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A four year field study was conducted in central Texas to evaluate the effects of sorghum (Sorghum bicolor L. Moench) genotype, fertilizer N application rate and stover removal on crop yields and plant nutrient uptake and partitioning. Fertilizer N application rates of 112 kg ha were generally su...


Powell, J.M.Hons, F.M.[Fertilizer nitrogen and stover removal effects on sorghum yields and nutrient uptake and partitioning]Fertilizer nitrogen and stover removal effects on sorghum yields and nutrient uptake and partitioning
Autor: Powell, J.M.

A study conducted to test the stability of HI (Harvest Index) relationships for major crops cultivated in West Africa over a range of management levels as an indicator of the quantity of crop residue on offer and to divide the residue of each crop into component plant parts to gain preliminary in...


Powell, J.M.[Assessment of dry-matter yield from grain yield in the West African savannah zone]Assessment of dry-matter yield from grain yield in the West African savannah zone
Autor: Powell, J.M.

Describes a study to determine grain & stover yields of sorghum & millet under traditional farming systems in the subhumid zone of Nigeria and observe consumption of stover components by livestock within the first two months of the dry season, w. data on chemical composition of leaf & stalk compo...


Powell, J.M.[Yields of sorghum and millet and stover consumption by livestock in the subhumid zone of Nigeria]Yields of sorghum and millet and stover consumption by livestock in the subhumid zone of Nigeria

Animal manure is of vital importance to soil-fertility maintenance in semi-arid West Africa due to its intrinsic value as a soil amendment and because of the low level of inorganic fertiliser use. This paper provides a regional overview of manure utilisation for food crop production. Results of e...


Williams, Timothy O.Powell, J.M.Fernández Rivera, S.[Manure utilisation, drought cycles and herd dynamics in the Sahel: implications for cropland productivity]Manure utilisation, drought cycles and herd dynamics in the Sahel: implications for cropland productivity

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