In-row tillage methods for subsoil amendment and starter fertilizer application to conservation-tilled grain sorghum

Reeves, D. W.; Edwards, J. H.; Elkins, Charles B.; Touchton, J. T.

doi:10.1016/0167-1987(90)90071-k

Cited by 20 publications

(12 citation statements)

References 21 publications

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“…Subsoiling increased collards' yield signifi cantly compared to conventional tillage treatments (Table 2), confi rming the observation made by Reeves et al (1990), where the presence of tillage pans was found to limit crop yields on sandy soils of the southern coastal plain of the United States. Type of tillage system did not have any signifi cant infl uence on nutrient levels in the soil (Table 2).…”

Section: Resultssupporting

confidence: 81%

Influence of Soil and Nutrient Management on Growth and Quality of Collards

Mylavarapu¹,

Smith²,

Muñoz³

2005

horttech

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High temperature and humidity during summer months in the southeastern U.S., in addition to crop nutritional status, are suggested to be the primary reasons for tipburn incidence in collards (Brassica oleracea Acephala Group) adversely affecting their marketability. A 2-year study was conducted to evaluate the efficiency of grower's standard practice (GSP), GSP + gypsum, and a programmed-release fertilizer (PRF) under conventional and deep tillage on collard yield and tipburn incidence. Subsoiling significantly increased yield over conventional tillage. Nutrient supply through PRF did not increase the yields; however, it resulted in either similar or higher levels of macro- and micronutrient levels both in soils and collard tissue compared to GSP and GSP + gypsum treatments. The occurrence of tipburn in collards is dependent on several factors, including nutritional, physiological, and environmental stresses. Regression analyses of tipburn ratings at harvest time and the soil and tissue nutrient content suggested that 47% of the variation could be attributed to soil and tissue levels of sulfur (S), zinc (Zn), and phosphorus (P). It is important, therefore, to ensure an optimum supply of nutrients to the plants to maintain the quality of the yields. The advantage of PRF in sandy soils, and identification of other factors affecting the tipburn in collards should be further investigated.

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Section: Resultssupporting

confidence: 81%

Influence of Soil and Nutrient Management on Growth and Quality of Collards

Mylavarapu¹,

Smith²,

Muñoz³

2005

horttech

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“…Fehrenbacher et al (1958) observed increased corn yield when a combination of limestone, P, and K was mixed to depths of 91 em on a Weir silt loam (Typic Ochraqualf) soil in Illinois. Reeves et al (1990) did not observe any benefit to grain sorghum (Sorghum bicolor L. Moench.)…”

mentioning

confidence: 89%

In‐Row Subsoiling and Potassium Placement Effects on Root Growth and Potassium Content of Cotton

et al. 1994

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One method of correcting K deficiencies in cotton (Gossypium hirsutum L.) is by in‐row deep placement of K fertilizer. At present, the mechanisms involved in cotton yield response to deep placement of K have not been elucidated. A field study was conducted in 1990 and 1991 to evaluate root development and dry matter yield of cotton as affected by in‐row subsoiling and placement of K fertilizer. The experiment was located in central Alabama on a Norfolk fine sandy loam (fine‐loamy, siliceous, thermic Typic Kandiudult). Five treatments were compared: (i) check, without in‐row subsoiling; (ii) check, with in‐row subsoiling; (iii) 84 kg K ha−1 surface‐applied, without in‐row subsoiling; (iv) 84 kg K ha−1 surface‐applied, with in‐row subsoiling; and (v) 84 kg K ha−1 deep‐placed, in‐row. Penetrometer readings taken in 1991 demonstrated that the soil has a well‐developed traffic pan at a depth of approximately 15 to 38 cm. In‐row subsoiling disrupted the pan up to 25 cm away from the in‐row position. Root density measurements taken in‐row showed that root growth at depths > 20 cm was improved by in‐row subsoiling and K fertilization. Cotton root growth at depths > 20 cm was generally better for the treatment receiving the deep applied K. However, broadcast K in combination with in‐row subsoiling resulted in the highest productivity and K accumulation per plant. Results of this study suggest that, for cotton production in Alabama, deep placement of K is not superior to broadcast applications of K.

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“…High‐biomass cover crops such as winter cereals tend to have high C/N ratios (Huntington et al, 1985; Reeves, 1994). As they decompose, any N present is consumed or “immobilized.” This is the reason that typical N recommendations for crops following high‐residue cereals are increased up to 30 lb/acre in the form of additional N or used as a starter fertilizer application to promote early‐season growth (Brown et al, 1985; Reeves, 1994; Reeves et al, 1990). Typical termination times for these covers correspond to flowering or later (Ashford and Reeves, 2003).…”

Section: Nitrogen Managementmentioning

confidence: 99%

Timing of Cover Crop Termination: Management Considerations for the Southeast

Balkcom

Duzy

Kornecki

et al. 2015

Crop Forage & Turfgrass Mgmt

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Conservation tillage combined with high‐residue cover crops make up the two components that define a conservation system designed to increase productivity and improve soil quality. Cover crops are an important part of these systems that maintain and/or improve soil quality. The proper timing of cover crop termination is one important management consideration growers must consider on a site‐ and situation‐specific basis when adopting a conservation system. Cover crops terminated too early in the season diminish associated soil quality and crop production benefits, while delaying termination until closer to cash crop planting dates maximizes soil quality and crop production benefits. However, delaying termination increases risk associated with crop emergence, particularly in dryland conditions. Management considerations that include the cover crop growing season, soil moisture, soil temperature, nitrogen (N) management, alleopathy/weed suppressive potential, and equipment each affect timing of cover crop termination. Growers that consider each of these management considerations with respect to timing of cover crop termination can successfully use cover crops to enhance crop productivity while minimizing risk to cash crop establishment.

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In-row tillage methods for subsoil amendment and starter fertilizer application to conservation-tilled grain sorghum

Cited by 20 publications

References 21 publications

Influence of Soil and Nutrient Management on Growth and Quality of Collards

Influence of Soil and Nutrient Management on Growth and Quality of Collards

In‐Row Subsoiling and Potassium Placement Effects on Root Growth and Potassium Content of Cotton

Timing of Cover Crop Termination: Management Considerations for the Southeast

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