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Dr. Angela Puig Sirera
University of Pisa - Department of Agriculture, Food and Environment

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Research Keywords & Expertise

0 Agriculture 4.0
0 Modeling & simulation
0 Water - energy – food nexus
0 Water & soil quality monitoring
0 GIS & Remote Sensing

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Journal article
Published: 16 February 2021 in Remote Sensing
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The work aimed to discriminate among different soil management treatments in terms of beneficial effects by high-resolution thermal and spectral vegetation imagery using an unmanned aerial vehicle and open-source GIS software. Five soil management treatments were applied in two organic vineyards (cv. Sangiovese) from Chianti Classico terroir (Tuscany, Italy) during two experimental years. The treatments tested consisted of conventional tillage, spontaneous vegetation, pigeon bean (Vicia faba var. minor Beck) incorporated in spring, mixture of barley (Hordeum vulgare L.) and clover (Trifolium squarrosum L.) incorporated or left as dead mulch in late spring. The images acquired remotely were analyzed through map-algebra and map-statistics in QGIS and correlated with field ecophysiological measurements. The surface temperature, crop water stress index (CWSI) and normalized difference vegetation index (NDVI) of each vine row under treatments were compared based on frequency distribution functions and statistics descriptors of position. The spectral vegetation and thermal-based indices were significantly correlated with the respective leaf area index (R2 = 0.89) and stem water potential measurements (R2=0.59), and thus are an expression of the crop vigor and water status. The gravel and active limestone soil components determined the spatial variability of vine biophysical (e.g., canopy vigor) and physiological characteristics (e.g., vine chlorophyll content) in both farms. The vine canopy surface temperature, and CWSI were lower on the spontaneous and pigeon bean treatments in both farms, thus evidencing less physiological stress on the vine rows derived from the cover crop residual effect. In conclusion, the proposed methodology showed the capacity to discriminate across soil management practices and map the spatial variability within vineyards. The methodology could serve as a simple and non-invasive tool for precision soil management in rainfed vineyards to guide producers on using the most efficient and profitable practice.

ACS Style

Àngela Puig Sirera; Daniele Antichi; Dylan Warren Raffa; Giovanni Rallo. Application of Remote Sensing Techniques to Discriminate the Effect of Different Soil Management Treatments over Rainfed Vineyards in Chianti Terroir. Remote Sensing 2021, 13, 716 .

AMA Style

Àngela Puig Sirera, Daniele Antichi, Dylan Warren Raffa, Giovanni Rallo. Application of Remote Sensing Techniques to Discriminate the Effect of Different Soil Management Treatments over Rainfed Vineyards in Chianti Terroir. Remote Sensing. 2021; 13 (4):716.

Chicago/Turabian Style

Àngela Puig Sirera; Daniele Antichi; Dylan Warren Raffa; Giovanni Rallo. 2021. "Application of Remote Sensing Techniques to Discriminate the Effect of Different Soil Management Treatments over Rainfed Vineyards in Chianti Terroir." Remote Sensing 13, no. 4: 716.

Journal article
Published: 30 January 2021 in Agricultural Water Management
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The knowledge of the crop response to soil water deficit is essential to predict the actual crop water requirements under limited soil water conditions. The mathematical schematization of the crop response under RDI can allow identifying the exact irrigation timing. The threshold of soil water status below which crop transpiration decreases represents a key parameter for the water stress functions. The main objective of this paper was to investigate the effects of several RDI treatments, applied during the three stages of fruit growth, on soil-plant-water relations of drip-irrigated mandarin trees. Experiments were carried out in seven irrigation treatments: a control, irrigated at 125% of potential evapotranspiration measured in weighting lysimeters, ETlys, during the whole year, and six RDI treatments in which 25% and 50% of ETlys were applied during each of the three stages of fruit growth. The critical threshold of soil water status expressed in terms of soil water depletion below which predawn (PLWP) and midday (MSWP) leaf water potential is affected by decreasing soil water content, were identified. The dependency of crop water status from the climate forcing, occurring under soil water contents higher than the critical threshold was also demonstrated. Moreover, a strong relationship between water stress integral (SMSWP) evaluated during the three stages of fruit growth, and the corresponding amount of water applied (irrigation and precipitation) was observed after normalizing the variables. The robust relationship between these two variables (R2 = 0.83) confirmed that the water stress integral represents a good indicator of the plant-water relationship and allows the prediction of the total irrigation depth to be applied to achieve a desired stress level during the fruit growth. Moreover, this relationship depends on the irrigation schedule adopted to regulate the deficit, which includes the irrigation variables, such as irrigation dose and its variability.

ACS Style

Àngela Puig-Sirera; Giuseppe Provenzano; Pablo González-Altozano; Diego S. Intrigliolo; Giovanni Rallo. Irrigation water saving strategies in Citrus orchards: Analysis of the combined effects of timing and severity of soil water deficit. Agricultural Water Management 2021, 248, 106773 .

AMA Style

Àngela Puig-Sirera, Giuseppe Provenzano, Pablo González-Altozano, Diego S. Intrigliolo, Giovanni Rallo. Irrigation water saving strategies in Citrus orchards: Analysis of the combined effects of timing and severity of soil water deficit. Agricultural Water Management. 2021; 248 ():106773.

Chicago/Turabian Style

Àngela Puig-Sirera; Giuseppe Provenzano; Pablo González-Altozano; Diego S. Intrigliolo; Giovanni Rallo. 2021. "Irrigation water saving strategies in Citrus orchards: Analysis of the combined effects of timing and severity of soil water deficit." Agricultural Water Management 248, no. : 106773.

Journal article
Published: 08 February 2018 in Water
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Accurate soil water status measurements across spatial and temporal scales are still a challenging task, specifically at intermediate spatial (0.1–10 ha) and temporal (minutes to days) scales. Consequently, a gap in knowledge limits our understanding of the reliability of the spatial measurements and its practical applicability in agricultural water management. This paper compares the cumulative EM38 (Geonics Ltd., Mississauga, ON, Canada) response collected by placing the sensor above ground with the corresponding soil water content obtained by integrating the values measured with an FDR (frequency domain reflectometry) sensor. In two field areas, characterized by different soil clay content, two Diviner 2000 access tubes (1.2 m) were installed and used to quantify the dimensionless fraction of transpirable soil water (FTSW). After the calibration, the work proposes the combined use of the FDR and electromagnetic induction (EMI) sensors to measure and map FTSW. A strong correlation (R2 = 0.86) between FTSW and EM38 bulk electrical conductivity was found. As a result, field changes of FTSW are due to the variability of soil water content and soil texture. As with the data acquired in the field, more structured patterns occurred after a wetting event, indicating the presence of subsurface flow or root water uptake paths. After assessing the relationship between the soil and crop water status, the FTSW domain includes a critical value, estimated around 0.38, below which a strong reduction of relative transpiration can be recognized.

ACS Style

Giovanni Rallo; Giuseppe Provenzano; Mirko Castellini; Àngela Puig Sirera. Application of EMI and FDR Sensors to Assess the Fraction of Transpirable Soil Water over an Olive Grove. Water 2018, 10, 168 .

AMA Style

Giovanni Rallo, Giuseppe Provenzano, Mirko Castellini, Àngela Puig Sirera. Application of EMI and FDR Sensors to Assess the Fraction of Transpirable Soil Water over an Olive Grove. Water. 2018; 10 (2):168.

Chicago/Turabian Style

Giovanni Rallo; Giuseppe Provenzano; Mirko Castellini; Àngela Puig Sirera. 2018. "Application of EMI and FDR Sensors to Assess the Fraction of Transpirable Soil Water over an Olive Grove." Water 10, no. 2: 168.