Site-specific modeling of corn yield in the SE coastal plain

2000 ◽  
Vol 64 (3) ◽  
pp. 189-207 ◽  
Author(s):  
E.J. Sadler ◽  
B.K. Gerwig ◽  
D.E. Evans ◽  
W.J. Busscher ◽  
P.J. Bauer
Keyword(s):  
Coastal Plain ◽  
Corn Yield ◽  
Site Specific ◽  
Specific Modeling

Simulation of Corn Yield by a Water Management Model for a Coastal Plain Soil in Virginia

1988 ◽  
Vol 31 (3) ◽  
pp. 0734-0742 ◽  
Author(s):  
P. C. McMahon ◽  
S. Mostaghimi ◽  
F. S. Wright
Keyword(s):  
Water Management ◽  
Coastal Plain ◽  
Management Model ◽  
Corn Yield ◽  
Coastal Plain Soil

Evaluating Nitrogen Management for Corn Production with Supplemental Irrigation on Sandy Soils of the Southeastern Coastal Plain Region of the U.S.

2020 ◽  
Vol 63 (3) ◽  
pp. 731-740
Author(s):  
Dagbegnon Clement Sohoulande Djebou ◽  
Liwang Ma ◽  
Ariel A. Szogi ◽  
Gilbert C. Sigua ◽  
Kenneth C. Stone ◽  
...  
Keyword(s):  
Coastal Plain ◽  
Soil Variability ◽  
N Leaching ◽  
Corn Yield ◽  
Soil Series ◽  
Field Scale ◽  
Corn Production ◽  
N Application ◽  
Supplemental Irrigation ◽  
N Management

Highlights This study addressed the inclusion of field-scale soil variability in nitrogen (N) management for corn production. RZWQM2 was calibrated for corn yield and N dynamics on four sandy soil series under supplemental irrigation. Multi-year simulations of corn production under high and low N application rates were analyzed. Results showed room to reduce N use and N leaching without affecting corn production on Coastal Plain sandy soils. Abstract. Nitrogen (N) fertilization contributes significantly to maintain high yields in corn (Zea mays L.) production. In the Southeastern Coastal Plain of the U.S. where soils are sandy with poor water and nutrient holding capacity, a fraction of the N applied to corn fields is often leached from the root zone and becomes unavailable to plants. As these soils belong to various taxonomic classes, research has shown significant corn yield differences among soil series. However, few studies have focused on integrating field-scale soil variability, N leaching, and corn production. To address this knowledge gap, this study used the Root Zone Water Quality Model (RZWQM2) to simulate different N management scenarios in corn production for four sandy soil series under supplemental irrigation. The calibrated model was used to simulate nine consecutive years of corn production under four N management scenarios, including two high rates of N application (rate A = 224 kg N ha-1 with 25 kg N ha-1 at preplant; rate A' = 224 kg N ha-1 without preplant N), and two low rates of N application (rate B = 157 kg N ha-1 with 25 kg N ha-1 at preplant; rate B' = 157 kg N ha-1 without preplant N). Simulation results showed that without preplant N application, N leaching was reduced by up to 17% with no significant impact on corn yield, depending on the soil series. Hence, consideration of field-scale soil variability could help improve N management by reducing N use and N leaching without impacting corn production. Keywords: Corn yield components, Growing season, Modeling, Nitrogen dynamics, RZWQM2, Soil variability.

SOIL EROSION AND CORN YIELD IN ONTARIO. I. FIELD EVALUATION

1987 ◽  
Vol 67 (4) ◽  
pp. 731-745 ◽  
Author(s):  
L. A. BATTISTON ◽  
M. H. MILLER ◽  
I. J. SHELTON
Keyword(s):  
Zea Mays L ◽  
Nutrient Deficiency ◽  
Field Evaluation ◽  
Aerial Photographs ◽  
Specific Yield ◽  
Yield Reduction ◽  
Corn Yield ◽  
Site Specific ◽  
The Impact ◽  
Water Holding

Yield of corn (Zea mays L.) was measured at eight sites in 1982 and nine sites in 1983 on areas in farm fields exhibiting differing degrees of past erosion. Yield was also measured on depositional areas in some fields. Yield on depositional areas was, on average, marginally greater than on noneroded areas. Yield on severely eroded areas (all or most of original solum lost) ranged from 16 to 80% of that on noneroded areas with an average of 59%. There was little or no reduction in yield until the depth to Ck had been reduced to almost 50% of that on the noneroded profile. With further reductions in depth to Ck, yields declined rapidly on most sites. The primary cause of yield reduction varied from site to site and included reduced stand and seedling vigor due to a poor seedbed condition, nutrient deficiency and reduced available water holding capacity (AWHC). The impact of erosion on yield at a field and regional level was estimated based on the extent of erosion determined from aerial photographs and the site-specific yield measurements. Estimated corn yield on two fields was about 92% of that expected if no erosion had occurred. In a 90-km2 area of the Regional Municipality of Waterloo, 18% of the cultivated land was estimated to be moderately to severely eroded. Based on the site-specific yield measurements, this erosion would result in a 3.6% reduction in average corn yield in the region. The implications of the findings on preventative and remedial measures and on future productivity in the region are discussed. Key words: Erosion, yield, corn, seedbed condition, nutrient deficiency, water stress

scholarly journals Mid-Season High-Resolution Satellite Imagery for Forecasting Site-Specific Corn Yield

2016 ◽  
Vol 8 (10) ◽  
pp. 848 ◽  
Author(s):  
Nahuel Peralta ◽  
Yared Assefa ◽  
Juan Du ◽  
Charles Barden ◽  
Ignacio Ciampitti
Keyword(s):  
High Resolution ◽  
Satellite Imagery ◽  
Corn Yield ◽  
Site Specific ◽  
High Resolution Satellite Imagery

scholarly journals Microbiome Management by Biological and Chemical Treatments in Maize is Linked to Plant Health

2020 ◽  
Author(s):  
Peter Kusstatscher ◽  
Wisnu Adi Wicaksono ◽  
Dhivya P. Thenappan ◽  
Eveline Adam ◽  
Henry Müller ◽  
...  
Keyword(s):  
Plant Growth Promoting Rhizobacteria ◽  
Amplicon Sequencing ◽  
Field Trials ◽  
Plant Health ◽  
Plant Performance ◽  
Corn Yield ◽  
Site Specific ◽  
Main Driver ◽  
Plant Growth Promoting ◽  
Stenotrophomonas Rhizophila

The targeted application of plant growth promoting rhizobacteria (PGPR) provides the key for a future sustainable agriculture with reduced pesticide application. PGPR interaction with the indigenous microbiota is poorly understood but essential to develop reliable applications. Therefore, Stenotrophomonas rhizophila SPA-P69 was applied as seed coating and in combination with a fungicide based on the active ingredients fludioxonil, metalaxyl-M, captan and ziram. Plant performance and rhizosphere composition of treated and non-treated maize plants of two field trials were analyzed. Plant health was significantly increased by treatment; however overall corn yield was not changed. By applying high-throughput amplicon sequencing of the 16S rRNA and the ITS genes, the bacterial and fungal changes in the rhizosphere due to different treatments were determined. Despite treatments had a significant impact on the rhizosphere microbiota (9- 12%), the field site was identified as main driver (27- 37%). Soil microbiota composition from each site was significantly different, which explains the site-specific effects. In this study we were able to show first indications how PGPR treatments increase plant health via microbiome shifts in a site-specific manner. This way first steps towards a detailed understanding of PGPRs and developments of consistently efficient applications in diverse environments are set.

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