Desire for Greener Land

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Ecological production of almonds and olives using green manure Spain - Agricultura ecológica de almendros y olivos con abono verde (Spanish) Ecological production of almonds and olives under dryland conditions using green manure to increase soil fertility, to protect against soil erosion and to obtain a high-value product. Ecological agriculture is a strictly controlled production system that does not use synthetic chemical products like fertilizers, insecticides or pesticides. Also genetically modified organisms and materials are not used. Green manure or low quantities of organic fertilizers, preferably from dung (sheep, goat, cow, chicken), are used to increase and maintain soil fertility. Green manure is provided by seeding a mixture of leguminous nitrogen-fixing species and cereals in autumn (October) and incorporating this into the soil with tillage in springtime (May). To optimize the fertilizer effect, there is still scientific discussion on the need for mowing the green manure and letting it dry for several days before it is ploughed into the soil. For this system, no ploughing is performed in winter, which reduces fuel use and emission of greenhouse gases. In addition to its fertilising effect, green manure provides a continuous surface cover during winter time protecting the soil from erosion. The products grown under this ecological system command a higher market price than those grown under conventional production schemes. The aim of ecological agriculture is to protect biodiversity and the environment and maintain or improve soil fertility and reduce soil, water, and air pollution. Under ecological agriculture and by using green manure, soil cover, soil organic matter, and soil biological activity will increase, which positively affects soil structure, soil fertility and soil water infiltration capacity. This reduces the sensitivity of the soil to surface crusting and it reduces surface runoff and soil erosion by up to 60%. Workload and energy use are up to 50% lower than under conventional agriculture, and benefits may increase around 40% due to higher yields. Moreover, a higher market price of ecologically produced almonds and olives will lead to increased farm income. This better economic return discourages land abandonment of marginal lands with low productivities under conventional farming. Ecological almonds and olives production does not require special establishment activities or investments in specialized equipment. Infestations by, for example, insects and caterpillars are treated twice yearly by degradable products based on copper salts (Oxicloruro, max 3‰ solution) and mineral oils in winter, or the spores and proteins produced by the bacteria Bacillus thuringiensis or based on natural pyrethrins (from the Chrysanthemum cinerariaefolium; max 1.5 l/ha) in springtime. In ecological agriculture, farmers are obliged to take advice and instructions regarding plague control and fertilizer use from technicians specialized in ecological agriculture. Soils mostly have a shallow to medium depth (between 20-60 cm), and slopes are gentle to moderate (between 5 and 15%). The climate is semi-arid with a mean annual rainfall around 300 mm. Droughts, in summer, commonly last for more than 4-5 months. Annual potential evapotranspiration rates larger than 1000 mm are common. The production system is highly mechanised and market-oriented but depends strongly on agricultural subsidies. All cropland is privately owned. SLM Technology: Ecological production of almonds and olives using green manure, Spain DESIRE – WOCAT 2012 Above left: ecological almond plantation with a dense understorey of leguminous and cereal species in spring (Photo: Joris de Vente) Above right: detailed view of flowering green manure (Vicia sativa and barley) in early spring (Photo: Joris de Vente) Region: Murcia, Guadalentín catchment Technology area: 10 - 100 km 2 Conservation measure: agronomic Stage of intervention: prevention of land degradation, mitigation / reduction of land degradation Origin: externally - recent (
Classification Land use problems: There is a lack of water for irrigation of crops limiting the crop types that can be planted as well as the crop yield of dryland farming. A lack of water availability seriously limits the production potential of the soil and results in a low vegetation/crop cover. The relatively high soil erosion rates cause various off-site related problems (i.e. flooding, reservoir siltation) and on-site problems (i.e. gully formation and reduced soil depth). Land use Climate Degradation Conservation measure tree and shrub cropping (rainfed) Soil depth (cm) 0-20 20-50 50-80 80-120 >120 agroforestry semi-arid, subtropics Stage of intervention Origin Prevention Mitigation / Reduction Rehabilitation soil erosion by water: offsite degradation effects water degradation: decline of groundwater quality Land user's initiative: 10-50 years Experiments / research: 10-50 years Externally introduced: < 10 years ago Growing season(s): 220 days (Nov - Jun) Soil texture: medium (loam) Soil fertility: low Topsoil organic matter: low ( 4000 3000-4000 2000-3000 1500-2000 1000-1500 750-1000 500-750 250-500 < 250 agronomic: green manure Level of technical knowledge Agricultural advisor Land user Secondary technical functions: - increase in organic matter - increase of infiltration - increase / maintain water stored in soil - improvement of water quality, buffering/filtering water Altitude (m a.s.l.) Landform Slope (%) > 4000 3000-4000 2500-3000 2000-2500 1500-2000 1000-1500 500-1000 100-500
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Desire for Greener Land Options for
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DESIRE - WOCAT Desire for Greener L
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Co-published by University of Bern,
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Cross-slope barriers Progressive be
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The present DESIRE publication desc
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Contributing authors and DESIRE con
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Desire for Greener Land - Options f
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XIV DESIRE - WOCAT Desire for Green
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Figure 1: Desertification vulnerabi
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In DESIRE, WOCAT methods and tools
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Part 1
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8 DESIRE - WOCAT Desire for Greener
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Figure 1: Methodological framework
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to Russia and China (see Table 1).
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DRI = 5.4 Very high desertification
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Table 2 provides a more detailed de
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decision. This leads to solutions b
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Aims and objectives This penultimat
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Figure 7: The DESIRE Project has fo
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References: n EEA-European Environm
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Area (x1000 Ha) Major land use type
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Major land degradation types per st
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Rate of degradation per study site
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Production services were affected o
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% of area under conservation measur
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Figure 16: Effectiveness of conserv
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Conservation impact on ecosystem se
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Analysis of SLM technologies Introd
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Table 2: WOCAT categories of SLM me
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Origin of technology SLM technologi
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Table 3: Sensitivity of and toleran
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No. of case studies Land Ownership
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Assessment Impacts of the Technolog
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Classification Land use problems: L
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Class sification Land use problemss
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Classification Land use problems: D
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Class sification Land use problemss
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Classification Land use problems: T
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Classification Land use problems: O
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Problem, objectives and constraints
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Impacts of the Approach Improved su
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Input: - Equipment (machinery, tool
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Problems, objectives, and constrain
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Desire for Greener Land Opopejo Qui
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2.2 Mapping case studies This secti
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Land recommendation Land conservati
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Portugal - Maçao The Maçao area h
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Italy - Rendina The Rendina area ex
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Greece - Nestos This area has chemi
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Turkey - Eskişehir The Eskeheşir
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Tunisia - Koutine The Koutine area
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Russia - Novy Land use in the Novy
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Botswana - Boteti The main land use
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Chile - Cauquenes The Cauquenes are
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Status of land degradation, sustain
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Examples of potential SLM technolog
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IV Up-scaling SLM strategies Actual
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Case study of the DESIRE methodolog
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II Identifying, evaluating and sele
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The results showed that the best op
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IV Up-scaling SLM strategies Some r
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Explanation pages of case studies:
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Cropland (or grazing land, mixed la
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Explanation pages of case studies:
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Here appears an organogram - if ava
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Pictograms SLM technology Land use
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Logos of partners 282 DESIRE - WOCA
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Desire for Greener Land

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