long dr john a (11 resultados)

Soft Cover. Condición: Very Good. Howard V. Brown (front cover) Ilustrador. First Edition. ----------pulp magazine, standard pulp size. Perhaps of interest to an ISAAC ASIMOV collector/researcher, as it contains an early, perhaps the earliest, letter to the editor from Asimov, age 14. Small (half-inch square) piece out of front cover fore-edge, faint cover creases, more than the usual small edge tears, a small piece of clear tape on a back cover tear, a VG copy. Back cover advertisement is for Camel cigarettes. Letter writers in letters-to-the-editor column: Clyde McCrary, Raphael Ehat, J.P. McCormack, Milton A. Rothman, Karl Van Campen (John W. Campbell), F.G. Hehr, ISAAC ASIMOV, Arthur L. Widner Jr., Jack Darrow, William S. Sykora, Dr. W.A. Gibson, Science Fiction Syndicate, Ira Melville Schey Jr., Ed Camille, Lawrence Devereff and Paul Poulsen.

Volume 19, Part 4, December 1999. P.365-472, (4 Contents Volume 19 & Index) with b/w illustrations (drawings, maps, photos). Soft cover. Signature of previous owner and stamp on on title-page, o/wise near fine. 29.8 x 21.

Paperback. Condición: New. This collection features four peer-reviewed reviews on phosphorus uptake and use in crops.The first chapter summarises the progress in research on root traits associated with phosphorus acquisition, including root morphology, architecture, biochemistry, colonisation by arbuscular mycorrhizal fungi, and fine root endophytes. The chapter also reviews the recent advances in breeding programmes to improve phosphorus acquisition efficiency.The second chapter discusses interactions between phosphorus management (phosphorus rate, source timing, and placement) and diverse cropping systems and climate and how these interactions are essential to efficient utilization of phosphorus resources.The third chapter assesses the key soil, root and microbial processes that influence phosphorus acquisition with a focus on factors that can be managed to ensure optimal use of fertiliser and development of root systems for improved phosphorus acquisition. A case study from Australia is used to demonstrate how phosphorus efficiency of grasslands can be improved.The final chapter reviews the environmental effects of phosphorus fertilisation in agriculture, primarily its impact on water quality. The chapter considers how future water quality issues can be mitigated and also examines the cycling, fate and transport of phosphorus in agriculture.

paperback. Condición: Very Good.

Paperback. Condición: New. This collection features four peer-reviewed reviews on phosphorus uptake and use in crops.The first chapter summarises the progress in research on root traits associated with phosphorus acquisition, including root morphology, architecture, biochemistry, colonisation by arbuscular mycorrhizal fungi, and fine root endophytes. The chapter also reviews the recent advances in breeding programmes to improve phosphorus acquisition efficiency.The second chapter discusses interactions between phosphorus management (phosphorus rate, source timing, and placement) and diverse cropping systems and climate and how these interactions are essential to efficient utilization of phosphorus resources.The third chapter assesses the key soil, root and microbial processes that influence phosphorus acquisition with a focus on factors that can be managed to ensure optimal use of fertiliser and development of root systems for improved phosphorus acquisition. A case study from Australia is used to demonstrate how phosphorus efficiency of grasslands can be improved.The final chapter reviews the environmental effects of phosphorus fertilisation in agriculture, primarily its impact on water quality. The chapter considers how future water quality issues can be mitigated and also examines the cycling, fate and transport of phosphorus in agriculture.

Condición: New. In.

Paperback. Condición: New. This collection features four peer-reviewed reviews on phosphorus uptake and use in crops.The first chapter summarises the progress in research on root traits associated with phosphorus acquisition, including root morphology, architecture, biochemistry, colonisation by arbuscular mycorrhizal fungi, and fine root endophytes. The chapter also reviews the recent advances in breeding programmes to improve phosphorus acquisition efficiency.The second chapter discusses interactions between phosphorus management (phosphorus rate, source timing, and placement) and diverse cropping systems and climate and how these interactions are essential to efficient utilization of phosphorus resources.The third chapter assesses the key soil, root and microbial processes that influence phosphorus acquisition with a focus on factors that can be managed to ensure optimal use of fertiliser and development of root systems for improved phosphorus acquisition. A case study from Australia is used to demonstrate how phosphorus efficiency of grasslands can be improved.The final chapter reviews the environmental effects of phosphorus fertilisation in agriculture, primarily its impact on water quality. The chapter considers how future water quality issues can be mitigated and also examines the cycling, fate and transport of phosphorus in agriculture.

Paperback. Condición: New. This collection features four peer-reviewed reviews on phosphorus uptake and use in crops.The first chapter summarises the progress in research on root traits associated with phosphorus acquisition, including root morphology, architecture, biochemistry, colonisation by arbuscular mycorrhizal fungi, and fine root endophytes. The chapter also reviews the recent advances in breeding programmes to improve phosphorus acquisition efficiency.The second chapter discusses interactions between phosphorus management (phosphorus rate, source timing, and placement) and diverse cropping systems and climate and how these interactions are essential to efficient utilization of phosphorus resources.The third chapter assesses the key soil, root and microbial processes that influence phosphorus acquisition with a focus on factors that can be managed to ensure optimal use of fertiliser and development of root systems for improved phosphorus acquisition. A case study from Australia is used to demonstrate how phosphorus efficiency of grasslands can be improved.The final chapter reviews the environmental effects of phosphorus fertilisation in agriculture, primarily its impact on water quality. The chapter considers how future water quality issues can be mitigated and also examines the cycling, fate and transport of phosphorus in agriculture.

Condición: New. Print on Demand.

Condición: New. Print on Demand.

Condición: New. PRINT ON DEMAND.