays var. rugosa Bonaf.) harvest dates based on simple linear regression has failed to provide planting schedules that result in the uniform delivery of raw product to processing plants. Adjusting for the date that the field was at 80% silk in one model improved the forecast accuracy if year, field location, cultivar, soil albedo, herbicide family used, kernel moisture, and planting date were used as independent variables. Among predictive models, forecasting the Julian harvest date had the highest correlation with independent variables (R2 = 0.943) and the lowest coefficient of variation (cv = 1.31%). In a model predicting growing-degree days between planting date and harvest, R2 (coefficient of determination) = 0.85 and cv = 2.79%. In the model predicting sunlight hours between planting and harvest, R2 = 0.88 and cv = 6.41%. Predicting the Julian harvest date using several independent variables was more accurate than other models using a simple linear regression based on growing-degree days when compared to actual harvest time.

scholarly journals A Heat Unit Accumulation Method for Predicting Cucumber Harvest Date

1996 ◽  
Vol 6 (1) ◽  
pp. 27-30 ◽  
Author(s):  
Katharine B. Perry ◽  
Todd C. Wehner
Keyword(s):  
North Carolina ◽  
Production Systems ◽  
Planting Date ◽  
Harvest Date ◽  
Daily Maximum ◽  
Base Temperature ◽  
Harvest Dates ◽  
The Difference ◽  
Maximum Temperatures ◽  
Accumulation Method

The use of a previously developed model for predicting harvest date in cucumber production systems is described. In previous research we developed a new method using daily maximum temperatures in heat units to predict cucumber harvest dates. This method sums, from planting to harvest, the daily maximum minus a base temperature of 60F (15.5 C), but if the maximum is >90F (32C) it is replaced by 90F minus the difference between the maximum and 90F. This method was more accurate than counting days to harvest in predicting cucumber harvest in North Carolina, even when harvest was predicted using 5 years of experience for a particular location and planting date.

scholarly journals Effect of Planting Date and Cultivar Maturity in Edamame Quality and Harvest Window

2021 ◽  
Vol 11 ◽  
Author(s):  
David Moseley ◽  
Marcos Paulo da Silva ◽  
Leandro Mozzoni ◽  
Moldir Orazaly ◽  
Liliana Florez-Palacios ◽  
...  
Keyword(s):  
The United States ◽  
Planting Date ◽  
Harvest Date ◽  
Timely Manner ◽  
Phenological Stages ◽  
Planting Dates ◽  
Harvest Dates ◽  
Key Factor ◽  
Harvest Strategy ◽  
The Impact

Edamame is a food-grade soybean [Glycine max (L.) Merr.] that is harvested immature between the R6 and R7 reproductive stages. To be labeled as a premium product, the edamame market demands large pod size and intense green color. A staggered harvest season is critical for the commercial industry to post-harvest process the crop in a timely manner. Currently, there is little information to assist in predicting the optimum time to harvest edamame when the pods are at their collective largest size and greenest color. The objectives of this study were to assess the impact of cultivar, planting date, and harvest date on edamame color, pod weight, and a newly minted Edamame Harvest Quality Index combining both aforementioned factors. And to predict edamame harvest quality based on phenological stages, thermal units, and planting dates. We observed that pod color and weight depended on the cultivar, planting date, and harvest date combination. Our results also indicated that edamame quality is increased with delayed planting dates and that quality was dependent on harvest date with a quadratic negative response to delaying harvest. Maximum quality depended on cultivar and planting and harvest dates, but it remained stable for an interval of 18–27 days around the peak. Finally, we observed that the number of days between R1 and harvest was consistently identified as a key factor driving edamame quality by both stepwise regression and neural network analysis. These research results will help define a planting and harvest strategy for edamame production in Arkansas and the United States Mid-South.

scholarly journals Planting Date and Cultivar Affect Melon Quality and Productivity

HortScience ◽  
2006 ◽  
Vol 41 (7) ◽  
pp. 1559-1564 ◽  
Author(s):  
Robert J. Dufault ◽  
Ahmet Korkmaz ◽  
Brian K. Ward ◽  
Richard L. Hassell
Keyword(s):  
South Carolina ◽  
Cucumis Melo ◽  
Planting Date ◽  
Harvest Date ◽  
Internal Quality ◽  
Planting Dates ◽  
Late Planting ◽  
Potential Market ◽  
Honeydew Melon

Extending the production season of melons (Cucumis melo L.) by using very early and late planting dates outside the range that is commercially recommended will increase the likelihood of developing a stronger melon industry in South Carolina. The objective of this study was to determine if early (February) transplanted melons or later (June through July) planting dates are effective in extending the production season of acceptable yields with good internal quality of the melon cultivars: Athena, Eclipse, and Sugar Bowl and Tesoro Dulce (a honeydew melon). Melons were transplanted in Charleston, S.C., in 1998, 1999, and 2000 on 12 and 26 Feb., 12 and 26 Mar., 9 and 23 Apr., 7 and 21 May, 4 and 18 June, and 2 July and required 130, 113, 105, 88, 79, 70, 64, 60, 60, 59, and 56 days from field transplanting to reach mean melon harvest date, respectively. Stands were reduced 67%, 41%, and 22% in the 12 and 26 Feb. and 12 Mar. planting dates, respectively, in contrast to the 26 Mar. planting date but ≤15% in all other planting dates. Planting in February had no earliness advantage because the 12 and 26 Feb. and 12 and 26 Mar. planting dates, all reached mean melon harvest from 19 to 23 June. Comparing the marketable number of melons produced per plot (averaged over cultivar) of the standard planting dates of 12 and 26 Mar. indicated decreases of 21%, 32%, 36%, 36%, 57%, 57%, and 54%, respectively with the planting dates of 9 and 23 Apr., 7 and 21 May, 4 and 18 June, and 2 July. The most productive cultivar of all was `Eclipse', which yielded significantly more melons per plot in all 11 planting dates followed by `Athena' (in 8 of 11 planting dates), `Tesoro Dulce' (7 of 11 planting dates), and `Sugar Bowl' (2 of 11 planting dates). In our study, any planting date with melon quality less than the USDA standard of “good internal quality” or better (Brix ≥9.0) was considered unacceptable because of potential market rejection. Therefore, the earliest recommended planting date with acceptable yield and “good internal quality” was 12 Mar. for all cultivars; the latest planting dates for `Athena', `Eclipse', `Tesoro Dulce', and `Sugar Bowl' were 4 June, 18 June, 7 May, and 9 Apr., respectively. With these recommendations, the harvest season of melons lasted 40 days from 24 June to 3 Aug. for these four cultivars, which extended the production season an additional 2 weeks longer than the harvest date of last recommended 21 May planting date.

scholarly journals EFFECT OF PLANTING DATE, NITROGEN RATE, AND HYBRID ON SUNFLOWER

2012 ◽  
Vol 35 (14) ◽  
pp. 2198-2210 ◽  
Author(s):  
Valtcho D. Zheljazkov ◽  
Brady A. Vick ◽  
Brian S. Baldwin ◽  
Normie Buehring ◽  
Tess Astatkie ◽  
...  
Keyword(s):  
Planting Date ◽  
Nitrogen Rate
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