1.2 Detalhes do contato das pessoas capacitadas e instituições envolvidas na avaliação e documentação da tecnologia

Nome do projeto que facilitou a documentação/avaliação da Tecnologia (se relevante)

Book project: where the land is greener - Case Studies and Analysis of Soil and Water Conservation Initiatives Worldwide (where the land is greener)

Nome do projeto que facilitou a documentação/avaliação da Tecnologia (se relevante)

Sustainable Land Management Practices of South Africa (SLM South Africa)

1.3 Condições em relação ao uso da informação documentada através de WOCAT

O/a compilador/a e a(s) pessoa(s) capacitada(s) aceitam as condições relativas ao uso de dados documentados através da WOCAT:

Sim

1.4 Declaração de sustentabilidade da tecnologia descrita

A tecnologia descrita aqui é problemática em relação a degradação da terra de forma que não pode ser declarada uma tecnologia de gestão sustentável de terra?

Não

2.1 Descrição curta da tecnologia

Definição da tecnologia:

Eradication of invasive species and revegetation of degraded rangelands by different treatments, including oversowing with grass seed mixture, supplementing with lime, cattle dung, and "brush packing" (laid out branches).

2.2 Descrição detalhada da tecnologia

Descrição:

A research investigation was undertaken in an area of degraded communal rangeland, which had been invaded by an alien tree species (Acacia mearnsii – black wattle). Competition from the water-demanding A. mearnsii, combined with overgrazing, had resulted in an almost total absence of palatable grasses. All that was left were a few patches of star grass (or ‘bermuda grass’: Cynodon dactylon). Prior to the research, discussions were held between personnel of the ‘Working for Water’ programme of the South African government and community members.
The purpose of the trials was to determine how best to eradicate the invasive trees and revegetate the rangeland. The restoration area was not fenced off and was thus open to grazing. The trials comprised five treatments, with three replicates each, on plots of 10 m by 20 m. In all treatments the A. mearnsii was eradicated manually, and chemical biocide applied to the stumps to prevent regrowth. Lime and grass seed (of palatable species) were applied to the loosened surface and covered with soil. The five treatments were:
(A) oversowing with grass seed mixture, supplementing of dolomitic lime, cattle dung, and ‘brush packing’ (see below for explanation of term);
(B) oversowing with grass seed mixture and supplementing with cattle dung;
(C) oversowing with grass seed mixture and supplementing with dolomitic lime;
(D) oversowing with grass seed mixture and brush packing;
(E) oversowing with grass seed mixture only.
In addition stone lines were laid out along the contour, between plots. The ‘brush packing’, referred to in treatments A and D comprised branches laid out in strips across the slope to retard runoff, trap soil, improve the micro-climate for establishing grass seedlings and protect the young plants from browsing by animals. The results showed treatment A to be the most effective in restoring the productive and protective function of the rangeland. From the trials, the estimated costs of applying the best technology would be US$ 230 per hectare. The key constraints for successful adoption however are not just technical, but include: (1) the need to protect the area from grazing and trampling by animals during the establishment period; (2) stopping removal of brushwood for firewood; and (3) the need for community agreement on initial protection and subsequent sustainable utilisation of the restored range.

Establishment activities:
1.Manual eradication of trees with chain saw and axe
2.Application of chemical biocide to the stumps to prevent any regrowth
3.Ripping of soil surface to a depth of 5 cm using a three tined hand implement
4.Application of dolomitic lime and raking it into soil after ripping of the soil
5.Application of organic material (cattle dung) after ripping and lime application
6.Oversowing with grass seed mixture after ripping of the soil and application of lime and organic material
7.Brush packing against contour and packing of rock contours against the slope All the branches and stones were collected from the restoration area. Rock contours were packed against (perpendicular) to the slope in the study area at varying intervals (approximately 10-15 m apart) in order to retard runoff water, trap soil, and improve conditions for seed germination (see inserted drawing below and attachment). Branches were packed (brush packing) along the slope in certain treatments within the study site in order to trap soil, retard runoff water en serve as a micro-climate for germinating and establishing grass seedlings
Total duration of restoration took 3 years, from removal of trees till revegetation trials were laid out and technology was established.

Maintenance / recurrent activities per year:
Following initial establishment maintenance was limited to 2 follow up applications of herbicide (after 3 and 5 months). Maintenance of contours was not done after restoration.

2.3 Fotos da tecnologia

2.5 País/região/locais onde a tecnologia foi aplicada e que estão cobertos nesta avaliação

2.6 Data da implementação

Caso o ano exato seja desconhecido, indique a data aproximada:

• menos de 10 anos atrás (recentemente)

2.7 Introdução da tecnologia

Especifique como a tecnologia foi introduzida:

• durante experiências/ pesquisa

Comentários (tipos de projeto, etc.):

It originated from the overall need to restore degraded rangelands.

3.1 Principal/principais finalidade(s) da tecnologia

• Reduz, previne, recupera a degradação do solo

3.2 Tipo(s) atualizado(s) de uso da terra onde a tecnologia foi aplicada

Comentários:

Major land use problems (compiler’s opinion): Occurrence of bare areas after control of alien invasive.
Major land use problems (land users’ perception): Minimal grazing for cattle, due to the occurrence of bare areas.
Grazingland comments: No area closure, thus livestock graze freely on statelands and thus causes overgrazing over a large area.
This is a constraint to management in grazing lands. No rotational grazing. No area closure, thus livestock graze freely on statelands and thus causes overgrazing over a large area.

Number of growing seasons per year: 1
Longest growing period in days: 210, Longest growing period from month to month: Oct - April

3.4 Abastecimento de água

Abastecimento de água para a terra na qual a tecnologia é aplicada:

• Precipitação natural

3.5 Grupo de GST ao qual pertence a tecnologia

• Gestão de pastoralismo e pastagem

3.6 Medidas de GST contendo a tecnologia

Comentários:

Specification of other agronomic measures: manuring, lime, 'brush packing' (trash lines)
Specification of other vegetative measures: oversowing grass seed mixture
Specification of other structural measures: stone lines
Type of vegetative measures: in blocks

3.7 Principais tipos de degradação da terra abordados pela tecnologia

Comentários:

Main causes of degradation: deforestation / removal of natural vegetation (incl. forest fires) (Alien invasives.), over-exploitation of vegetation for domestic use (Trampling.), overgrazing (Cattle and goat.)
Secondary causes of degradation: poverty / wealth (Lack of captial - To pay labours to apply technologies.), labour availability (Lack of labour - To remove alien species.)

3.8 Redução, prevenção ou recuperação da degradação do solo

Especifique o objetivo da tecnologia em relação a degradação da terra:

• Reduzir a degradação do solo
• Recuperar/reabilitar solo severamente degradado

4.1 Desenho técnico da tecnologia

4.2 Informação geral em relação ao cálculo de entradas e custos

Outro/moeda nacional (especifique):

Rand

Se for relevante, indique a taxa de câmbio do USD para moeda local (por exemplo, 1 USD = 79,9 Real): 1 USD =:

8,2

4.3 Atividades de implantação

	Atividade	Periodicidade (estação do ano)
1.	Eradication of trees, Follow-up with herbicide	beginning of project
2.	Loosening of soil, Lime application	6 months
3.	Application of organic material	6 months
4.	Oversowing with grass seed mixture	6 months
5.	Brush packing	6 months

4.4 Custos e entradas necessárias para a implantação

	Especifique a entrada	Unidade	Quantidade	Custos por unidade	Custos totais por entrada	% dos custos arcados pelos usuários da terra
Mão-de-obra	labour	ha	1,0	35,0	35,0
Equipamento	machine use	ha	1,0	65,0	65,0
Equipamento	tools	ha	1,0	5,0	5,0
Material vegetal	seeds	ha	1,0	70,0	70,0
Fertilizantes e biocidas	fertilizer	ha	1,0	25,0	25,0
Fertilizantes e biocidas	biocides	ha	1,0	30,0	30,0
Custos totais para a implantação da tecnologia					230,0
Custos totais para o estabelecimento da Tecnologia em USD					28,05

Comentários:

Duration of establishment phase: 35 month(s)

4.5 Atividades recorrentes/manutenção

	Atividade	Periodicidade/frequência
1.	2 Follow-ups with herbicide	after 3 & 5 months after application of technology /twice (at 3 and 5 months )

4.6 Custos e entradas necessárias pata a manutenção/atividades recorrentes (por ano)

	Especifique a entrada	Unidade	Quantidade	Custos por unidade	Custos totais por entrada	% dos custos arcados pelos usuários da terra
Mão-de-obra	labour	ha	1,0	7,0	7,0
Equipamento	tools	ha	1,0	5,0	5,0
Fertilizantes e biocidas	biocides	ha	1,0	20,0	20,0
Custos totais para a manutenção da tecnologia					32,0
Custos totais de manutenção da Tecnologia em USD					3,9

Comentários:

Eradication, seed purchasing, materials.

4.7 Fatores mais importantes que afetam os custos

Descreva os fatores mais determinantes que afetam os custos:

Biocides, fertilisers (lime), seeds and labour have a great effect on costs.

5.1 Clima

5.2 Topografia

5.3 Solos

5.6 Características dos usuários da terra que utilizam a tecnologia

Indique outras características relevantes dos usuários da terra:

Population density: 10-50 persons/km2
Annual population growth: 3% - 4%
80% of the land users are very rich (informal settlers and own 60% of the land (government).
20% of the land users are average wealthy and own 40% of the land (farmers).
Off-farm income specification: Informal settlers work in the city/mine, also mostly live of old age pension funds. Farmers (low percentage) have an income on-farm by means of selling cattle, crops and dairy products.

5.7 Área média de terrenos utilizados pelos usuários de terrenos que aplicam a Tecnologia

5.8 Propriedade de terra, direitos de uso da terra e de uso da água

Propriedade da terra:

• Estado

• provincial government

• provincial government

6.1 Impactos no local mostrados pela tecnologia

Impactos socioeconômicos

Produção

Renda e custos

Impactos socioculturais

Impactos ecológicos

Ciclo hídrico/escoamento

Solo

Clima e redução de riscos de desastre

6.2 Impactos externos mostrados pela tecnologia

6.4 Análise do custo-benefício

Como os benefícios se comparam aos custos de implantação (do ponto de vista dos usuários da terra)?

Como os benefícios se comparam aos custos recorrentes/de manutenção(do ponto de vista dos usuários da terra)?

6.5 Adoção da tecnologia

Comentários:

10 land user families have adopted the Technology with external material support
1 land user families have adopted the Technology without any external material support
There is a little trend towards spontaneous adoption of the Technology

6.7 Pontos fortes/vantagens/oportunidades da tecnologia

Pontos fortes/vantagens/oportunidades na visão do usuário da terra
Gazing improvement.

Pontos fortes/vantagens/oportunidades na visão do/a compilador/a ou de outra pessoa capacitada
Improvement of grazing resources.
Improved soil moisture availability by removing an alien species with a high water demand.
Reduced erosion by controlling runoff.

6.8 Pontos fracos, desvantagens/riscos da tecnologia e formas de superá-los

Pontos fracos/vantagens/riscos na visão do/a compilador/a ou de outra pessoa capacitada	Como eles podem ser superados?
The question of controlling ‘open access’ grazing by the community is the key to long-term success of rehabilitation	It is incumbent on the local municipal council to negotiate with communities regarding grazing control and community-based natural resource management more generally.
Removal of brushwood for firewood by community members and other aspects of long-term maintenance	See above: perhaps also seeking funds to pay labourers and buy biocides
Too many cattle and goats.	Reduce numbers to match grazing resources available
Insufficient aftercare.	Secure additional funds to pay labourers and buy biocides.

7.1 Métodos/fontes de informação

7.2 Referências às publicações disponíveis

Título, autor, ano, ISBN:

Soil classification: A taxonomic system for South Africa.. 1991.

Disponível de onde? Custos?

ARC -Institute for Soil, Climate and Water, Pretoria. 012 - 3102500.

Título, autor, ano, ISBN:

Harris J.A., Birch P., Palmer J.P. Land restoration and reclamation.. 1996.

Título, autor, ano, ISBN:

Kent M, Coker P. Vegetation description and analysis.. 1997.

Título, autor, ano, ISBN:

Tainton N. Veld management in South Africa.. 1999.

Título, autor, ano, ISBN:

Acocks. Veld types of South Africa.. 1988.

Título, autor, ano, ISBN:

HARRIS, J. A., BIRCH, P. AND PALMER, J. P. Land restoration and reclamation – Principles and Practices. Addison Wesley Longman, England. 230 p.. 1996.