Circular Planting to Enhance Rainfall Capture in Dryland Cropping Systems at a Landscape Scale: Measurement and Simulation

Lascano, Robert J.; Nelson, J. Randall

doi:10.2134/advagricsystmodel5.c4

Cited by 8 publications

(6 citation statements)

References 78 publications

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“…Of particular interest is the detention of water on the soil surface to allow more time for the water to infiltrate in the soil. This practice via the use of furrow dikes [64] has been shown to be successful to harvest rainfall across the landscape [65]. Simulation of the effects of different detention capacities on rainfalls of different rates and amount is a subject of a forthcoming article.…”

Section: Daily Water Evaporationmentioning

confidence: 99%

Water Balance of Two Major Soil Types of the Texas High Plains: Implications for Dryland Crop Production

Lascano¹,

Leiker²,

Goebel³

et al. 2020

OJSS

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Crop production in the Texas High Plains is shifting from irrigated to dryland due to the increase of the depth to the water table from the Ogallala aquifer in regions where the saturated thickness of 9 m, the minimum to sustain irrigation, has been reached. Our objective was to use the mechanistic model ENWATBAL to evaluate the daily and annual water balance for three scenarios of rainfall in this region, a dry (189 mm), an average (449 mm) and a wet (669 mm) year. These three scenarios were applied to two major soil series of this region, Pullman and Amarillo. In all simulations, we used hourly input weather data for a location near Lubbock, Texas and used measured soil hydraulic properties to simulate the water balance for each soil series and the three rainfall scenarios. Results showed that in years with average and wet rain, storage of rainfall occurred in the Pullman but not in in the Amarillo soil series. However, storage of water could be enhanced by combining furrow dikes with minimum tillage along with crop covers that provide a surface residue. The implications of our results for dryland crop production in the semiarid climate of the THP suggest that for years with average and wetter rainfall soils in the Pullman series could store water that would be available for crop use. However, this was not the case for the Amarillo soil series and these soils represent a higher risk for dryland crop production.

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Section: Daily Water Evaporationmentioning

confidence: 99%

Water Balance of Two Major Soil Types of the Texas High Plains: Implications for Dryland Crop Production

Lascano¹,

Leiker²,

Goebel³

et al. 2020

OJSS

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“…The PALMS model has been used to evaluate ways to enhance rainfall capture and infiltration in dryland cropping systems of the SHP (Nelson, 2010; Nelson et al, 2013; Lascano and Nelson, 2014). The suitability of the model to calculate soil water content was evaluated using as input the default soil hydraulic parameter set based on Rawls et al (1982) in two cotton fields representing sandy loam and sandy clay loam surface textures.…”

Section: Model Descriptionmentioning

confidence: 99%

Evaluation of a Landscape‐Scale Approach to Cotton Modeling

et al. 2014

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The Texas Southern High Plains is a semiarid region for cotton (Gossypium hirsutum L.) production that uses irrigation water from the Ogallala Aquifer, where depletion exceeds recharge, prompting limits to pump water. Thus, there is a need for management strategies to optimize the diminishing water, and these could be modeled provided the spatiotemporal variability associated with irrigated cotton production is captured. The Precision Agricultural-Landscape Modeling System (PALMS) is a grid-based model that accounts for variability across complex landscapes but lacked a cotton model. Our objective was to integrate the Cotton2K model with PALMS to produce PALMScot and to compare calculated values of soil water storage obtained with PALMScot to field-measured values for 2 yr and two irrigation treatments at two locations with contrasting soils, a fine sandy loam near Lamesa, TX, and a clay loam near Bushland, TX. Two statistics, mean absolute difference (MAD) and modified coefficient of efficiency (E 1 ) were used to compare differences between measured and calculated values of soil water content. In both years, MAD was <5% in the Amarillo and <10% in the Pullman soils and E 1 was 0.2 in the Amarillo and 0.4 in the Pullman soils, supporting the accuracy of the calculated values. Within the 1.4-m profile of both soils, however, the model overestimated root water uptake in the surface horizon and underestimated it in deeper ones. Our evaluation implied that PALMScot is a tool that can be used to track spatial and temporal variability of soil water storage across a complex landscape.

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“…In the THP the combination of frequent droughts and rainfall patterns that are subject to runoff is problematic for dryland agriculture where the only source of water for crop production is from effective rain, i.e., net water stored in the soil. The harvest of rainwater for agriculture in dry regions is a subject of much research, and of interest is to determine agronomic management practices that may lead to increase infiltration of rain [4] [5].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Stable Isotopes of Water to Determine Rainwater Infiltration in Soils under Conservation Reserve Program

Goebel¹,

Lascano²,

Acosta-Martínez³

2016

JACEN

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The Conservation Reserve Program (CRP) is a USDA program introduced in 1985 to reduce soil erosion by increasing vegetative cover of highly erodible land. Participation in the CRP is done via contracts (10-15 years in length) and currently the total area of land under contract is set to decline as per the 2014 Farm Bill. The Texas High Plains (THP) leads the US with >900,000 ha enrolled in CRP. A potential longterm benefit of CRP is to increase soil organic matter and to improve soil structure leading to increased water infiltration. Our objective was to evaluate the feasibility of using stable isotopes of water to measure and compare infiltration of rain in land under CRP management to land under continuous dryland cotton in the THP. For this purpose we selected two sites, with soils in the Amarillo series, enrolled in CRP, one for 25 years and the second site for 22 years. Results from several rain events showed that stable isotopes of water are a method that can be used to evaluate the depth of rainwater infiltration for soils under CRP and dryland management.

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Circular Planting to Enhance Rainfall Capture in Dryland Cropping Systems at a Landscape Scale: Measurement and Simulation

Cited by 8 publications

References 78 publications

Water Balance of Two Major Soil Types of the Texas High Plains: Implications for Dryland Crop Production

Water Balance of Two Major Soil Types of the Texas High Plains: Implications for Dryland Crop Production

Evaluation of a Landscape‐Scale Approach to Cotton Modeling

Evaluation of Stable Isotopes of Water to Determine Rainwater Infiltration in Soils under Conservation Reserve Program

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