Differential response to tree fallows in rotational woodlot systems in semi-arid Tanzania: Post-fallow maize yield, nutrient uptake, and soil nutrients

Kimaro, Anthony A.; Timmer, V. R.; Chamshama, S.A.O.; Mugasha, A. G.; Kimaro, D.A.

doi:10.1016/j.agee.2007.11.007

Cited by 25 publications

(17 citation statements)

References 19 publications

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“…Generally, there seems to be a consensus that the soils in Tanzania and the neighboring countries are not very fertile. The relevance of soil organic carbon management and appropriate fallowing systems such as agroforestry have been pointed out since as critical for sustaining agricultural production (Kimaro et al, 2008;Nandwa, 2001). In the present study, the regional trend in soil fertility with respect to the soil mineralogical and chemical properties was investigated.…”

Section: Introductionmentioning

confidence: 96%

Soil Fertility Status and Its Determining Factors in Tanzania

Funakawa¹,

Yoshida²,

Watanabe³

et al. 2012

Soil Health and Land Use Management

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Section: Introductionmentioning

confidence: 96%

Soil Fertility Status and Its Determining Factors in Tanzania

Funakawa¹,

Yoshida²,

Watanabe³

et al. 2012

Soil Health and Land Use Management

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“…Simulations using the same conditions (real data for weather, soil, agronomic management) of the field experiments done by Kimaro et al (2008Kimaro et al ( , 2009) including a nearby region, were done. The results of the validation were satisfactory, indicating that the model could mimic maize grain yields from field observations of three available crop seasons (2004)(2005)(2006), as presented in …”

Section: Model and Cultivar Validationmentioning

confidence: 99%

“…However, for this study, a further validation step was done using three years of field data including soil, weather, agronomic management and yield (Kimaro et al 2008(Kimaro et al , 2009 (Fox 1981) and relative root mean squared error (RRMSE) (Jørgensen et al 1986) were used to evaluate the simulation outputs. The final maize plant population density was defined at 33000 plants per ha, planted at 7 cm depth in rows with 75 cm spacing between rows.…”

Section: Crop Modelingmentioning

confidence: 99%

Is dry soil planting an adaptation strategy for maize cultivation in semi-arid Tanzania?

et al. 2017

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Agriculture has the greatest potential to lift the African continent out of poverty and alleviate hunger. Among the countries in sub-Saharan Africa, Tanzania has an abundance of natural resources and major agricultural potential. However, one of the most important constraints facing Tanzania's agricultural sector is the dependence on unreliable and irregular weather, including rainfall. A strategy to cope with climate uncertainty in semi-arid regions is to proceed with the sowing of the crop before the onset of the rainy season. The advantage is that when the rains start, seeds are already in the soil and can begin immediately the process of germination. The objective of this paper was to assess the effectiveness of dry-soil planting for maize as an adaptation strategy in the context of a changing climate in Dodoma, a semi-arid region in Tanzania. For this assessment, the DSSAT crop model was used in combination with climate scenarios based on representative concentration pathways. A probability of crop failure of more than 80% can be expected when sowing occurs during the planting window (of 21 days) starting on 1st November. The next planting window we assessed, starting on 23rd November (which was still before the onset of rain), presented significantly lower probabilities of crop failure, indicating that sowing before the onset of the rainy season is a suitable adaptation strategy. Results also indicated that, despite not reaching the highest maize grain yields, fields prepared for dry-soil planting still produced adequate yields. The cultivation of several fields using the dry planting method is a strategy farmers can use to cope with low rainfall conditions, since it increases the chances of harvesting at least some of the cultivated fields. We conclude that dry-soil planting is a feasible and valid technique, even in scenarios of climate change, in order to provide acceptable maize yields in semi-arid Tanzania.

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“…Essas plantas também promovem o acúmulo de quantidades substanciais de carbono (C), que pode favorecer melhorias nas propriedades físicas e químicas do solo, aprimoramento das atividades biológicas e aumento da disponibilidade de nutrientes (Macedo et al, 2008;Cayuela et al, 2009). Diante das dificuldades de manejo do consórcio em pastagens tropicais entre gramíneas e leguminosas herbáceas existe também a possibilidade de uso de espécies arbustivo-arbóreas, em um sistema silvipastoril (Dias et al, 2007;Barcellos et al, 2008), em particular em solos de baixa fertilidade do que naqueles de fertilidade mediana a alta, principalmente na área próxima às árvores (Pandey, 2007;Kimaro et al, 2008). Nascimento et al (2003), avaliando o efeito de 12 espécies leguminosas na composição química de um solo degradado, concluíram que houve redução na acidez do solo e elevação dos teores de K e Mg, na profundidade de 0-10 cm.…”

Section: Introductionunclassified

Estoque de serapilheira e fertilidade do solo em pastagem degradada de Brachiaria decumbens após implantação de leguminosas arbustivas e arbóreas forrageiras

Silva

Lira

Júnior

et al. 2013

Rev. Bras. Ciênc. Solo

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RESUMOAs pastagens formam a base da pecuária brasileira; essas sofrem degradação em larga escala por deficiência de nitrogênio (N). O consórcio com leguminosas, além de fixar N, pode apresentar outros efeitos na fertilidade do solo como acidificação ou retirada de nutrientes de camadas mais profundas para as mais superficiais. Este trabalho objetivou avaliar o estoque de serapilheira e a fertilidade do solo em pastagens degradadas de braquiária (Brachiaria decumbens), após implantar leguminosas arbustivas e arbóreas forrageiras. Para isso, uma amostragem foi realizada em março de 2010 em um experimento no campo, introduzindo pastagem degradada de Brachiaria decumbens, em julho de 2008, com sabiá (Mimosa caesalpiniifolia), leucena (Leucaena leucocephala), mororó (Bauhinia cheilantha) e gliricídia (Gliricidia sepium), além de braquiária adubada e não adubada com N. As amostras de solo e serapilheira foram coletadas aos 0-10, 10-20 e 20-40 cm de profundidade, em três transectos, alternando pontos cobertos por gramíneas e leguminosas, totalizando sete amostras compostas por parcela para determinar pH, P, K, Ca, Mg e Al no solo, enquanto SB, t e m foram calculados. A serapilheira foi separada visualmente em leguminosas, gramíneas e materiais não identificados, em que foram utilizados para quantificação de matéria seca, matéria orgânica, N, P, C, fibra detergente ácido e lignina. A introdução das leguminosas aumentou os teores de N total na serapilheira e reduziu as relações C:N, com destaque para gliricídia e sabiá; entretanto, essa última apresentou

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Differential response to tree fallows in rotational woodlot systems in semi-arid Tanzania: Post-fallow maize yield, nutrient uptake, and soil nutrients

Cited by 25 publications

References 19 publications

Soil Fertility Status and Its Determining Factors in Tanzania

Soil Fertility Status and Its Determining Factors in Tanzania

Is dry soil planting an adaptation strategy for maize cultivation in semi-arid Tanzania?

Estoque de serapilheira e fertilidade do solo em pastagem degradada de Brachiaria decumbens após implantação de leguminosas arbustivas e arbóreas forrageiras

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