scholarly journals Supplemental irrigation for improved rainfed agriculture in WANA region.

2009 ◽  
pp. 182-196 ◽  
Author(s):  
T. Oweis ◽  
A. Hachum
Keyword(s):  
Rainfed Agriculture ◽  
Supplemental Irrigation

scholarly journals Mitigation effect of dry spells in Sahelian rainfed agriculture: Case study of supplemental irrigation in Burkina Faso

2015 ◽  
Vol 10 (16) ◽  
pp. 1863-1873 ◽  
Author(s):  
Chaim Doto Vivien ◽  
Yacouba Hamma ◽  
Niang Dial ◽  
Lahmar Rabah ◽  
Kossi Agbossou Euloge
Keyword(s):  
Burkina Faso ◽  
Rainfed Agriculture ◽  
Supplemental Irrigation ◽  
Dry Spells

Food and water insecurity: re-assessing the value of rainfed agriculture

2005 ◽  
Vol 5 (1) ◽  
pp. 109-116 ◽  
Author(s):  
M. Ahmad ◽  
A. Rodríguez ◽  
A. Braslavskaya
Keyword(s):  
Economic Policy ◽  
Agricultural Production ◽  
Economic Incentives ◽  
Irrigated Agriculture ◽  
Rainfed Agriculture ◽  
Policy Environment ◽  
Wheat Varieties ◽  
Large Country ◽  
Supplemental Irrigation ◽  
Irrigation Technology

Rainfed agriculture has potential to produce needed cereals for the growing populations of West and Central Asia even though rainfed agriculture is perceived as risky. The value of rainfed agriculture to produce competitively should be re-assessed. This requires the concerted efforts of farmers, researchers, and policy makers to work on the technical factors that determine agricultural production as well as to address the economic policy environment. Syria is a small country with a diversified rainfed and irrigated agriculture. Rainfed and supplemental irrigation technology has improved Syria's food self-reliance, however, the policy environment is not conducive to the sustainable use of natural resources. Supplemental irrigation technology to produce wheat is used to illustrate the need to address both the technical issues as well as the economic incentives to make agricultural production competitive. Kazakhstan is a large country with a predominantly rainfed agriculture. Farmers could benefit from rainfall probabilities to use fertilizer and improved wheat varieties under rainfed agriculture as Syria did during the eighties and nineties. Implicit taxation of farmers needs to be removed and access to markets must be ensured for farmers in Kazakhstan to benefit from international wheat prices. While it is important to improve production technology, the economic policy environment needs to be addressed first to create incentives for farmers to produce commodities competitively in water-scarce regions.

scholarly journals EVALUATION OF RAINFED AGRICULTURE MANAGEMENT PRACTICES AS AN APPROACH FOR SUSTAINABILITY IN NORTHWESTERN COAST (NWC), EGYPT

2021 ◽  
Vol 9 (10) ◽  
pp. 190-203
Author(s):  
Omnia Mohamed Wassif ◽  
Keyword(s):  
Soil Quality ◽  
Management Practices ◽  
Crop Yields ◽  
Irrigation System ◽  
Irrigation Management ◽  
Relative Yield ◽  
Class I ◽  
Rainfed Agriculture ◽  
Soil Quality Index ◽  
Supplemental Irrigation

Sustainable development can be possible in rainfed agriculture by integrated approach of soil management measures. Soil quality in the form of a quantitative index is used as an indicator of environmental quality and sustainability. Twelve farms selected to achieve the targets of the present investigation (six farms under traditional rainfed agriculture system and six farms under rainfed with supplemental irrigation) at Northwestern Coastal Zone (NWCZ). These farms varied in land use and management practices concerning fertilization practices, tillage system, crop type and cultivated period. This study selected some soil indicators vis-à -vis soil physicochemical properties of the selected farms of studied areas at NWCZ. The rating of soil quality index (SQI) and relative of soil quality (RSQI) values in this study were higher towards to rainfed agriculture with supplement irrigation farms than in traditional rainfed farms. In addition, most of the values of soil quality change (∆RSQI) were moderately increase (class II) and most of these farms were under traditional rainfed management. The results of cumulative rating index CRI showed a negative correlation and significant relationship with RSQI (R2=0.82, p<0.05). concerning the impacts of soil quality on productivity, the relationship between relative yield (Ry %) and RSQI was positive significant correlation (R2=0.78, p<0.05). Also, CRI showed negative significant correlation with Ry% (R2=0.81, p<0.05). Moreover, the highly soil quality class I, highly sustainability, low changes in soil quality and highly crop yield observed was in the farms under rainfed with supplemental irrigation system and good fertilization practices (NPK+organic manure). So, this study recommended to expansion rainfed with supplemental irrigation management system and add suitable dose of NPK application with manure along scientific lines to encourage crop yields that can be achieved on a sustainable basis, but it need a long time to reach class I quality and highly sustainable status.

Annual Evapotranspiration and Crop Coefficients of Ligustrum japonica Growing in Three Container Sizes

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 512c-512
Author(s):  
R.C. Beeson
Keyword(s):  
Reference Evapotranspiration ◽  
Actual Evapotranspiration ◽  
Rooted Cuttings ◽  
Supplemental Irrigation ◽  
Mean Size ◽  
Crop Coefficients ◽  
Marketable Size

The objective of this study was to determine crop coefficients (KC) for Ligustrum japonica growing in three container sizes using the Penman equation to calculate reference evapotranspiration (ETR). Rooted cuttings were transplanted into 3-liter containers and upcanned as needed into 10- and 23-L containers. Production was scheduled such that a series of plants in each container size were about 2 months from commercial marketable size every 4 months. Beginning 1 Jan. 1995 until 31 Dec. 1996, three uniform plants of each size were suspended in weighing lysimeters and surrounded by similar size plants filling an area 3.7 by 4.9 m. Plants within each area were overhead irrigated at 2000 h as needed, based on a 30% moisture allowed deficit. Plants were exchanged every 4 months such that the annual mean size was that of a marketable plant. Actual evapotranspiration (ETA) was calculated from half-hour measurements of each plant's weight and adjusted for rainfall. From these and daily calculated ETR, KC were determined for each size of container. KCs ranged from 1.06 to 1.50 when ETA was converted to mm/day based on allocated bed space. Comparisons of volumes of supplemental irrigation to ETA and effects of assumptions required in converting ETA to mm/day will be discussed.

Influence of Pruning and Irrigation on Root Longevity of `Concord' Vines

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 511a-511
Author(s):  
L.H. Comas ◽  
D.M. Eissenstat ◽  
A.N. Lakso ◽  
R. Dunst
Keyword(s):  
Fine Roots ◽  
Fine Root ◽  
Cultural Practices ◽  
Growing Season ◽  
Root Production ◽  
Root Dynamics ◽  
Supplemental Irrigation ◽  
Root Longevity ◽  
Root Lifespan ◽  
Median Lifespan

Improved cultural practices in grape require a better understanding of root growth and physiology. Seasonal root dynamics were examined in mature `Concord' vines with balanced or minimal-pruning, and with or without supplemental irrigation in Fredonia, N.Y. Fine roots were continuously produced during the growing season starting in mid-June around time of bloom. Roots began to die in September at verasion. Minimal-pruned vines produced more roots than balanced-pruned vines, with the minimal-pruned/unirrigated vines producing the most roots. Irrigation and pruning delayed fine root production at the beginning of the growing season. Peak fine root flush was 16 June to 21 July 1997 for the minimal-pruned/unirrigated treatment, while peak flush was 7 July to 2 Sept. 1997 for balanced-pruned/irrigated treatment. In minimal-pruned vines, many roots were observed down to depths of 120 cm. In contrast, balanced-pruned vines had very few fine roots deeper than 40 cm. From initial observations, median lifespan of fine roots was 5 to 9.5 weeks, depending on treatment and depth in soil. Fine roots lived longer in the top 15-cm than in the 16- to 30-cm layer of soil in all treatments. Both minimal pruning and irrigation increased root lifespan. Fine roots had the shortest lifespan in the balanced-pruned/unirrigated treatment and the longest lifespan in the minimal-pruned/irrigated treatment.

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