CERES-Rice Model to Define Management Strategies for Rice Production; Soil Moisture and Evapotranspiration Estimation during Drought Years—A Study over Parts of Madhya Pradesh, India

2018 ◽  
pp. 207-221
Author(s):  
Sourabh Shrivastava ◽  
S.C. Kar ◽  
Anu Rani Sharma
Keyword(s):  
Soil Moisture ◽  
Management Strategies ◽  
Rice Production ◽  
Madhya Pradesh ◽  
Evapotranspiration Estimation

Soil moisture assessment based on Sentinel 1/2 and in-situ data: The vineyard case study

2021 ◽  
Author(s):  
Maria Paula Mendes ◽  
Ana Paula Falcão ◽  
Magda Matias ◽  
Rui Gomes
Keyword(s):  
Soil Moisture ◽  
Climate Models ◽  
Root Zone ◽  
Irrigation Management ◽  
Management Strategies ◽  
Winter Period ◽  
Classification Algorithms ◽  
Precipitation Regime ◽  
Terrain Attributes ◽  
Sentinel 2

<p>Vineyards are crops whose production has a major economic impact in the Portuguese economy (~750 million euros) being exported worldwide. As the climate models project a larger variability in precipitation regime, the water requirements of vineyards can change and drip irrigation can be responsible for salt accumulation in the root zone, especially when late autumn and winter precipitation is not enough to leach salts from the soil upper horizons, turning the soil unsuitable for grape production.</p><p>The aim of this work is to present a methodology to map surface soil moisture content (SMC) in a vineyard, (40 hectares) based on the application of two classification algorithms to satellite imagery (Sentinel 1 and Sentinel 2). Two vineyard plots were considered and three field campaigns (December 2017, January 2018 and May 2018) were conducted to measure soil moisture contents (SMC). A geostatistical method was used to estimate the SM class probabilities according to a threshold value, enlarging the training set (i.e., SMC data of the two plots) for the classification algorithms. Sentinel-1 and Sentinel-2 images and terrain attributes fed the classification algorithms. Both methods, Random Forest and Logistic Regression, classified the highest SMC areas, with probabilities above 14%, located close to a stream at the lower altitudes.</p><p>RF performed very well in classifying the topsoil zones with lower SMC during the autumn-winter period (F-measure=0.82).</p><p>This delineation allows the prevention of the occurrence of areas affected by salinization, indicating which areas will need irrigation management strategies to control the salinity, especially under climate change, and the expected increase in droughts.</p>

Grass Growth in Response to Time of Rainfall and Season Along a Climate Gradient in Australian Rangelands.

1997 ◽  
Vol 19 (1) ◽  
pp. 95 ◽  
Author(s):  
BH Walker ◽  
FR Mcfarlane ◽  
JL Langridge
Keyword(s):  
Soil Moisture ◽  
Perennial Grass ◽  
Management Strategies ◽  
The Other ◽  
Green Leaf ◽  
Grass Species ◽  
Seasonal Growth ◽  
Available Soil Moisture ◽  
Time Of Year ◽  
Grass Growth

Percentage green leaf and height of the major perennial grass species was estimated fortnightly at six locations along a rainfall predictability gradient from Katherine (most predictable) to Lake Mere near Cobar (aseasonal), and regressed on estimated plant available soil moisture (PASM) and time of year (T). Green leaf is more strongly related to T at Katherine and to PASM at Lake Mere with the other sites in-between. Differences between species in terms of seasonal growth phenology were minor, at all sites, and there were no meaningful patterns in percentage contributions by the species to sward biomass. A strong inter-seasonal rainfall pattern over the period of the study may have masked phenological differences between species, but it is also possible that changes in species composition very soon after livestock were introduced resulted in a decline in phenological differentiation. Whatever the reason, the differences observed in this study would ~ot warrant their use in the formulation of management strategies.

scholarly journals Ecological Characteristics of Ventenata dubia in the Intermountain Pacific Northwest

2015 ◽  
Vol 8 (1) ◽  
pp. 57-71 ◽  
Author(s):  
John M. Wallace ◽  
Pamela L. S. Pavek ◽  
Timothy S. Prather
Keyword(s):  
Life History ◽  
Soil Moisture ◽  
Pacific Northwest ◽  
Seed Bank ◽  
Life History Traits ◽  
Seedling Emergence ◽  
Management Strategies ◽  
Integrated Weed Management ◽  
Habitat Types ◽  
Wide Range

AbstractVentenata dubia is an exotic winter annual grass that has invaded Conservation Reserve Program (CRP) lands, improved pastures, intensively managed hay fields, and rangelands within the Intermountain Pacific Northwest (PNW). Currently, producers are attempting to develop V. dubia management strategies with little knowledge of its life history traits. We conducted several studies to characterize V. dubia life history patterns. Preliminary germination trials were completed to describe primary and secondary dormancy characteristics. Field studies were conducted to evaluate (1) seed bank persistence patterns, (2) seedling emergence patterns under V. dubia litter, and (3) seedling emergence and phenological development patterns within timothy hay, CRP, and rangeland habitats. Preliminary germination trials suggest that the after-ripening period required for loss of dormancy does not exceed 30 d and that dormancy breakdown peaks at approximately 90 d, after which germination occurs over a wide range of temperatures (9 to 29 C). A small fraction (< 1%) of the seed bank remained germinable up to 3 yr after burial at 2 cm depth in a grassland habitat. Seedling emergence and survival was significantly greater under high V. dubia litter layers (100% cover) compared with bare surface during the drier study year because of higher soil moisture levels maintained under litter. Across habitat types, mean seedling emergence (50% of total) occurred between 33 and 94 growing degree days (GDD) after soil moisture rose above the permanent wilting point in the fall. Seedling emergence periodicity varied among habitat types in relation to spring seedling emergence, ranging from 0 to 13% of total emergence per year. Phenological development differed across sites and years by up to several hundred GDDs but was closely aligned to Julian days. This collection of studies improves our understanding of V. dubia life history traits and will aid integrated weed management strategies in the Intermountain PNW.

scholarly journals Design of a Monitoring System for Hydroganics based on Arduino Uno R3 to Realize Sustainable Development Goal`s number 2 Zero Hunger

2021 ◽  
Vol 3 (1) ◽  
pp. 50-56
Author(s):  
Anggara Trisna Nugraha ◽  
Dadang Priyambodo
Keyword(s):  
Soil Moisture ◽  
Monitoring System ◽  
Water Discharge ◽  
Rice Production ◽  
Rice Quality ◽  
Moisture Sensor ◽  
Self Sufficiency ◽  
Average Water ◽  
Arduino Uno ◽  
Zero Hunger

In 2019 Indonesia is able to support its nation and does not need rice imports from abroad. This situation is called rice self-sufficiency. Then in order to maintain rice self-sufficiency from year to year, it is necessary to apply technology to increase the quality of rice production. Therefore, a Hydroganic Monitoring System Design was created which is used to monitor plant watering automatically using the YL-69 soil moisture sensor controlled by Arduino Uno and instructed to the LCD to display the soil moisture value according to soil pH in real time. The watering system that has been created can automatically drain water to the plants. The water that is flowed automatically by this system comes from the fish pond that is right below it, where the water from fish excrement will produce organic nutrients for rice plants. With this research, rice production will grow more effectively to improve rice quality. With this research, it is expected that Indonesian rice production will increase effectively and in line with the improvement of rice quality. From the research that has been conducted, it is found that from the experimental data above, it can be calculated that the average water discharge in one irrigation is 2.37 m/s.

scholarly journals Nitrogen Fertilizer Management Strategies for Rice Production in Bangladesh

2013 ◽  
Vol 56 (3) ◽  
pp. 167-174
Author(s):  
Abu Turab Mohammad Ali Choudhury ◽  
Mohammad Abu Saleque ◽  
Shafiuddin Kaisar Zaman ◽  
Nurul Islam Bhuiyan ◽  
Abdul Latif Shah ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Management Strategies ◽  
Rice Production ◽  
Fertilizer Management

scholarly journals Effects of Irrigation on Wine Grape Growth and Fruit Quality

2000 ◽  
Vol 10 (1) ◽  
pp. 162-168 ◽  
Author(s):  
Richard Allen Hamman ◽  
Imed Eddine Dami
Keyword(s):  
Soil Moisture ◽  
Fruit Quality ◽  
Cold Hardiness ◽  
Sugar Content ◽  
Soluble Sugar ◽  
Irrigation Management ◽  
Management Strategies ◽  
Field Studies ◽  
Fruit Weight ◽  
Wine Quality

Field studies were conducted to determine the effect of three drip irrigation regimes on grapevine growth, juice and wine quality, soil moisture, cold hardiness of bud and cane tissues and soluble sugar content of cortical cane tissues of Vitis vinifera, Linnaeus `Cabernet Sauvignon'. This study was developed to help provide some irrigation management strategies that would improve fruit quality and reduce excessive vigor. Irrigation treatments of 192, 96, and 48 L (51, 25, and 13 gal) per vine per week were initiated at bud break until veraison (initiation of berry color) and then reduced by 25% through harvest. Significant differences of fruit weight per vine, crop load, soil moisture, average berry and cluster weight, shoot length and pruning weight per meter of canopy row were observed among treatments. Juice and wine compositions and wine color were also significantly different; however, cold hardiness and soluble sugar contents did not differ between treatments.

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