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The accumulation and cycling of nutrients in planted forest is essential to the establishment of management practices that can lead to the sustainable production of the forest site. The uptake, accumulation and release of nutrients depend on tree age and stage of development. The knowledge of acc...


Silva, H.D. daFerreira, C.A.Bellote, A.F.J.[Quantification of the biomass and nutrients in the trunk of Eucalyptus grandis at different ages]Quantification of the biomass and nutrients in the trunk of Eucalyptus grandis at different ages

Aluminum is usually regarded as the determining factor for plant growth in acid soils and nutrient deficiencies are often additional growth-limiting factors in tropical acid soils. Taking into account the potential interactions between Al toxicity and nutrient deficiencies, the present study inve...


Akhter, AKhan, S.H.Hiroaki, ETawaraya, KRao, Idupulapati M.Wenzl, PeterIshikawa, S.Wagatsuma, Tadao[Greater contribution of low-nutrient tolerance to sorghum and maize growth under combined stress conditions with high aluminum and low nutrients in solution culture simulating the nutrient status of tropical acid soils]Greater contribution of low-nutrient tolerance to sorghum and maize growth under combined stress conditions with high aluminum and low nutrients in solution culture simulating the nutrient status of tropical acid soils

We detail the impact of abandoned traditional settlements (or bomas) on plant and nutrient succession in the Amboseli ecosystem, southern Kenya, over the course of a century. Plant and soil data were sampled on and around abandoned settlements. The term, ‘onsite’, refers to the area within the pe...


Muchiru, A.N.Western, D.Reid, Robin S.[The impact of abandoned pastoral settlements on plant and nutrient succession in an African savanna ecosystem]The impact of abandoned pastoral settlements on plant and nutrient succession in an African savanna ecosystem

Phosphorus (P) uptake by plant roots depends on P intensity (I) and P quantity (Q) in the soil. The relative importance of Q and I on P uptake is unknown for soils with large P sorption capacities because of difficulties in determining trace levels of P in the soil solution. We applied a new isot...


Pypers, PieterDelrue, JDiels, J.Smolders, EMerckx, R.[Phosphorus intensity determines short-term P uptake by pigeon pea (Cajanus cajan L.) grown in soils with differing P buffering capacity : Comparison of E- and L-values]Phosphorus intensity determines short-term P uptake by pigeon pea (Cajanus cajan L.) grown in soils with differing P buffering capacity : Comparison of E- and L-values

There are several indications that legumes are capable of accessing sparingly soluble phosphorus (P) in the soil through root-induced processes. We hypothesize that this plant-induced mobilization of P can be demonstrated if the plant accessible P assessed by isotopic dilution ( L-value ) exceeds...


Pypers, PieterLoon, L. vanDiels, J.Abaidoo, R.C.Smolders, EMerckx, R.[Plant-available P for maize and cowpea in P-deficient soils from the Nigerian Northern Guinea savanna : Comparison of E- and L-values]Plant-available P for maize and cowpea in P-deficient soils from the Nigerian Northern Guinea savanna : Comparison of E- and L-values

Organic resources constitute a major source of nutrient inputs to both soils and livestock in smallholder tropical production systems. Determination of resource quality attributes using current laboratory methods is both timely and costly. This study tested visible and near-infrared (wavelengths ...


Shepherd, Keith D.Palm, C.A.Gachengo, CNVanlauwe, Bernard[Rapid characterization of organic resource quality for soil and livestock management in tropical agroecosystems using near-infrared spectroscopy]Rapid characterization of organic resource quality for soil and livestock management in tropical agroecosystems using near-infrared spectroscopy

Seed analysis can indicate differences in micronutrient availability between soils. Comparison of Phaseolus vulgaris L. with published analytical data indicated that the micronutrients most limiting for N2-fixation and growth in parts of East and soLithem Africa were Mo and Cu. Significant differ...


Brodrick, SJAmijee, FKipe-Nolt, Judith A.Giller, Ken E.[Seed analysis as a means of identifying micronutrient deficiencies of Phaseolus vulgaris L. in the tropics]Seed analysis as a means of identifying micronutrient deficiencies of Phaseolus vulgaris L. in the tropics

Cowpea (Vigna unguiculata [L.] Walp.) is an important grain legume in the semiarid zone of West Africa as it is a major source of dietary protein for the people. It is usually grown as an intercrop with the major cereals, namely millet and sorghum. Despite its importance, its yields are very low ...


Bationo, B. AndréNtare, B.R.Tarawali, Shirley A.Tabo, Ramadjita[Soil fertility management and cowpea production in the semiarid tropics]Soil fertility management and cowpea production in the semiarid tropics

Revised reference values of available soil phosphorus by Bray I below which bean (Phaseolus vulgaris L.) and sorghum (Sorghum bicolor L.) yield response to applied P is expected, were 6 and 9 ppm, for January and July soil sampling dates, respectively. Reference values determined for interpretati...


Drechsel, PayMutwewingabo, BHagedorn, FWortmann, Charles S.[Soil and foliar phosphorus determination in Rwanda: Procedures and interpretation]Soil and foliar phosphorus determination in Rwanda: Procedures and interpretation

Stages in the diagnosis of an interveinal leaf chlorosis in bean in the Usambara Mountains of northern Tanzania are described. Leaf tissue analysis, soil analysis, a 25 factorial trial with treatments of nitrogen, phosphorus, potassium, the trace elements copper and zinc and lime at one location ...


Smithson, James BradyEdje, O.T.Giller, Ken E.[Diagnosis and correction of soil nutrient problems of common beans (Phaseolus vulgaris) in the Usambara mountains of Tanzania]Diagnosis and correction of soil nutrient problems of common beans (Phaseolus vulgaris) in the Usambara mountains of Tanzania

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