publications

Research with Impact

The Research with Impact series highlights case study examples of solution-driven research supported by IPNI.

 

Strengthening Families in Peru by Improving Coffee Yields

Small holder coffee farmers who have migrated to the steep slopes of the northeastern Amazon in Peru commonly faced a repeating poverty cycle. Their perennially low yields and incomes prevent adequate reinvestment in their crops. Over time this situation has lead to extreme poverty and family instability. Soil nutrient depletion is a main factor limiting yields. Very little fertilizer is used, biomass production is low, and the risk of soil erosion is high. Eventually families move on in search of new land to start the cycle again.

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Boosting Soybean Yields and Raising Farmer Income in Kenya with Nutrient Management

Grain legumes are an important source of dietary protein and income for farmers in many parts of sub-Saharan Africa. Soybean production provides smallholder farmers in Kenya and Uganda with an alternative cash income, improves nutritional security and contributes to the soil N supply through biological N2 fixation. Smallholder farmers currently apply little or no fertilizer on soybean and prefer to use it on other crops instead, which has contributed to poor soybean yields.

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Overcoming Low Maize Yields with Lime and Potassium in Chiapas, Mexico

Soil acidity is a major constraint that limits maize productivity in the southern agricultural region of Chiapas, Mexico. The region’s dominant sandy soils are derived from granite in a lowland tropical environment. These soils are naturally acidic, but conditions are made worse by burning plant residues, use of acidifying fertilizers, and tillage.

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Improving Yield and Profitability of Processing Tomatoes in Northwest China with Potassium

Tomatoes require a relatively large amount of potassium (K) for adequate growth. Recently, scientists have detected declining K concentrations for soils in the Xinjiang region, and this is thought to be related to the amount of K removed from the field during the continual harvest of processing tomatoes as well as other crops. Falling soil K fertility is leading to a reduction in tomato yield and quality.

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