Management Practices, Soil Quality and Maize Yield in Smallholder Farming Systems of Central Malawi


Book Description

"The effect of management practices used by smallholder farmers to improve soil quality and increase maize yield was examined in an 80 ha. micro-watershed of central Malawi. Because of the complexity inherent in smallholder farming systems, this research proposed the combination of participatory methods with analytical techniques developed in field ecology, such as multivariate and spatial analysis. During a Participatory Rural Appraisal (PRA), farmers identified factors potentially influencing soil quality and maize yield. One hundred and seventy-six (176) plots were located in twenty-nine (29) fields and characterized for management practices and biophysical characteristics. Soil samples were collected at each plot and analysed for a suite of properties. The maize yield was measured for both 1996--97 and 1997--98 seasons. A formal survey was used to gather information on household characteristics. Results showed that management practices that were promoted by a previous extension project, such as alley cropping and the planting of grass on contour ridges, were strongly correlated and found mainly in fields located closer to house compounds. Farmers with a higher proportion of their land under wetland gardens tended to use less agroforestry. Food security was associated with households that were able to purchase inorganic fertilizers, had larger landholding size, and owned livestock and woodlots. The effect of management practices on maize yield and soil quality was partially confounded with characteristics of the plot, such as slope, degradation level, number of years under cultivation or pest damage. Higher maize yield was observed in plots that were better managed, as expressed by the combination of different management practices, lower pest incidence, fewer erosion signs and higher soil fertility. Some positive effects of alley cropping on soil quality were observed in plots that were cultivated for a longer period and located on flatter land. This study demo" --




Advances in Integrated Soil Fertility Management in sub-Saharan Africa: Challenges and Opportunities


Book Description

Food insecurity is a fundamental challenge to human welfare and economic growth in Africa. Low agricultural production leads to low incomes, poor nutrition, vulnerability to risk and threat and lack of empowerment. This book offers a comprehensive synthesis of agricultural research and development experiences from sub-Saharan Africa. The text highlights practical lessons from the sub-Saharan Africa region.







Agricultural Policy and Soil Fertility Management in the Maize-based Smallholder Farming System in Malawi


Book Description

This study assesses the impact of agricultural policy on soil fertility management and productivity in the smallholder maize-based farming system in Malawi. The study applies econometric and farm household modeling to address three specific objectives: to characterize factors affecting farmers' choice and intensity of soil fertility management practices, to assess the productivity, profitability and technical efficiency implications of such practices, and to identify the most feasible options that maximize food security, i. e. household income, with lower soil fertility mining implications. The study recommends a soil fertility management policy based on complimentary strategies.




Soil Fertility Management for Sustainable Agriculture


Book Description

Sustainability of agricultural systems is a major global concern due to population growth and a number of environmental factors. This book addresses the key to the development of sustainable agriculture-management of soil fertility. Combining data from temperate and tropical regions, it presents a complete picture of how various soils can best be managed under widely different environmental conditions. Soil Fertility Management for Sustainable Agriculture is an excellent reference for environmental and agricultural professionals as well as a textbook for undergraduate and graduate students preparing for a career in agriculture or soil fertility management.




Multi-scale Sustainable Intensification of Small-holder Agriculture in Malawi


Book Description

Malawi's smallholder agricultural production is a maize-mixed system following the unimodal rainfall system, prone to climate shocks causing variable crop yields that increase food insecurity. Smallholder farmers make decisions on crop and farm management based on resource availability as well as socio-economic and environmental factors. The government of Malawi has made efforts to improve agricultural production through fertilizer subsidies and the promotion of sustainable farm practices such as legume intercropping and crop residue management practices for soil fertility enhancement. Such efforts are part of the Sustainable Intensification (SI) of Agriculture pathway widely supported across Africa as a means to increase food and agricultural production. The purpose of this research is to examine Malawi's agriculture through a multi-scale lens; national, sub-regional and local recognizing the spatial-temporal environmental and social drivers occurring across agro-ecologies and influencing smallholder farmers and their capacity for sustainable food production. We assess spatial patterns of Malawian productivity using decadal (2006-2017) climate, edaphic properties, and vegetation indexes, where spatially-located positive trends discrete from climate are presented as evidence of where Intensification (SI) of agriculture is taking place. Secondly, a baseline study that captures farmer demographics and farm practices from randomly stratified sites with varying agro-ecologies is carried out to better understand the contemporary Malawian farmer, the environment within which they produce food, and their overall potential for sustainable agriculture. Land Use Land Cover (LULC) change analyses and landscape quantification of agricultural intensification patterns and their underlying landscape processes are assessed for evidence of sustainable practices. Additionally, we elucidate the landscape patterns of the SI of agriculture associated with Malawi's agricultural extension delivery system. The main findings show evidence of positive spatial trends in Malawi's agricultural productivity that are not influenced by mesic climatic signals. This is consistent with evidence of farmer managed agricultural intensification. At the sub-regional scale, there are few land use changes in Central Malawi's Dedza and Ntcheu districts from 2014 to 2019 demonstrating the stability and maturity of this traditional agricultural landscape. However, overall land fragmentation has increased, particularly in land classified as agroforestry and shrubs/forests classes possibly indicating increased use of sustainable farming practices. Smallholders in central Malawi seek location specific agricultural advice on cropping systems and soil nutrient management recommendations. Effective delivery of advice by extension, responsive to farmer goals, could potentially boost farmer adoption of SI technologies.




Integrated Soil Fertility Management in Africa


Book Description

Forward. A call for integrated soil fertility management in Africa. Introduction. ISFM and the African farmer. Part I. The principles of ISFM: ISFM as a strategic goal, Fertilizer management within ISFM, Agro-minerals in ISFM, Organic resource management, ISFM, soil biota and soil health. Part II. ISFM practices: ISFM products and fields practices, ISFM practice in drylands, ISFM practice in savannas and woodlands, ISFM practice in the humid forest zone, Conservation Agriculture. Part III. The process of implementing ISFM: soil fertility diagnosis, soil fertility management advice, Dissemination of ISFM technologies, Designing an ISFM adoption project, ISFM at farm and landscape scales. Part IV. The social dimensions of ISFM: The role of ISFM in gender empowerment, ISFM and household nutrition, Capacity building in ISFM, ISFM in the policy arena, Marketing support for ISFM, Advancing ISFM in Africa. Appendices: Mineral nutrient contents of some common organic resources.




Tropical Soil Biology and Fertility


Book Description

In this handbook methods are given to determine soil characteristics, organic matter compounds, phosphorus in soil, nitrogen fixation, soil solution sampling, plant nutrient uptake and the nitrogen availability




Agricultural Policy and Soil Fertility Management in the Maize-based Smallholder Farming System in Malawi


Book Description

This study assesses the impact of agricultural policy on soil fertility management and productivity in the smallholder maize-based farming system in Malawi. The study applies econometric and farm household modeling to address three specific objectives: to characterize factors affecting farmers' choice and intensity of soil fertility management practices, to assess the productivity, profitability and technical efficiency implications of such practices, and to identify the most feasible options that maximize food security, i. e. household income, with lower soil fertility mining implications. The study recommends a soil fertility management policy based on complimentary strategies.




Farming Systems and Poverty


Book Description

A joint FAO and World Bank study which shows how the farming systems approach can be used to identify priorities for the reduction of hunger and poverty in the main farming systems of the six major developing regions of the world.