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Timlin, Dennis; Pachepsky, Yakov; Reddy, Vangimalla R.

doi:10.1023/a:1013385026500

Cited by 30 publications

(10 citation statements)

References 14 publications

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“…A horizontal variability was observed for E at the row scale ( Figure 6). This was consistent with the findings of Hupet and T A B L E 2 Regression coefficients for soil water content (θ) of 0-15 cm, soil surface water evaporation (E), throughfall (TF) or throughfall ratio (TFR) of mean, standard deviation (SD) or coefficient of variation (CV) regressed against their influence factors Vanclooster (2004,2005), and Timlin et al (2001). And it was mainly due to the existence of the corn canopy, as the irradiance on the surface of the row varied at this scale, resulting in the variation of E (Llorens & Domingo, 2007).…”

Section: Factors Affecting the Horizontal Variability Of E And Tfsupporting

confidence: 88%

“…In this study, the relationship between the mean θ and the mean TFR was linear (Table 2). Timlin et al (2001) also found that TF had a significant impact on the horizontal variability of θ. Secondly, due to the different shading rates of corn canopies at different measurement positions, the irradiance on the surface of the corn row was different, resulting in a difference in E, which indirectly led to the heterogeneity of θ at the row scale. In this study, we confirmed that the SD and CV of θ at the 0-15 cm soil layer decreased with the mean E, and the mean θ of 0-15 cm was positive correlated with HI and LAI of corn (Table 2).…”

Section: Factors Affecting the Horizontal Variability Ofmentioning

confidence: 77%

“…Root water uptake and soil evaporation also affect the distribution of soil water (Dolan, Dowdy, & Lamb, 2001;Hupet & Vanclooster, 2005;Logsdon et al, 2010). Timlin, Pachepsky, and Reddy (2001) showed that the row positions of soybean received significantly more water during precipitation than the interrow positions, and evaporation was also significantly greater in the row position than that in the interrow position on silt loam soil. Paltineanu and Starr (2000), and Martello, Ferro, Bortolini, and Morari (2015) suggested that soil moisture in the corn row position on silt loam soil was higher than that in the interrow position at rainfall amounts <15 mm.…”

Section: Introductionmentioning

confidence: 99%

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Horizontal variability of soil water content, evaporation and throughfall in corn row

Sun

2020

Soil Science Soc of Amer J

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Horizontal variability of soil water content (θ), soil surface water evaporation (E), and throughfall (TF) at the row scale have great influence on agricultural production, hydrological simulation and sampling strategy. The objective of the present study was to assess the horizontal variability and the most representative measurement position of θ, E, and TF at the corn (Zea mays L.) row scale in a field experiment. Five measurement positions of P0, P15, P30, P45 and P60 were at 0, 15, 30, 45 and 60 cm from the corn row line, respectively. The horizontal variability of θ mainly existed in 0–15 cm soil layer (P = 0.031). The coefficient of variation (CV) of the θ of 0–15, 30, and 50 cm ranged from 7.0–25.1%, 4.1–10.2%, and 5.3–11.4%, respectively. The CV of the E and TF ranged from 9.9–27.2% and 20.4–35.6%, respectively. The P15 or P45 was regarded as the most representative measurement position for measuring the θ of 0–15, 30, and 50 cm, with a probability of 51.0–58.8%, 43.1–43.1%, and 54.9–60.8%, respectively, and that for TF was 93.9–84.8%. The probability of P15 as the most representative measurement position to determine E was 61.1%. Therefore, horizontal variability of θ, E, and TF in a row‐planted crop field could not be ignored. The P15 was the most representative measurement position of θ, E, and TF in such an experimental condition.

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Section: Factors Affecting the Horizontal Variability Of E And Tfsupporting

confidence: 88%

Section: Factors Affecting the Horizontal Variability Ofmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

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Horizontal variability of soil water content, evaporation and throughfall in corn row

Sun

2020

Soil Science Soc of Amer J

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“…Row planting of crops may result in large variations in soil moisture, nutrients, and pathogens at the row scale (Hupet & Vanclooster, 2005;Kabbage & Bockus, 2002;Moreira et al, 2016;Timlin, Pachepsky, & Reddy, 2001;Van Wesenbeeck & Kachanoski, 1988). Timlin et al (2001) showed that both soil water and evaporation were higher (P < .05) in the intra-row positions than in the inter-row positions. Van Wesenbeeck and Kachanoski (1988) showed that the intra-row corn roots absorbed the most water, and soil water contents were higher in the inter-row position than the intra-row position.…”

Section: Introductionmentioning

confidence: 98%

“…This approach is to optimize the seeding operation for residue handling, herbicide incorporation and to reduce disease risk associated with stubble from previous crops (Kabbage & Bockus, 2002). Row planting of crops may result in large variations in soil moisture, nutrients, and pathogens at the row scale (Hupet & Vanclooster, 2005;Kabbage & Bockus, 2002;Moreira et al, 2016;Timlin, Pachepsky, & Reddy, 2001;Van Wesenbeeck & Kachanoski, 1988). Timlin et al (2001) showed that both soil water and evaporation were higher (P < .05) in the intra-row positions than in the inter-row positions.…”

Section: Introductionmentioning

confidence: 99%

Row placement affects yield and water use efficiency of continuous corn

Sun

2020

Agronomy Journal

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The planting of crops in rows results in a large amount of variation in soil nutrient levels and soil water. The hypothesis of this paper is that row spacing can be adjusted to optimize water use efficiency (WUE). The objective was to investigate the effects of row placement on corn (Zea mays L.) growth, leaf photosynthetic characteristics, yield, soil water, inorganic nitrogen (N), evapotranspiration (ET), and WUE in the Corn Belt of Northeast China (CBNC). Corn was planted in either the intra‐row or inter‐row space of the previously planted corn in a 2‐yr (2017–2018) field experiment in Jilin Province, China. All corns were planted at a row spacing of 60 cm, a plant spacing of 28 cm, and a density of 60,000 plants ha−1 per year. The inter‐row corn treatment maintained higher leaf area index, net photosynthetic rate, and transpiration rate at the R3 growth stage in 2017 and 2018. The corn yields of inter‐row treatment were 6.0% and 8.5% higher (P ≤ .05) in 2017 and 2018, respectively, compared with intra‐row treatment. The ET in inter‐row treatment was 4.4% (P < 0.01) lower in 2017 and its 2‐yr WUE was 11.5% higher (P = 0.016) than that of intra‐row treatment. These findings suggest that corn rows should be arranged at the inter‐row of the previous corn in a continuous corn cropping field, and an intra‐row position of the previous crop should be considered in the definition of continuous monocropping for row‐planted crops.

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Evidence of large rainfall partitioning patterns by banana and impact on surface runoff generation

Cattan

Bussière²,

Nouvellon

2007

Hydrological Processes

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Abstract:In this article the effect of redistribution of rainfall by banana on local water fluxes and the possible impact of these fluxes on surface runoff has been studied. First the water redistribution by a banana canopy at three development stages (vegetative, flowering, and bunch stage) was measured. The results showed a considerable stemflow, proportional to the leaf area index (LAI), which represented 18 to 26% of the incident rainfall volume according to the age of the crop. Consequently, the rainfall rate was 28-fold higher at the plant collar for a fully developed banana canopy. For the throughfall, on average, the higher the LAI, the lower the mean throughfall. In addition, the spatial distribution of the throughfall varied according to the distance from the pseudostem. Notably, for the earlier stages, the area between the pseudostem and 0Ð5 m from it received weak throughfall. Secondly, simulations were carried out with a simple two-compartment model simulating the total surface runoff volume. The simulations showed stemflow combined with the agronomical practice of furrowing has an effect on runoff compared to bare soil. A relative increase in surface runoff volume of three-fold was encountered on a plot with a fully developed banana and a infiltration rate of 60 mm h 1 . However, the absolute increase was only a few percentage of the incident rainfall volume, although it represented large water volumes given the tropical rains. These features must be taken into account for hydrological management of such systems.

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Cited by 30 publications

References 14 publications

Horizontal variability of soil water content, evaporation and throughfall in corn row

Horizontal variability of soil water content, evaporation and throughfall in corn row

Row placement affects yield and water use efficiency of continuous corn

Evidence of large rainfall partitioning patterns by banana and impact on surface runoff generation

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