ASSESSMENT OF LAND SUITABILITY AND WATER RESOURCES FOR DIFFERENT CROPS IN KHARGA – NEW VALLEY –EGYPT.

There has been limited research conducted on irrigation potential in Uganda. The existing studies provide a wide number of estimates of irrigation potential for Uganda and thus constrain reliable medium term planning and investment in the subsector. This research was aimed at assessing the potential for irrigation development in Nebbi District, which cover 195,300 km2, with a view of guiding planning and strategic investment in irrigation. Irrigation potential was assessed as an aggregation of the land suitability, water requirement and the available water for irrigation for three systems (drip, sprinkler and surface). Land suitability evaluation for the three systems was determined based upon topography and soil characteristics. The FAO CROPWAT model was used to determine the water requirements for the selected crops. Water resources assessment was carried out using rainfall data and the stream flow analysis of the available water resources in the study area. For surface irrigation, no area was classified as highly suitable or moderately suitable. Only 0.03% (48.91 ha) is marginally suitable, 36% (68,445.55 ha) currently not suitable whereas 64% (121,606.33 ha) permanently not suitable. For drip irrigation, 58.7% (111,591 ha) is marginally suitable and 25.8% (49,084 ha) is moderately suitable. Furthermore, 15% (28,492 ha) and 0.5% (989 ha) are currently not suitable and permanently not suitable respectively. There was no area classified as highly suitable under drip irrigation. For sprinkler irrigation, 14.1% (26 815.8 ha) of the area is marginally suitable and 0.03% (48.1 ha) is classified as moderately suitable for sprinkler irrigation. 47.5% (90 291.4 ha) and 38.4 % (72 987.2 ha) of the area is currently not suitable and permanently not suitable respectively. The mean capability index (Ci) for surface irrigation was 36.1 (currently not suitable), 45.4 (marginally suitable) for drip irrigation while sprinkler irrigation Ci was 42.8 (marginally suitable). Crop evapotranspiration (ETc) for the selected crops (tomatoes, cabbages and onions) varied from 2.46 to 5.76 mm/day; 2.87 to 5.92 mm/day and 2.87 to 4.78 mm/day respectively. The results from water resources assessment revealed that the total catchment yield was 2.69 x 109 m3 which permits irrigation for an area of 141,817.65 ha. The results showed that drip irrigation system was more suitable for the Nebbi district.

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Climate change and land suitability for potato production in England and Wales: impacts and adaptation

The Journal of Agricultural Science ◽

10.1017/s0021859611000839 ◽

2011 ◽

Vol 150 (2) ◽

pp. 161-177 ◽

Cited By ~ 38

Author(s):

A. DACCACHE ◽

C. KEAY ◽

R. J. A. JONES ◽

E. K. WEATHERHEAD ◽

M. A. STALHAM ◽

...

Keyword(s):

Climate Change ◽

Water Resources ◽

Water Availability ◽

Potato Production ◽

Land Suitability ◽

Geographical Information ◽

Climate Projections ◽

England And Wales ◽

Supplementary Irrigation ◽

Emissions Scenario

SUMMARYThe viability of commercial potato production is influenced by spatial and temporal variability in soils and agroclimate, and the availability of water resources where supplementary irrigation is required. Soil characteristics and agroclimatic conditions greatly influence the cultivar choice, agronomic husbandry practices and the economics of production. Using the latest (UKCP09) scenarios of climate change for the UK, the present paper describes a methodology using pedo-climatic functions and a geographical information system (GIS) to model and map current and future land suitability for potato production in England and Wales. The outputs identify regions where rainfed production is likely to become limiting and where future irrigated production would be constrained due to shortages in water availability. The results suggest that by the 2050s, the area of land that is currently well or moderately suited for rainfed production would decline by 88 and 74%, respectively, under the ‘most likely’ climate projections for the low emissions scenario and by 95 and 86%, respectively, for the high emissions scenario, owing to increased likelihood of dry conditions. In many areas, rainfed production would become increasingly risky. However, with supplementary irrigation, c. 0·85 of the total arable land in central and eastern England would remain suitable for production, although most of this is in catchments where water resources are already over-licensed and/or over-abstracted; the expansion of irrigated cropping is thus likely to be constrained by water availability. The increase in the volume of water required due to the switch from rainfed- to irrigated-potato cropping is likely to be much greater than the incremental increase in water demand solely on irrigated potatoes. The implications of climate change on the potato industry, the adaptation options and responses available, and the uncertainty associated with the land suitability projections, are discussed.

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Evaluation of Agricultural Land Suitability Based on RS, AHP, and MEA: A Case Study in Jilin Province, China

Agriculture ◽

10.3390/agriculture11040370 ◽

2021 ◽

Vol 11 (4) ◽

pp. 370

Author(s):

Cheng Han ◽

Shengbo Chen ◽

Yan Yu ◽

Zhengyuan Xu ◽

Bingxue Zhu ◽

...

Keyword(s):

Water Resources ◽

Agricultural Land ◽

Regional Scale ◽

Water Shortage ◽

Land Suitability ◽

Jilin Province ◽

Limiting Factors ◽

Available Phosphorus ◽

Element Analysis ◽

Surface Water Resources

The suitability evaluation of agricultural land at the regional scale is of great significance for protecting land and water resources and building sustainable agricultural systems. Based on climate, soil, topographical, and surface water resources, land suitability index (LSI) data for maize, rice, and soybeans are established using an analytical hierarchy process and matter element analysis (AHP–MEA) model in Jilin Province, China. The results show that there is a significant positive linear correlation between the LSI and the measured yield, which indicates that the model has an ideal effect and certain reference and extension significance. The main limiting factors for maize and soybean planting are pH, total nitrogen (TN), available phosphorus (AP), and soil texture, while water shortage limits rice planting. Different spatial structure optimization schemes for planting are established using the LSI and measured yield, along with economic indices. This study shows that the scheme that integrates policy and cost can make full use of land and water resources and promote the economic growth of agriculture. After optimization, the planting areas of maize, rice, and soybeans were 7.22, 2.44, and 0.71 million ha, respectively, representing an increase of 15.71 billion yuan over the agricultural GDP for the existing planting structure. It is expected that this study will provide a basis for follow-up studies on crop cultivation suitability.

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Arahan Struktur Tata Ruang Kawasan Agropolitan Kecamatan Baros Kabupaten Serang Provinsi Banten

Agrologia ◽

10.30598/a.v2i2.270 ◽

2018 ◽

Vol 2 (2) ◽

Author(s):

D. Ma’mun ◽

T. Karyani ◽

N Syamsiyah

Keyword(s):

Water Resources ◽

Sea Level ◽

Soil Texture ◽

Sandy Loam ◽

Land Suitability ◽

Food Crops ◽

High Porosity ◽

Local Potentials ◽

Unit Analysis

Baros is a district in Serang, Banten sub-district namely Baros. Sub-districts Baros has elevations between 112 m to 276 m above sea level (dpl), having a topographical 58 % flat and 42 % sloping. Soil texture was dominated by the texture of sandy loam and high porosity. The formation of regional agropolytant conformity land was based on analysis conducted by Bogor Agriculture Institute of land suitability in sub-district Baros for horticulture and food crops. Agopolytant are hoped to make synergy of the local potentials with the external potentials to be much more effecient. This research were conducted mainly to show that: 1) to identify economy activities to be developed in sub-district baros, 2) To give directions and desicision on the structure of the area for development of agropolytant in the Baros region. The method used were descriptive surveys with unit analysis on the subdistrict of Baros and the regency of Serang in Banten province. Results from the research showed the economy activities that could be more developed in the Baros subdistrict for developing agropolytant region through division of district such as: 1) Baros village would be the main farming spot. 2) Panyirapan and Sindangmandi village would be the back up or an assist for water resources, and 3) Sinarmukti, Sidawangi, Padasuka, Sukamanah, Sukaindah, Sukamenak, Cisalam, Curug agung, Tamansari, and Sukacai village would be the service as centres of the rice and horticulture production and developing agroforesty through intergrated farming

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Analisis Daya Dukung Lahan untuk Sawah Tadah Hujan di Kabupaten Pasaman Barat

Rona Teknik Pertanian ◽

10.17969/rtp.v10i1.7246 ◽

2017 ◽

Vol 10 (1) ◽

pp. 23-33

Author(s):

Feri Arlius ◽

Fadli Irsyad ◽

Delvi Yanti

Keyword(s):

Water Resources ◽

Water Balance ◽

Potential Field ◽

Growth Period ◽

Land Suitability ◽

Agricultural Technology ◽

Scoring Method ◽

Agricultural Engineering ◽

Balance Analysis ◽

Potential Land

Abstrak. Penambahan luas areal pengembangan sawah merupakan salah satu upaya untuk menjaga ketahanan pangan di Kabupaten Pasaman Barat yang dapat dilakukan dengan cara analisis daya dukung lahan untuk mengetahui potensi lahan, sehingga menghasilkan peta potensi lahan sawah tadah hujan di Kabupaten Pasaman Barat yang dapat memberikan informasi tentang tingkat kesesuaian lahan, distribusi dan luasan lahan pengembangan sawah di Kabupaten Pasaman Barat. Penelitian ini dilakukan dengan metode scoring dan overlay menggunakan softwareArc Gis 10 pada bulan Maret – April 2015 di Kabupaten Pasaman Barat dan Laboratorium Teknik Sumber Daya Lahan dan Air, Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Andalas. Dari hasil analisis, diperoleh lahan yang memiliki potensi pengembangan luasan sebesar 148.865,76 ha. Lahan yang memiliki potensi untuk pengembangan sawah tadah hujan di Kabupaten Pasaman Barat, yaitu dengan 114.536,64 ha atau 76,94% merupakan kelas sangat sesuai (S1) dan 34.329,12 ha atau 23,06% merupakan kelas cukup sesuai (S2). Namun dari hasil analisis neraca air pada lahan potensi pengembangan didapatkan nilai neraca air yang mengalami defisit akibat dari ketersediaan air dari curah efektif padi tidak mencukupi kebutuhan air tanaman selama pertumbuhan. Untuk memenuhi kekurangan kebutuhan air tersebut maka diperlukannya penjaminan air melalui irigasi. Analisys Land Support Power to Field Storage Receptacle In West PasamanAbstract. The addition land of development field is one of the way to maintenence food endurance in West Pasaman District can conducted by analyse land support power to identify potential land, it contains maps of potential field storage receptacle in West Sumatera district, that can give information about land suitability, distribute, and development land in West Pasaman district. This research was conducted by using scoring method and overlay using software ArcGIS 10 on March-April 2015 in West Pasaman District and Land and Water Resources Engineering Laboratory, Department of Agricultural Engineering, Faculty of Agricultural Technology, Andalas University. From the analysis, land potencial can be developed is 148.865,76 ha. 114.536,64 ha or 76,94%, development land in West Pasaman District is classifid to extremly suit class (S1) and 34.329,12 ha or 23.06% is classified to suit class (S2). Although, water balance analysis in potencial development land decrease, beacuse of the availability of water from effective rain can not cover the plant need as a growth period. This research is needed To fill the decrease of water by using irrigation.

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