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Advances in Agronomy, Vol. 67 by Donald L. Sparks (Ed.) PDF

By Donald L. Sparks (Ed.)

ISBN-10: 0120007673

ISBN-13: 9780120007677

Advances in Agronomy is still famous as a number one reference and a prime resource of the most recent and most sensible learn in agronomy. As constantly, the themes coated are various and exemplary of the panoply of material handled by way of this long-running serial. quantity sixty seven comprises 4 complete and well timed reports on subject matters within the crop and soil sciences. bankruptcy 1 addresses the most energetic components in agronomic research--precision agriculture. bankruptcy 2 is a considerate evaluation on floor cost and solute interactions in soils. bankruptcy three completely covers advances within the use of molecular genetics to augment abiotic/edaphic tension resistance in turfgrass. bankruptcy four is an invaluable evaluate on an issue that's of serious curiosity to agronomists--allelopathy.

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Actually, residual N will be an issue when yields from the previous crop are less than yield goals and/or nitrogen use efficiencies are reduced. Therefore, yield maps combined with grain protein content and with N application maps should be a guide to precision N management but only where overwinter leaching is low. • Where there is a strong temporal component of spatial variability: Where residual N is low due to high leaching potential, precision N management must rely on prediction of crop yield, net N mineralization, N losses during N uptake period, and where amendments such as nitrification inhibitors will synchronize nitrate availability with crop uptake demand.

Not all agricultural areas are of equal agronomic importance to the United States. Certain critical areas from either an agronomic or an environmental perspective could be designated for enhanced NCSS activities. , what is needed and where it is needed) is applied to defining public and private-sector roles in the allocation of scarce fiscal resources. b. Interpolation of Point Samples Another technique for assessing spatial variability involves sampling processes. A network of points in some spatial arrangement is sampled and then interpolated to produce a spatial estimation (usually a map) of the whole area using a range of statistical procedures.

More important, public concerns regarding the impacts of pesticide use include health risks related to food safety, water quality, and worker safety and concerns over wildlife and ecosystem health. Therefore, agricultural management practices that reduce pesticide use, improve pest management, or reduce risks of pesticides to human and ecosystem health are very desirable. The intuitive appeal of precision agriculture is that it offers the potential for such 40 FRANCIS J. PIERCE AND PETER NOWAK benefits.

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Advances in Agronomy, Vol. 67 by Donald L. Sparks (Ed.)

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