인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
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지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록·키워드
Poor soil health associated with crop production with little or no additions of organic or mineral nutrient resources is an underlying cause of low crop productivity and food insecurity in sub-Saharan Africa (SSA). There is need to support smallholder farmers to intensify crop production mainly by increasing the use of fertilizers and improved crop varieties, while managing organic resources to maintaining soil fertility. Efforts are also required to nutrient management recommendations to ensure that agronomic and economic efficiency is optimized for highly variable soil fertility conditions. We used the Nutrient Expert for Hybrid Maize (NE) decision support tool to explore the potential impact of various options for maize production intensification for various categories of farmers in Siaya, Western Kenya, and Wedza, Eastern Zimbabwe. Nutrient Expert (NE) applies the site-specific nutrient management concepts to develop strategies to manage fertilizer N, P, and K. Determination of N, P, and K nutrient requirements for a given field by NE is based on the relationship between the balanced uptake of nutrients at harvest and grain yield. The N, P, K fertilizer requirements are mainly based on the soil’s nutrient supply potential, and attainable yields depending on other soil constraints and water-limited yield. Farm types generated from past studies were used as a basis for development of farm-specific maize production intensification nutrient management strategies. At the two study sites, soil fertility conditions and current maize productivity was strongly related to farm resources endowment, with high resource endowment (HRE) category farmers having more fertile soils and achieving >3 t/ha compared to about 2 t/ha and 1 t/ha for medium resource endowment (MRE) and ... 전체 초록 보기
본문·목차
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