Soil and crop response to varying planter's downforce in corn and cotton fields

IF 6.3 Q1 AGRICULTURAL ENGINEERING Smart agricultural technology Pub Date : 2025-01-22 DOI:10.1016/j.atech.2025.100798
Luan Oliveira , Brenda Ortiz , Gregory Pate , Thomas Way , Rouverson Silva
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Abstract

Effective planter downforce is crucial for optimizing seed placement and improving crop emergence and growth. This study explores the impact of different downforce settings on soil compaction, seeding depth, and crop performance for corn and cotton. Two field experiments were implemented using a John Deere 6145R tractor and a 6-row John Deere planter equipped with a DeltaForce® hydraulic downforce system in Shorter, Alabama, during the 2020 growing season. Multiple planter's downforce levels (0, 550, 1100, and 1800 N) were tested in both static and dynamic modes across two fields with distinct soil types (clay loam and sandy loam). Results indicated that the dynamic downforce mode provided more accurate and consistent load distribution compared to the static mode, which often exceeded target loads. Increased downforce led to deeper seeding depths, particularly with the dynamic mode, and higher loads in the static mode resulted in greater variability. For corn in clay loam soil, higher static downforce improved seed-to-soil contact, enhancing emergence and plant height. Conversely, cotton in sandy loam soil showed no significant differences in emergence or plant height, likely due to soil moisture conditions and target depth. The study concludes that dynamic downforce systems offer superior load control and uniformity, enhancing corn emergence and growth in heavier soils, while further research is recommended to optimize settings for various crops and soil conditions.
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