scholarly journals Estimation of water retention and availability in soils of Rio Grande do Sul

2009 ◽  
Vol 33 (6) ◽  
pp. 1547-1560 ◽  
Author(s):  
José Miguel Reichert ◽  
Jackson Adriano Albuquerque ◽  
Douglas Rodrigo Kaiser ◽  
Dalvan José Reinert ◽  
Felipe Lavarda Urach ◽  
...  
Keyword(s):  
Soil Properties ◽  
Water Retention ◽  
Rio Grande ◽  
Irrigation Scheduling ◽  
Pedotransfer Functions ◽  
Rio Grande Do Sul ◽  
Water Capacity ◽  
Available Water ◽  
Available Water Capacity ◽  
Plant Available Water

Dispersed information on water retention and availability in soils may be compiled in databases to generate pedotransfer functions. The objectives of this study were: to generate pedotransfer functions to estimate soil water retention based on easily measurable soil properties; to evaluate the efficiency of existing pedotransfer functions for different geographical regions for the estimation of water retention in soils of Rio Grande do Sul (RS); and to estimate plant-available water capacity based on soil particle-size distribution. Two databases were set up for soil properties, including water retention: one based on literature data (725 entries) and the other with soil data from an irrigation scheduling and management system (239 entries). From the literature database, pedotransfer functions were generated, nine pedofunctions available in the literature were evaluated and the plant-available water capacity was calculated. The coefficient of determination of some pedotransfer functions ranged from 0.56 to 0.66. Pedotransfer functions generated based on soils from other regions were not appropriate for estimating the water retention for RS soils. The plant-available water content varied with soil texture classes, from 0.089 kg kg-1 for the sand class to 0.191 kg kg-1 for the silty clay class. These variations were more related to sand and silt than to clay content. The soils with a greater silt/clay ratio, which were less weathered and with a greater quantity of smectite clay minerals, had high water retention and plant-available water capacity.

scholarly journals Application of Multi-Component Conditioner with Clinoptilolite and Ascophyllum nodosum Extract for Improving Soil Properties and Zea mays L. Growth and Yield

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2005
Author(s):  
Jacek Długosz ◽  
Anna Piotrowska-Długosz ◽  
Karol Kotwica ◽  
Ewelina Przybyszewska
Keyword(s):  
Zea Mays ◽  
Soil Properties ◽  
Management Practices ◽  
Zea Mays L ◽  
Growth And Yield ◽  
Water Capacity ◽  
Available Water ◽  
Available Water Capacity ◽  
Study Sites ◽  
Plant Properties

The application of various conditioners in agriculture is one of the management practices used to improve soil quality and plant growth and development. The aim of this study was to assess the effect of a multi-component conditioner on the selected soil properties and maize (Zea mays L.) growth and yield. The effect of a conditioner on a set of soil properties and maize growth and yield was studied in one-year experiments carried out at three study sites, which were under a conventional tillage system. All of the study sites were located on farms in three geographic mezoregions in the Kuyavian-Pomeranian Region (Midwestern Poland). The studied soils were Haplic Luvisol (Janocin and Kobylnica) and Albic Luvisols (Krukówko) that were composed of sandy loam. A one-way analysis of variance (ANOVA) was used to determine the effect of a conditioner Solactiv on the soil and plant properties. The conditioner significantly affected the soil enzyme activities such as dehydrogenase (DHA), fluorescein sodium salt hydrolysis level (FDAH) and carboxymethylcellulose cellulase (CMC—cellulase); wherein the last one increased by about 16–20%. The application of Solactiv also increased the available K content (about 11%) but not the content of the microbial biomass C and N. Total porosity (TP), which was significantly higher in the soil treated with conditioner than in the control soils, increased the available water capacity (AWC) (about 2.2%). The higher AWC in the treated soil indicated the greater contribution of the mesopores in the TP (about 4%). A significantly higher readily available water capacity (RAWC) and small pores available water capacity (SAWC) was determined in the treated soils compared to the controls. Of the plant properties, only plant height, fresh cob biomass (BBCH 87–89) and fresh plant biomass (BBCH 84–85) were significantly increased by the conditioner. The application of Solactiv is considered to be a promising approach for developing sustainable agriculture by improving the soil’s biological activity and water-related properties.

Estimating Plant-Available Water Capacity for Claypan Landscapes Using Apparent Electrical Conductivity

2007 ◽  
Vol 71 (6) ◽  
pp. 1902-1908 ◽  
Author(s):  
Pingping Jiang ◽  
Stephen H. Anderson ◽  
Newell R. Kitchen ◽  
Kenneth A. Sudduth ◽  
E. John Sadler
Keyword(s):  
Electrical Conductivity ◽  
Water Capacity ◽  
Available Water ◽  
Available Water Capacity ◽  
Plant Available Water ◽  
Apparent Electrical Conductivity

scholarly journals Mapping the Available Water Capacity in tropical climate soils for soybean (Glycine max) cultivation in the state of Tocantins-Brazil

2021 ◽  
Vol 16 (5) ◽  
pp. 1
Author(s):  
André De Moura Andrade ◽  
Rui Da Silva Andrade ◽  
Erich Collicchio
Keyword(s):  
Soil Water ◽  
Water Availability ◽  
The State ◽  
Pedotransfer Functions ◽  
Water Retention Curve ◽  
Soil Water Retention Curve ◽  
Potential Threat ◽  
Water Capacity ◽  
Available Water ◽  
Available Water Capacity

Brazilian soybean has undergone considerable economic growth. Its production depends on the demand for some inputs. One of these inputs is the soil water supply, which can be made artificially or obtained by natural rainfall. Knowledge of available water capacity (AWC), which depends on total water availability (TWA), is poorly accessible and difficult to measure in the field. This study aimed to map the AWC of the state of Tocantins, based on pedotransfer functions (PTFs), to evaluate the water availability of the soils of the microregions of that state. We used the Arya and Paris model, aided by a computer program, Qualisolo, made by Embrapa Instrumentação. One hundred fifty-seven tropical soil samples were extracted from the Embrapa Solos portal. Preliminarily, the soil water retention curve (SWRC) was obtained and, subsequently, the TWA and AWC for this oilseed were estimated. Multiple linear regressions show the correlation between TWA and clay (CL), Silt (ST) and total sand (TS) contents. The correlation established was TWA = 3.2993 – 0.0028TS – 0.0034CL. This main conclusion reflects a fruitful AWC for decision-making by the soybean agribusiness and exposes the regional weaknesses for this crop under a rainfed regime in some regions of Tocantins. We could observe that, in terms of water availability, agribusiness is a potential threat to the environment protection area (APA) of the Ilha do Bananal/Cantão, Formoso River microregion.

Estimation of the plant available water capacity of a soil profile

Soil Research ◽  
1981 ◽  
Vol 19 (3) ◽  
pp. 197 ◽  
Author(s):  
JA Mullins
Keyword(s):  
Electrical Conductivity ◽  
Soil Profile ◽  
Feature Model ◽  
Alternative Technique ◽  
Dryland Agriculture ◽  
Water Capacity ◽  
Available Water ◽  
Available Water Capacity ◽  
Conductivity Profile ◽  
Plant Available Water

The plant available water capacity (PAWC) was measured for a range of soils (black earths, grey, brown and red clays, krainozems, yellow earths and solodized solonetz/solodics) used for dryland agriculture in the uplands of th,- eastern Darling Downs of Queensland. Using these data, two one-parameter models - one based on the electrical conductivity profile and the other on observable profile features - were derived for estimating the PAWC of the soil profile. The electrical conductivity profile model reliably estimated the PAWC for black earths and grey, brown and red clays. In the case of the deep, black earths, it accounted for 90% of the variation. The observable profile feature model reliably estimated the PAWC for black earths and grey, brown and red clays and in the case of the grey, brown and red clays accounted for 88% of the variation. The models for the solodized solonetz/solodics were not significant. In addition the profile feature model provided estimates of PAWC for the krasnozems (grouped with black earths) and for the yellow earths and solodized solonetz/solodics as a group. An alternative technique for the estimation of PAWC for krasnozems and yellow earths is also presented. The techniques will provide a rapid first appraisal of the PAWC of a soil profile.

Advances in precision agriculture in south-eastern Australia. IV. Spatial variability in plant-available water capacity of soil and its relationship with yield in site-specific management zones

2009 ◽  
Vol 60 (9) ◽  
pp. 885 ◽  
Author(s):  
M. A. Rab ◽  
P. D. Fisher ◽  
R. D. Armstrong ◽  
M. Abuzar ◽  
N. J. Robinson ◽  
...  
Keyword(s):  
Grain Yield ◽  
Soil Properties ◽  
Clay Content ◽  
High Yield ◽  
Site Specific ◽  
Management Zones ◽  
Water Capacity ◽  
Available Water ◽  
Plant Available Water ◽  
The Mean

Spatial variability in grain yield can arise from variation in many different soil and terrain properties. Identification of important sources of variation that bear significant relationship with grain yield can help achieve more effective site-specific management. This study had three aims: (i) a geostatistical description/modelling of the paddock-level spatial structure in variability of plant-available water capacity (PAWC) and related soil properties, (ii) to determine optimal number of management zones in the paddock, and (iii) to assess if the variability in PAWC and related soil properties is significantly associated with the variability in grain yield across the management zones. Particle size distribution, bulk density (BD), field capacity (FC), permanent wilting point (PWP), and soil water content (SWC) at sowing were measured at 4 soil depths (to 0.60 m) at 50 representative spatial sampling locations across a paddock near Birchip (Victoria). PAWC and plant-available water at sowing (PAWs) were derived from these data. Moderate to strong spatial dependence across the paddock was observed. The magnitude of the structural variation and of range varied widely across different soil properties and depths. The south-east edge and the central areas of the paddock had higher clay content, FC, PWP, PAWC, and lower PAWs. The paddock was divided into 6 potential management zones using combined header yield and normalised difference vegetation index (NDVI). The adequacy of zoning was evaluated using relative variability (RV) of header yield and soil properties. The mean RV for 3 zones differed little from that of 6 management zones for header yield and for each measured soil property, indicating division of the paddock into 3 zones to be adequate. The results from residual maximum likelihood (ReML) analysis showed that low yield zones had significantly higher clay content, FC, PWP, SWC, and PAWC and significantly lower PAWs than both medium and high yield zones. The mean FC, PWP, and PAWC in the low yield zones were, respectively, 25%, 26%, and 28% higher, and PAWs 36% lower than their corresponding values in the high yield zones. Linear regression analysis indicated that 59–96% of the observed variation in grain yield across management zones could be explained by variation in PWP. The practical implications of these results are discussed.

scholarly journals DISPONIBILIDADE DE ÁGUA E PRODUÇÃO DE ARROZ EM FUNÇÃO DE DOSES DE CONCENTRADO ZEOLÍTICO

Irriga ◽  
2009 ◽  
Vol 14 (2) ◽  
pp. 123-134 ◽  
Author(s):  
Alberto Carlos de Campos Bernardi ◽  
Fernando Campos Mendonça ◽  
Patrick Gesualdi Haim ◽  
Carlos Guarino Werneck ◽  
Marisa Bezerra de Melo Monte
Keyword(s):  
Rio De Janeiro ◽  
Water Retention ◽  
Growth And Yield ◽  
Water Retention Curve ◽  
Natural Soil ◽  
Natural Occurrence ◽  
Water Capacity ◽  
Rice Growth ◽  
Available Water ◽  
Available Water Capacity

DISPONIBILIDADE DE ÁGUA E PRODUÇÃO DE ARROZEM FUNÇÃO DE DOSESDE CONCENTRADO ZEOLÍTICO  Alberto Carlos de Campos Bernardi1; Fernando Campos Mendonça1; Patrick Gesualdi Haim2; Carlos Guarino Werneck2; Marisa Bezerra de Melo Monte31Embrapa Pecuária Sudeste, São Carlos, SP, [email protected] Federal Rural do Rio de Janeiro, Seropédica, RJ3Centro de Tecnologias Minerais, Rio de Janeiro, RJ  1 RESUMO O uso de condicionadores no solo possibilita aumentar a capacidade de retenção de água e nutrientes dos solos arenosos. As zeólitas são minerais alumino-silicatos cristalinos hidratados, estruturados em redes tridimensionais rígidas e de ocorrência natural e que podem ser utilizados como condicionador natural do solo. O objetivo deste trabalho foi avaliar o efeito de doses de um concentrado do mineral zeólita sobre a retenção de água de um Neossolo Quartzarênico e a produção do arroz em duas frequências de irrigação. Os tratamentos utilizados foram 4 níveis do concentrado zeolítico: testemunha, 33,3; 66,7 e 100,0 gkg-1 de solo. As plantas de arroz foram cultivadas com irrigação diária e com intervalos de um dia. Os resultados indicam que, com o uso do concentrado zeolítico, foi possível aumentar a retenção e disponibilidade de água no solo. Houve aumentos em relação à testemunha de 10, 38 e 67% na capacidade de água disponível (CAD) e de 15%; 51% e 111% na água facilmente disponível (AFD) para as doses de 33,3; 66,7 e 100,0 g kg-1. O crescimento e da produção de arroz aumentaram com a elevação da doses de concentrado zeolítico com um intervalo de um dia entre as irrigações. UNITERMOS: estilbita, curva de retenção de água, capacidade de água disponível, modelo de van Genuchten.  BERNARDI, A. C. de C.; MENDONÇA, F. C.; HAIM, P. G.; WERNECK, C. G.; MONTE, M. B. de M. WATER AVAILABILITY AND RICE YIELD DUE TO LEVELS OF ZEOLITIC CONCENTRATE  2 ABSTRACT The use of soil conditioners are an alternative to improve soil water and nutrient retention. Zeolites are hydrated crystalline aluminate-silicates structured in rigid three-dimensional nets with natural occurrence which can be used as a natural soil conditioner. The main objective of this research was evaluating the effect of levels of a mineral zeolite concentrate on the water retention and available water capacity of an Entisol (Sandyl/Quartzipsament) and the rice growth and yield in two irrigation frequencies. Treatments consisted of  4 levels of the zeolitic concentrate: control, 33.3; 66.7 and 100.0 gkg-1. Rice was grown with daily irrigation and one day interval. Results indicated that the zeolitic concentrate increased the water retention and availability of the sandy soil. Available water capacity increased 10, 38 and 67% and easily available water  increased 15, 51 and 111% in relation to the control, respectively, with the use of 33.3; 66.7 and 100.0 g kg-1. The highest levels of zeolite made possible the maintenance of the rice growth and the yield with a one-day interval between the irrigations. KEYWORDS: water retention curve, available water capacity, van Genuchten model.

How well do we need to estimate plant-available water capacity to simulate water-limited yield potential?

2019 ◽  
Vol 212 ◽  
pp. 441-447 ◽  
Author(s):  
Renye Wu ◽  
Roger Lawes ◽  
Yvette Oliver ◽  
Andrew Fletcher ◽  
Chao Chen
Keyword(s):  
Yield Potential ◽  
Water Capacity ◽  
Available Water ◽  
Available Water Capacity ◽  
Plant Available Water
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