Sieglinde S Snapp
Biographic Data
| ID | 231771 |
|---|---|
| NAME | Sieglinde S Snapp |
| GIVEN NAMES | Sieglinde S |
| FAMILY NAME | Snapp |
| SIGNATURE | SNAPP S S |
| AFFILIATIONS | Michigan State University |
| ORCID | 0000-0002-9738-0649 |
| VERIFIED | Yes |
| TOTAL WORKS | 21 |
| TOTAL CITATIONS | 58 |
| AUTHOR COUNT | 21 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2003 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 4 |
The impact of site-specific soil-test-based extension advice on farm management in Malawi
Rotational complexity increases cropping system output under poorer growing conditions
Growing multiple crops in rotation can increase the sustainability of agricultural systems and reduce risks from increasingly adverse weather. However, widespread adoption of diverse rotations is limited by economic uncertainty, lack of incentives, and limited information about long-term outcomes. Here, we combined 36,000 yield observations from 20 North American long-term cropping experiments (434 site-years) to assess how greater crop diversity…
Realizing soil health for food security in Africa
Strategies Steering Intensification Pathways of Farmers in Central Malawi
Smallholder farmers face many challenges to improve their livelihoods and food security. Intensification of agricultural production can help to achieve these goals. Yet farmers are highly heterogenous in their strategies towards intensification, potentially following unsustainable intensification pathways. Using Q Methodology, we ascertain different strategies regarding farm improvement and intensification of smallholder farmers in the Dedza and …
Against the odds
Spatially differentiated nitrogen supply is key in a global food–fertilizer price crisis
A regional geopolitical conflict and sudden massive supply disruptions have revealed vulnerabilities in our global fuel–fertilizer–food nexus. As nitrogen (N) fertilizer price spikes threaten food security, differentiated responses are required to maintain staple cereal yields across over- and underfertilized agricultural systems. Through integrated management of organic and inorganic N sources in high- to low-input cereal production systems, we …
Research priorities for global food security under extreme events
Extreme events, such as those caused by climate change, economic or geopolitical shocks, and pest or disease epidemics, threaten global food security. The complexity of causation, as well as the myriad ways that an event, or a sequence of events, creates cascading and systemic impacts, poses significant challenges to food systems research and policy alike. To identify priority food security risks and research opportunities, we asked experts from …
The relationship between farmer demographics, social identity and tillage behavior
The role of active soil carbon in influencing the profitability of fertilizer use
We use recent plot‐level panel data from Tanzanian smallholder farmers to investigate maize yield responses to inorganic fertilizer under variable soil carbon conditions. Unlike many prior studies which consider total carbon measurements, we focus on active soil carbon, which is a component strongly related to key soil functions, such as nutrient cycling and availability. Active soil carbon is found to be a strong predictor of maize yield respons…
Nitrogen efficiency by soil quality and management regimes on Malawi farms
Maize is the primary economic and dietary staple crop for most poor farmers in Southern Africa, yet low yields have persisted in the region for decades. Intensifying maize production in a sustainable way using the same land will be increasingly important as virgin land becomes scarcer and fallowing becomes less common. This study investigates the sustainability of intensification underway in the African smallholder sector using a uniquely detaile…
Documentation of farmer perceptions and site‐specific properties to improve soil management on smallholder farms in Tanzania
Identifying sustainable land management practices within smallholder agriculture is a challenge. This is partly driven by the challenge of documenting farmers' perspectives and practices in an integrated manner with site‐specific scientific soil assessment. Smartphone applications such as LandPKS provide new approaches to quantify site‐specific soil degradation and fertility but are untested with African farm management. We surveyed 578 household…
Digital soil mapping of nitrogen, phosphorus, potassium, organic carbon and their crop response thresholds in smallholder managed escarpments of Malawi
Sifting through the weeds
Farming for change
The role of community-based livestock management institutions in the adoption and scaling up of pigeon peas in Malawi
A Multiscalar Approach to Mapping Marginal Agricultural Land
Marginal agricultural lands are defined here by suboptimal biophysical conditions and historically variable or low agricultural production. We characterize these areas using remotely sensed information to disentangle the biophysical and possible social factors driving marginality. Considering both the modifiable areal unit problem and the ecological fallacy problem, the heuristic we propose is generalizable across geographies and scales and provi…
Estimating demand for perennial pigeon pea in Malawi using choice experiments
Sustainable Intensification and Farmer Preferences for Crop System Attributes
What is sustainable intensification? Views from experts
Could farmer interest in a diversity of seed attributes explain adoption plateaus for modern maize varieties in Malawi
Realigning research and extension to focus on farmers’ constraints and opportunities
Sustainable Intensification and Farmer Preferences for Crop System Attributes
What is sustainable intensification? Views from experts
Estimating demand for perennial pigeon pea in Malawi using choice experiments
Could farmer interest in a diversity of seed attributes explain adoption plateaus for modern maize varieties in Malawi
Nitrogen efficiency by soil quality and management regimes on Malawi farms
Maize is the primary economic and dietary staple crop for most poor farmers in Southern Africa, yet low yields have persisted in the region for decades. Intensifying maize production in a sustainable way using the same land will be increasingly important as virgin land becomes scarcer and fallowing becomes less common. This study investigates the sustainability of intensification underway in the African smallholder sector using a uniquely detaile…
Farming for change
Realigning research and extension to focus on farmers’ constraints and opportunities
The relationship between farmer demographics, social identity and tillage behavior
Spatially differentiated nitrogen supply is key in a global food–fertilizer price crisis
A regional geopolitical conflict and sudden massive supply disruptions have revealed vulnerabilities in our global fuel–fertilizer–food nexus. As nitrogen (N) fertilizer price spikes threaten food security, differentiated responses are required to maintain staple cereal yields across over- and underfertilized agricultural systems. Through integrated management of organic and inorganic N sources in high- to low-input cereal production systems, we …
The role of community-based livestock management institutions in the adoption and scaling up of pigeon peas in Malawi
The impact of site-specific soil-test-based extension advice on farm management in Malawi
Realigning research and extension to focus on farmers’ constraints and opportunities
Could farmer interest in a diversity of seed attributes explain adoption plateaus for modern maize varieties in Malawi
What is sustainable intensification? Views from experts
Estimating demand for perennial pigeon pea in Malawi using choice experiments
Sustainable Intensification and Farmer Preferences for Crop System Attributes
The role of community-based livestock management institutions in the adoption and scaling up of pigeon peas in Malawi
A Multiscalar Approach to Mapping Marginal Agricultural Land
Marginal agricultural lands are defined here by suboptimal biophysical conditions and historically variable or low agricultural production. We characterize these areas using remotely sensed information to disentangle the biophysical and possible social factors driving marginality. Considering both the modifiable areal unit problem and the ecological fallacy problem, the heuristic we propose is generalizable across geographies and scales and provi…
Farming for change
Documentation of farmer perceptions and site‐specific properties to improve soil management on smallholder farms in Tanzania
Identifying sustainable land management practices within smallholder agriculture is a challenge. This is partly driven by the challenge of documenting farmers' perspectives and practices in an integrated manner with site‐specific scientific soil assessment. Smartphone applications such as LandPKS provide new approaches to quantify site‐specific soil degradation and fertility but are untested with African farm management. We surveyed 578 household…
Digital soil mapping of nitrogen, phosphorus, potassium, organic carbon and their crop response thresholds in smallholder managed escarpments of Malawi
Sifting through the weeds
The role of active soil carbon in influencing the profitability of fertilizer use
We use recent plot‐level panel data from Tanzanian smallholder farmers to investigate maize yield responses to inorganic fertilizer under variable soil carbon conditions. Unlike many prior studies which consider total carbon measurements, we focus on active soil carbon, which is a component strongly related to key soil functions, such as nutrient cycling and availability. Active soil carbon is found to be a strong predictor of maize yield respons…
Nitrogen efficiency by soil quality and management regimes on Malawi farms
Maize is the primary economic and dietary staple crop for most poor farmers in Southern Africa, yet low yields have persisted in the region for decades. Intensifying maize production in a sustainable way using the same land will be increasingly important as virgin land becomes scarcer and fallowing becomes less common. This study investigates the sustainability of intensification underway in the African smallholder sector using a uniquely detaile…
Research priorities for global food security under extreme events
Extreme events, such as those caused by climate change, economic or geopolitical shocks, and pest or disease epidemics, threaten global food security. The complexity of causation, as well as the myriad ways that an event, or a sequence of events, creates cascading and systemic impacts, poses significant challenges to food systems research and policy alike. To identify priority food security risks and research opportunities, we asked experts from …
The relationship between farmer demographics, social identity and tillage behavior
Strategies Steering Intensification Pathways of Farmers in Central Malawi
Smallholder farmers face many challenges to improve their livelihoods and food security. Intensification of agricultural production can help to achieve these goals. Yet farmers are highly heterogenous in their strategies towards intensification, potentially following unsustainable intensification pathways. Using Q Methodology, we ascertain different strategies regarding farm improvement and intensification of smallholder farmers in the Dedza and …
Against the odds
Spatially differentiated nitrogen supply is key in a global food–fertilizer price crisis
A regional geopolitical conflict and sudden massive supply disruptions have revealed vulnerabilities in our global fuel–fertilizer–food nexus. As nitrogen (N) fertilizer price spikes threaten food security, differentiated responses are required to maintain staple cereal yields across over- and underfertilized agricultural systems. Through integrated management of organic and inorganic N sources in high- to low-input cereal production systems, we …
Rotational complexity increases cropping system output under poorer growing conditions
Growing multiple crops in rotation can increase the sustainability of agricultural systems and reduce risks from increasingly adverse weather. However, widespread adoption of diverse rotations is limited by economic uncertainty, lack of incentives, and limited information about long-term outcomes. Here, we combined 36,000 yield observations from 20 North American long-term cropping experiments (434 site-years) to assess how greater crop diversity…
Realizing soil health for food security in Africa
The impact of site-specific soil-test-based extension advice on farm management in Malawi
Economics (18 works) · Agricultural Innovations and Practices (16 works) · Agriculture (15 works) · Geography (15 works) · Biology (10 works) · Business (10 works) · Ecology (10 works) · Agricultural economics (9 works) · Agroforestry (9 works) · Agronomy (9 works)