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Growth and N uptake in pot-grown maize, beans, and cassava were evaluated under 2 levels of soil N at CIAT-Palmira (Colombia). The lower amount of the element reduced its uptake by the 3 species, resulting in lower tissue concn., especially in the leaves. Under low N, DM accumulation was also red...


Porto, M.C.M.El-Sharkawy, Mabrouk A.Cock, James H.Hernández, A. del P.Cadena, G. de[Crescimento, fotossintese e eficiencia do uso de nitrogenio em milho, feijao e mandioca submetidos a dois niveis de N no solo]Crescimento, fotossintese e eficiencia do uso de nitrogenio em milho, feijao e mandioca submetidos a dois niveis de N no solo

The objective of this study is to explore the possibilities of improving production and income on small farms through better allocation of resources. It pertains to the area that represents the low potential cereal crops zone (LPCZ) of Ethiopian highlands in the Shoa region. The basic primary dat...


Belete, A.Dillon, John L.Anderson, F.M.[Efficiency of small-scale farmers in Ethiopia: A case study in the Baso and Warana sub-district]Efficiency of small-scale farmers in Ethiopia: A case study in the Baso and Warana sub-district

The Andean blackberry (Rubus glaucus) is an important source of income in hillside regions of Colombia. However, growers have little reliable information on the factors that affect the development and yield of the crop, and therefore there is a dearth of information onhowto effectively manage the...


Jiménez, D.Cock, James H.Satizabal, HFBarreto Sáenz, MAPérez Uribe, A.Jarvis, AndyDamme, Patrick van[Analysis of Andean blackberry (Rubus glaucus) production models obtained by means of artificial neural networks exploiting information collected by small-scale growers in Colombia and publicly available meteorological data]Analysis of Andean blackberry (Rubus glaucus) production models obtained by means of artificial neural networks exploiting information collected by small-scale growers in Colombia and publicly available meteorological data
Sopheap, UPatanothai, AAye, Tin Maung[Unveiling constraints to cassava production in Cambodia: an analysis from farmers' yield variations]Unveiling constraints to cassava production in Cambodia: an analysis from farmers' yield variations

Cassava is a major source of carbohydrate for populations in the tropics; however, there is little information about the preferences of consumers toward the quality characteristics of this crop. This paper analyzes the demand for different cassava attributes, and applies the hedonic price method ...


González, C.Johnson, Nancy L.[Consumer preferences for table cassava characteristics in Pernambuco, Brazil]Consumer preferences for table cassava characteristics in Pernambuco, Brazil

The herbicides dalapon, glyphosate, paraquat, MSMA, and diuron were evaluated for their postemergence selectivity in cassava (Manihot esculenta Crantz). Four methods of application were also tested: with a shield, directed without a shield, and hitting the lower 25 or 50 percent of the plant. In ...


Piedrahíta Castañeda, WilsonDoll, J.[Herbicidas postemergentes en yuca (Manihot esculenta Crantz) selectividad, metodos de aplicacion e interaccion con edad]Herbicidas postemergentes en yuca (Manihot esculenta Crantz) selectividad, metodos de aplicacion e interaccion con edad

Twenty-six herbicides were evaluated at 3 rates each in cassava (Manihot esculenta Crantz). For the 21 preemergence herbicides, planting was done before application in half the plot and then in the other half. After incorporating the 5 preplant-incorporated products, half the plot was ridged befo...


Doll, Jerry D.Piedrahíta Castañeda, Wilson[Margen de selectividad de varios herbicidas en la yuca]Margen de selectividad de varios herbicidas en la yuca

Two studies were conducted to determine the best integrated weed control system for cassava (Manihot esculenta Crantz), in addition to the selectivity of preplant incorporated (PPI) herbicides and their interactions with the planting system. Three preemergence treatments followed by hand weeding ...


Piedrahíta Castañeda, WilsonMesia P., R.Doll, J.[Control integrado de malezas y uso de herbicidas PSI en yuca (Manihot esculenta Crantz)]Control integrado de malezas y uso de herbicidas PSI en yuca (Manihot esculenta Crantz)

A survey of weeds and weeding practices was carried out by a team of agricultural economists and agronomists on 283 farms in 5 cassava-growing regions of Colombia at 3 times during a cropping season. From 71-78 percent of the weed species present were broad- leaved species. As cassava grew older,...


Doll, J.Pinstrup-Andersen, PerDíaz, R.O.[An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia]An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia

China is the largest worldwide potato producer where around half of the crops is planted in the semi-arid region frequently affected by water restriction. While innovative methods are needed for water-saving irrigation methods, the use of low-cost and environmental-friendly technology must be pri...


Qin, J.Ramírez, D.Xie, K.Li, W.Yactayo, W.Jin, L.Quiróz, R.[Is partial root-zone drying more appropriate than drip irrigation to save water in China? A preliminary comparative analysis for potato cultivation]Is partial root-zone drying more appropriate than drip irrigation to save water in China? A preliminary comparative analysis for potato cultivation

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