Fertilizer responses of groundnuts (Arachis hypogae L.) under continuous intensive cultivation in the Nigerian savannah

A modified single solution method for the determination of phosphate in natural waters

J.E. Murphy, J.P. Riley · Analytica Chimica Acta · 1962 · 20.7K citations

Environmental Chemistry, Engineering, Natural Waters +5

Methods of Analysis for Soils, Plants and Waters

HOMER D. CHAPMAN, P. F. Pratt · Soil Science · 1962 · 2.5K citations

Soil Characterization, Soil Property, Engineering +5

Determination of nitrogen in soil by the Kjeldahl method

J. M. Bremner · The Journal of Agricultural Science · 1960 · 1.8K citations

Environmental Chemistry, Salt Concentration, Engineering +10

THE CLASSIFICATION OF SOME NIGERIAN SOILS

Milo I. Harpstead · Soil Science · 1973 · 52 citations

Soil Pedology, Aeolian Process, Engineering +13

Soil Fertility Under Continuous Cultivation in Northern Nigeria. II. Responses to Fertilizers in the Absence of Organic Manures

Richard Heathcote, K. R. Stockinger · Experimental Agriculture · 1970 · 47 citations

Engineering, Continuous Cultivation, Soil Science +12