Plant available water holding capacity of soil under chemically modified biochars

Rhizosphere ◽  
2021 ◽  
pp. 100469
Author(s):  
Kazem Ghassemi-Golezani ◽  
Salar Farhangi-Abriz
Keyword(s):  
Water Holding Capacity ◽  
Chemically Modified ◽  
Available Water ◽  
Plant Available Water ◽  
Water Holding

scholarly journals 491 PB 163 A METHOD FOR QUANTIFYING PLANT AVAILABLE WATER-HOLDING CAPACITY AND WATER ABSORPTION POTENTIAL IN CONTAINER MEDIA UNDER PRODUCTION CONDITIONS

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 501f-501 ◽  
Author(s):  
William R. Argo ◽  
John A. Biernbaum
Keyword(s):  
Water Absorption ◽  
Efficient Method ◽  
Water Holding Capacity ◽  
Wetting Agent ◽  
Available Water ◽  
Root Medium ◽  
Absorption Potential ◽  
Plant Available Water ◽  
The Difference ◽  
Water Holding

Hybrid impatiens were grown in 15 cm pots containing one of six root medium. After seven weeks, plant available water holding capacity (AWHC) was measured as the difference between the drained weight of the plant and pot after a one hour saturation and the weight of the pot when the plant wilted. Water absorption potential (WAP) was calculated as the capacity of each root medium to absorb applied irrigation water up to the AWHC and was measured at two moisture levels with top watering (two leaching fractions), drip irrigation (two leaching fractions) and flood subirrigation. Top watering moist media (initial AWHC = 35%) with leaching fractions of 30+ % was me most efficient method of rewetting media and was the only irrigation method tested to obtain WAP's of 100%. In comparison, flood subirrigation was the least efficient method of rewetting media with WAP of 27% for dry media (initial AWHC = 0%), and obtained a total WAP of 55% for moist media (initial AWHC = 23%). In media comparisons, the incorporation of a wetting agent into a 70% peat/30% bark mix at planting increased the WAP compared to the same media without a wetting agent with nine of the ten irrigation treatments.

Phenologic metrics derived from MODIS NDVI as indicators for Plant Available Water-holding Capacity

2016 ◽  
Vol 60 ◽  
pp. 1263-1272 ◽  
Author(s):  
Sofanit Araya ◽  
Greg Lyle ◽  
Megan Lewis ◽  
Bertram Ostendorf
Keyword(s):  
Water Holding Capacity ◽  
Modis Ndvi ◽  
Available Water ◽  
Plant Available Water ◽  
Water Holding

scholarly journals Mapping rootable depth and root zone plant-available water holding capacity of the soil of sub-Saharan Africa

Geoderma ◽  
2018 ◽  
Vol 324 ◽  
pp. 18-36 ◽  
Author(s):  
Johan G.B. Leenaars ◽  
Lieven Claessens ◽  
Gerard B.M. Heuvelink ◽  
Tom Hengl ◽  
Maria Ruiperez González ◽  
...  
Keyword(s):  
Root Zone ◽  
Water Holding Capacity ◽  
Sub Saharan Africa ◽  
Available Water ◽  
Plant Available Water ◽  
Sub Saharan ◽  
Water Holding

scholarly journals Effect of bentonite as a soil amendment on field water-holding capacity, and millet photosynthesis and grain quality

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Junzhen Mi ◽  
Edward G. Gregorich ◽  
Shengtao Xu ◽  
Neil B. McLaughlin ◽  
Jinghui Liu
Keyword(s):  
Soil Amendment ◽  
Grain Quality ◽  
Net Photosynthesis ◽  
Quality Parameters ◽  
Water Holding Capacity ◽  
Dry Matter Accumulation ◽  
Available Water ◽  
Plant Available Water ◽  
Water Holding ◽  
Semi Arid

Abstract A field experiment was conducted in a semi-arid region in northern China to evaluate the effects of bentonite soil amendment on field water-holding capacity, plant available water, and crop photosynthesis and grain quality parameters for millet [Setaria italic (L.) Beauv.] production over a 5-year period. Treatments included six rates of bentonite amendments (0, 6, 12, 18, 24 and 30 Mg ha−1) applied only once in 2011. The application of bentonite significantly (P < 0.05) increased field water-holding capacity and plant available water in the 0–40 cm layer. Bentonite also significantly (P < 0.05) increased the emergence rate, above-ground dry matter accumulation (AGDM), net photosynthesis rate (Pr), transpiration rate (Tr), soil and plant analysis development (SPAD) and leaf water use efficiency (WUE). It also increased grain quality parameters including grain protein, fat and fiber content. Averaged over all the years, the optimum rate of bentonite was 24 Mg ha−1 for all plant growth and photosynthesis parameters except for grain quality where 18 Mg ha−1 bentonite had the greatest effect. This study suggests that bentonite application in semi-arid regions would have beneficial effects on crop growth and soil water-holding properties.

AVAILABLE WATER-HOLDING CAPACITY MAPS OF ALBERTA, SASKATCHEWAN AND MANITOBA

1988 ◽  
Vol 68 (1) ◽  
pp. 157-163 ◽  
Author(s):  
R. DE JONG ◽  
J. A. SHIELDS
Keyword(s):  
Key Words ◽  
Soil Water ◽  
Water Holding Capacity ◽  
Crop Modelling ◽  
Available Water ◽  
Soil Landscape ◽  
Water Holding

Available water-holding capacity (AWC) maps of Alberta, Saskatchewan and Manitoba were derived from Soil Landscape maps (1:1 million scale) by substituting AWC classes for soil textural classes. The maps provide information required for the geographical interpretation of soil water and crop modelling analyses. Key words: Available water-holding capacity, maps, texture

Site Quality Evaluation Models for Aspen (Populustremuloides Michx.) in Wisconsin

1975 ◽  
Vol 5 (4) ◽  
pp. 523-528 ◽  
Author(s):  
James S. Fralish ◽  
Orie L. Loucks
Keyword(s):  
Site Index ◽  
Water Holding Capacity ◽  
Site Quality ◽  
Quaking Aspen ◽  
North Central ◽  
Available Water ◽  
Soil Calcium ◽  
Calcium Magnesium ◽  
Regression Techniques ◽  
Water Holding

Soil and site relationships were studied in 32 mature quaking aspen (Populustremuloides Michx.) communities in north central Wisconsin. Multiple linear regression techniques indicated that soil texture, available water-holding capacity, water-table depth, and stand exposure were the most important factors controlling site index. Two models developed from combinations of these factors accounted for 62% of the variation in site index. Values for soil calcium, magnesium, potassium, and phosphorus were corrected for bulk density and summed to 12-, 24-, 36-, and 60-in. depths. When included in additional models, only magnesium to a 60-in. depth was found to have additional effect on aspen growth over and above that implicit in available water-holding capacity. The models were validated using 10 additional mature aspen stands and then applied to data from 10 stands in early stages of deterioration.

ESTIMATED SOIL WATER RESERVES APPLICABLE TO A WHEAT-FALLOW ROTATION FOR GENERALIZED SOIL AREAS MAPPED IN SOUTHERN SASKATCHEWAN

1984 ◽  
Vol 64 (4) ◽  
pp. 667-680 ◽  
Author(s):  
R. DE JONG ◽  
J. A. SHIELDS ◽  
W. K. SLY
Keyword(s):  
Soil Moisture ◽  
Soil Water ◽  
Water Holding Capacity ◽  
Climatic Data ◽  
Moisture Budget ◽  
Model Soil ◽  
Available Water ◽  
Soil Zone ◽  
Water Holding ◽  
Soil Moisture Budget

Long-term mean soil water reserves for a spring wheat-fallow rotation in the southern half of Saskatchewan were calculated using the Versatile Soil Moisture Budget. Four different available water-holding capacity classes and climatic data from 53 stations were used as input to the model. Soil water reserve data for the following times, seeding on 1 May in the crop year, at heading on 30 June, and on 1 May in the fallow year, were mapped. These were then combined with an available water-holding capacity map to portray in a single map the combined droughtiness due to climatic and soil attributes. Estimated soil water reserves compared well with measured data from one location in the Brown soil zone. The temporal and spatial changes in water reserves are discussed and related to summerfallowing. The maps provide information for use in making potential grain yield estimates. Key words: Soil water, wheat-fallow rotation, generalized soil areas, Saskatchewan, Versatile soil moisture budget

Sign in / Sign up

Export Citation Format

Share Document