Measurement and modeling of phosphorous transport in shallow groundwater environments

Hendricks, G.; Shukla, Sanjay Kumar; Obreza, Thomas A.; Harris, Willie G.

doi:10.1016/j.jconhyd.2014.05.003

Cited by 7 publications

(3 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, the researcher assessed twenty potato fields under irrigation across two potato production regions in South Africa (i.e., the interior of South Africa covering the North West Province and the very western part of the Free State Province and the Sandveld region within the Western Cape Province. As reported by several works, sustainable production of irrigated crops in arid regions necessitates a shift toward optimizing water and nutrient utilization while minimizing leaching risks (Ierna et al, 2011;Hendricks et al, 2014). Steyn et al (2016), reiterated that the disparities in water and nutrient use efficiencies among potato growers in South Africa, even within similar agroecological zones, underscore the significance of crop management practices in ecological sustainability and economic viability.…”

Section: Article : "In-field Assessment Of the Variability In Water A...mentioning

confidence: 92%

Editorial: Water-smart crop farming: a holistic approach to its practice as a climate change adaptation strategy in Sub-Saharan Africa

Amankwaa-Yeboah,

Yeboah,

Oppong-Sekyere

2024

Front. Sustain. Food Syst.

View full text Add to dashboard Cite

Editorial on the Research Topic Water-smart crop farming: a holistic approach to its practice as a climate change adaptation strategy in Sub-Saharan Africa Research Topic identified some water-smart farming technologies such as irrigation (including supplementary irrigation of rain-fed systems), glasshouse farming, use of water use-efficient technologies such as drought tolerant crop genotypes, remote sensing, weather forecast and moisture monitoring, crop diversification, biological and engineering bases soil, and water conservation measures. Objectives of the Research Topic and editorialThe Research Topic proposed a collection that centers around water-smart farming approaches for sustainable crop production. The Research Topic was expected to span papers in agricultural water management and conservation as well as ecological approaches for landscape management and aquifer recharge as well as on-farm

show abstract

Section: Article : "In-field Assessment Of the Variability In Water A...mentioning

confidence: 92%

Editorial: Water-smart crop farming: a holistic approach to its practice as a climate change adaptation strategy in Sub-Saharan Africa

Amankwaa-Yeboah,

Yeboah,

Oppong-Sekyere

2024

Front. Sustain. Food Syst.

View full text Add to dashboard Cite

show abstract

“…Phosphate rock could in principle be treated to remove contaminants, but this process involves a cost, which is likely to be prohibitive for a wide segment of the world population. In the absence of such processing, some of the contaminants not only accumulate in soils, but are also likely to migrate to the underlying groundwater bodies, through direct or facilitated transport, along with the phosphates themselves (e.g., Hendricks et al, 2014).…”

Section: Abundance Of Negative Environmental Consequencesmentioning

confidence: 99%

Looming Scarcity of Phosphate Rock and Intensification of Soil Phosphorus Research

Baveye

2015

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

In recent years, many researchers have claimed that world reserves of rock phosphate were getting depleted at an alarming rate, putting us on the path to scarcity of that essential resource within the next few decades. Others have claimed that such alarmist forecasts were frequent in the past and have always been proven unfounded, making it likely that the same will be true in the future. Both viewpoints are directly relevant to the level of funding devoted to research on the use of phosphate fertilizers. In this short essay, it is argued that information about future reserves of P or any other resource are impossible to predict, and therefore that the threat of a possible depletion of P reserves should not be used as a key motivation for an intensification of research on soil P. However, there are other, more compelling reasons, both geopolitical and environmental, to urgently step up our collective efforts to devise agricultural practices that make better use of P than is the case at the moment. keywords: phosphorus reserves, phosphorus availability, depletion phosphorus, food security. RESUmO:

show abstract

“…For irrigated crop production in dry areas to be sustainable, production practices should move toward optimization of water and nutrient usage, minimizing leaching risk and maximizing water and nutrient use efficiencies (Ierna et al, 2011;Hendricks et al, 2014). A survey among potato growers in South Africa highlighted large differences between farmers in water and nutrient use efficiencies of potato over multiple years, even within relatively homogenous agroecological zones (Steyn et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

In-field assessment of the variability in water and nutrient use efficiency among potato farmers in a semi-arid climate

Franke,

Machakaire,

Mukiibi

et al. 2023

Front. Sustain. Food Syst.

View full text Add to dashboard Cite

Precise water management is imperative for sustainable crop production under irrigation in semi-arid regions with increasingly variable rainfall. Water use efficiencies achieved by farmers often differ widely, even within regions with homogenous agro-ecological conditions. To better understand the drivers of this variability and derive management recommendations, detailed measurements of water and associated nutrient dynamics were conducted on 20 potato farms in two regions of South Africa. Crop characteristics and typical growing conditions in South Africa make potato cultivation sensitive to water and nutrient losses. Water and nutrient inputs and losses through drainage and plant uptake were measured in potato and the follow-up crop, along with yield and weather variables. Seasonal mean irrigation and evapotranspiration were lower in winter crops (240 mm irrigation, 236 mm evapotranspiration) than in summer crops (598 mm irrigation, 608 mm evapotranspiration). Seasonal field water balances were often close to zero, indicating that estimations of evapotranspiration and drainage were representative for the greater field. Lysimeter observations however appeared more representative in sandy unstructured soils than in heavier structured soils. Rainfall during cropping reduced demand for irrigation and increased water use efficiency based on irrigation water, but caused substantial drainage. Leaching of N and K was considerable (on average 30 kg N, 55 kg K ha−1, much higher in some fields), while P leaching was negligible, with the exception of one field (51 kg P ha−1). Variation in water and nutrients use efficiencies was the result of management decisions and environmental factors, such as rainfall and soil type. Without substantial rainfall, application of irrigation scheduling tools can keep drainage and nutrient losses to a minimum, as was observed on almost half the fields, even on sandy soils with a low water holding capacity. Potato yields greatly varied among farmers (9.1–24.7 t dry matter tuber ha−1). Efficient farmers included those who used water sparsely and had minimal drainage, but also farmers who used inputs judiciously and obtained excellent productivity. The role of follow-up crops as users of surplus nutrients and water left behind by the potato crop was not always evident.

show abstract

Measurement and modeling of phosphorous transport in shallow groundwater environments

Cited by 7 publications

References 36 publications

Editorial: Water-smart crop farming: a holistic approach to its practice as a climate change adaptation strategy in Sub-Saharan Africa

Editorial: Water-smart crop farming: a holistic approach to its practice as a climate change adaptation strategy in Sub-Saharan Africa

Looming Scarcity of Phosphate Rock and Intensification of Soil Phosphorus Research

In-field assessment of the variability in water and nutrient use efficiency among potato farmers in a semi-arid climate

Contact Info

Product

Resources

About