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

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

Transactions of the ASABE ◽

10.13031/2013.21727 ◽

2006 ◽

Vol 49 (4) ◽

pp. 875-882 ◽

Cited By ~ 11

Author(s):

J. Bueno ◽

C. Amiama ◽

J. L. Hernanz ◽

J. M. Pereira

Keyword(s):

Water Content ◽

Soil Water ◽

Soil Water Content ◽

Penetration Resistance ◽

Tillage Systems

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Effect of Tillage Systems on the Variability of Soil-Water Tensions and Soil-Water Content

Transactions of the ASAE ◽

10.13031/2013.31045 ◽

1989 ◽

Vol 32 (2) ◽

pp. 0605-0610 ◽

Cited By ~ 8

Author(s):

R. S. Kanwar

Keyword(s):

Water Content ◽

Soil Water ◽

Soil Water Content ◽

Tillage Systems

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Soil- Water Content Changes Under Three Tillage Systems Used for Cotton

Journal of Sustainable Agriculture ◽

10.1300/j064v07n02_07 ◽

1996 ◽

Vol 7 (2-3) ◽

pp. 53-61 ◽

Cited By ~ 1

Author(s):

K. H. Yoo ◽

J. H. Dane ◽

B. C. Missildine

Keyword(s):

Water Content ◽

Soil Water ◽

Soil Water Content ◽

Tillage Systems

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A Chernozem soil water regime response to predicted climate change scenarios

Soil and Water Research ◽

10.17221/1410-swr ◽

2008 ◽

Vol 3 (Special Issue No. 1) ◽

pp. S58-S67 ◽

Cited By ~ 2

Author(s):

C. Farkas ◽

A. Hagyó ◽

E. Horváth ◽

G. Várallyay

Keyword(s):

Climate Change ◽

Water Content ◽

Soil Water ◽

Soil Water Content ◽

Water Regime ◽

Plant Production ◽

Soil Tillage ◽

Climate Change Scenarios ◽

Tillage Systems ◽

Soil Water Regime

Climate, hydrology and vegetation are closely linked at local, regional and global scales. The recent land use and plant production systems are adapted to the present climatic conditions. Thus, studies on the influence of possible climate change scenarios on the water and heat regimes of the soil-plant-atmosphere system are important in order to work out plant production strategies, adjusted to changed conditions. In this study the effect of two possible climate change scenarios on the soil water regime of a Chernozem soil was estimated for a Hungarian site. Soil water content dynamics simulated for different conventional and soil conserving soil tillage systems were evaluated, using the SWAP soil water balance simulation model. The combined effect of different soil tillage systems and climate scenarios was analysed. Climate scenarios were represented through the cumulative probability function of the annual precipitation sum. The SWAP model was calibrated against the measured in the representative soil profiles soil water content data. The site- and soil-specific parameters were set and kept constant during the scenario studies. According to the simulation results, increase in the average growing season temperature showed increase in climate induced soil drought sensitivity. The evaluated soil water content dynamics indicated more variable and less predictable soil water regime compared to the present climate. It was found that appropriate soil tillage systems that are combined with mulching and ensure soil loosening could reliably decrease water losses from the soil. From this aspect cultivator treatment created the most favourable for the plants soil conditions. It was concluded that soil conserving soil management systems, adapted to local conditions could contribute to soil moisture conservation and could increase the amount of plant available water under changing climatic conditions.

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