PENETRATION RESISTANCE, SOIL WATER CONTENT, AND WORKABILITY OF GRASSLANDS SOILS UNDER TWO TILLAGE SYSTEMS

Experiments were conducted near Duke and Forgan, OK, on land enrolled in the Conservation Reserve program (CRP) that had been seeded to Old World bluestem (OWB) to evaluate tillage systems for returning CRP grassland to winter wheat production. Glyphosate controlled OWB 72% or less in no-till (NT) wheat. Disk tillage (DT) and moldboard plow tillage (MPT) for wheat seedbed preparation controlled OWB 87 and 99%, respectively, at Forgan and 96 and 100%, respectively, at Duke. At Forgan, OWB control in NT was higher when glyphosate was applied in July than when applied in May. Soil water content to a depth of 120 cm at planting was as high in DT and MPT without herbicide as in NT with 1,680 g ae/ha glyphosate. Within NT and MPT, glyphosate did not consistently increase soil water content compared to the respective nontreated checks. In DT, soil water content to a depth of 120 cm was greater following glyphosate at 1,680 g/ ha than without glyphosate. Wheat density was greater in DT and MPT than in NT. Compared to the NT no herbicide treatment, tillage tripled wheat yields. Wheat yields were often greater where glyphosate was applied before tillage. No-till wheat production immediately after CPR in Oklahoma without prior destruction of accumulated OWB residue does not appear feasible.

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Dynamics of soil water content under different tillage systems in agro-pastural eco-zone

Frontiers of Agriculture in China ◽

10.1007/s11703-008-0034-2 ◽

2008 ◽

Vol 2 (2) ◽

pp. 208-215 ◽

Cited By ~ 2

Author(s):

Yuecun Ma ◽

Hongling Qin ◽

Chunmei Yin ◽

Wangsheng Gao ◽

Hongsheng Zhang ◽

...

Keyword(s):

Water Content ◽

Soil Water ◽

Soil Water Content ◽

Tillage Systems

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Effects of soil water content and bulk density on the compactibility and soil penetration resistance of some Western Australian sandy soils

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts ◽

10.1016/0148-9062(89)92575-8 ◽

1989 ◽

Vol 26 (3-4) ◽

pp. A181

Keyword(s):

Water Content ◽

Bulk Density ◽

Soil Water ◽

Soil Water Content ◽

Sandy Soils ◽

Penetration Resistance ◽

Soil Penetration Resistance ◽

Western Australian

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Soil physico-hydraulic properties under organic conilon coffee intercropped with tree and fruit species

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2017000700008 ◽

2017 ◽

Vol 52 (7) ◽

pp. 539-547 ◽

Cited By ~ 5

Author(s):

Gustavo Soares de Souza ◽

Danielle Inácio Alves ◽

Maurício Lima Dan ◽

Julião Soares de Souza Lima ◽

Abner Luiz Castelão Campos da Fonseca ◽

...

Keyword(s):

Water Content ◽

Bulk Density ◽

Soil Water ◽

Soil Water Content ◽

Hydraulic Properties ◽

Penetration Resistance ◽

Native Forest ◽

Organic System ◽

Peach Palm ◽

Fruit Species

Abstract: The objective of this work was to evaluate the cultivation effects of organic conilon coffee (Coffea canephora) intercropped with tree and fruit species on soil physico-hydraulic properties. Conilon coffee managements in the organic system were: T1, full-sun monoculture; T2, T3, T4, and T5, intercropping with peach palm (Bactris gasipae), gliricidia (Gliricidia sepium), banana (Musa sp.), and inga (Inga edulis), respectively; and T6, an area of secondary native forest used as a control. The evaluated soil physico-hydraulic properties were: bulk density, porosity, plant-available water capacity, soil-penetration resistance, soil-water content, soil temperature, and least limiting water range. Conilon coffee intercropped with peach palm and gliricidia resulted in lower soil bulk density and penetration resistance, and in higher total porosity, microporosity, and soil-water content. Organic coffee shaded with peach palm and gliricidia improve the soil physico-hydraulic quality, in comparison with the soil under monoculture in full sun and with the soil of secondary native forest.

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The effects of soil water content and bulk density on the compactibility and soil penetration resistance of some Western Australian sandy soils

Soil Research ◽

10.1071/sr9880391 ◽

1988 ◽

Vol 26 (2) ◽

pp. 391 ◽

Cited By ~ 46

Author(s):

C Henderson ◽

A Levett ◽

D Lisle

Keyword(s):

Water Content ◽

Bulk Density ◽

Soil Water ◽

Soil Water Content ◽

Soil Compaction ◽

Field Capacity ◽

Penetration Resistance ◽

Coarse Sand ◽

Soil Penetration Resistance ◽

Compactive Effort

Quantitative models to predict the effects of soil compaction on wheat yields are being developed for the northern sandplains of Western Australia. An understanding of the relationships between soil water content (W), bulk density (p), compactibility and soil penetration resistance (P) is required. Thirteen subsoils from W.A. sandplain soils were tested for compactibility. As the amounts of very coarse sand or clay in the soil increased, the maximum density (�max.) achieved with a standard compactive effort also increased, while the critical soil water content (Wcrit,.) for maximum compactibility declined. The effects of p and W on P were investigated for five of the soils. The value of P was only slightly affected as W was reduced to less than 70% of the field capacity water content. As the soils were dried further, P increased exponentially. At all water contents, an increase in p was found to markedly increase P. Particle size distribution could be used to predict �max. and Wcrit., but could not be related to the effects of changes in p and W on P. The implications for the measurement and effects of soil compaction in the field are discussed.

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Modeling and correction of soil penetration resistance for varying soil water content

Geoderma ◽

10.1016/j.geoderma.2011.07.016 ◽

2011 ◽

Vol 166 (1) ◽

pp. 92-101 ◽

Cited By ~ 80

Author(s):

Carlos M.P. Vaz ◽

Juliana M. Manieri ◽

Isabella C. de Maria ◽

Markus Tuller

Keyword(s):

Water Content ◽

Soil Water ◽

Soil Water Content ◽

Penetration Resistance ◽

Soil Penetration Resistance

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Effects of spatial variability on soil physical attributes in areas cultivated with cassava prepared with different tillage systems

Comunicata Scientiae ◽

10.14295/cs.v8i2.1030 ◽

2018 ◽

Vol 8 (2) ◽

pp. 221-229

Author(s):

Edney Leandro Da Vitória ◽

Adriano Alves Fernandes

Keyword(s):

Spatial Variability ◽

Water Content ◽

Soil Water ◽

Soil Water Content ◽

Soil Depth ◽

Strong Dependence ◽

Soil Tillage ◽

Tillage Systems ◽

Classical Statistics ◽

Physical Attributes

The objective of this study was to understand the effect of the spatial variability of the soil physical attributes in areas cultivated with cassava with different soil tillage systems, using the techniques of classical statistics and geostatistics. The experiment was carried in 2013 in São Mateus - ES, Brazil, on a cohesive ultisol, with a plan relief. The preparation of the soil for transplanting were made in two adjacent areas of approximately 0.5 ha each, using up to two passes of a harrow disk or two passes of a chisel plow. The following soil physical attributes were studied 90 days after transplanting: soil density (DS), macroporosity (Macro) and microporosity (Micro), soil water content according to two preparations systems and two depth ranges. Eighty plants were randomly selected to perform the experiment. The soil physical properties resulted in spatial variability due to the strong dependence for all variables, tillage system and soil depth. The semivariograms were adjusted to the spherical and exponential models for the evaluated physical attributes. Except for water content, it was observed an increase in the range (A0) with increasing depth for both tillage systems. The soil water content presented a decrease about 23% for the harrowing and scarification systems.

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Onion yield as a function of soil tillage system and soil water content

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v24n2p115-120 ◽

2020 ◽

Vol 24 (2) ◽

pp. 115-120

Author(s):

Jardênia R. Feitosa ◽

Haroldo C. Fernandes ◽

Paulo R. Cecon ◽

Daniel M. Leite ◽

Filipe M. T. Nery ◽

...

Keyword(s):

Water Content ◽

Soil Water ◽

Soil Water Content ◽

Longitudinal Distribution ◽

Transverse Diameter ◽

Crop Response ◽

Tillage Systems ◽

Tillage System ◽

Water Contents ◽

Soil Water Contents

ABSTRACT Excessive tillage operations under inadequate conditions can raise the cost of agricultural production and lead to soil degradation without adequate crop response. The objective of this study was to evaluate the onion crop response to soil water contents and tillage systems. Three tillage systems were evaluated: P1 (plowing + two harrowings + two seedbed raising operations), P2 (two harrowings + one seedbed raising operation), P3 (one harrowing + one seedbed raising operation); and four soil water contents: 12, 15, 23 and 26%. The experiment was conducted in the irrigated perimeter of Tourão, Juazeiro, BA, Brazil (9° 24’ 7.3” S; 40° 26’ 8.7” W and altitude of 368 m), in 2017, and was installed in split plots, in a randomized block design, with four repetitions. Water contents were arranged in the plots and tillage systems in the subplots. Crop response to the applied treatments was evaluated through the determination of the emergence speed index of the seedlings, regularity of the longitudinal distribution of seedlings, final stand, total and marketable yields of the crop and yield per bulb transverse diameter class. The variation of soil water content had a quadratic effect on the variables emergence speed index, final stand and total onion yield. The treatments did not significantly affect the longitudinal distribution of plants and marketable yield. The tillage system composed of one harrowing and one seedbed raising operation showed to be the most appropriate for onion cultivation by direct seeding.

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