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This e-book investigates new agricultural platforms reminiscent of natural and eco-friendly manuring, in addition to built-in pest administration practices, and appears at how they could enhance farm productiveness opposed to the improvements for the surroundings. a lot of the data provided makes a speciality of microinvestigation of the soil, and at the results of soil variability inside of fields on yields and nutrient flows.

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Extra info for Ciba Foundation Symposium 210 - Precision Agriculture: Spatial and Temporal Variability of Environmental Quality

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This integral scale is obviously the minimum scale that you’re going to work at, but it may not be the optimum one. Burrough: That is extremely important also for linking remotely sensed imaging to crop performance, because we’re dealing again with averaging over a particular area. 5 m. The difference was so extreme the patterns were not correlated with each other (Burrough 1991). Meshalkinu: I would like to add that the spatial distribution of the production may not correlate solely with the rooting systems.

O n a certain basis, you might want to say that a fair unit of evaluation is at the field scale, but how do you measure the environmental performance at the field scale? Can we use models to answer this SPATIAL VARIABILITY OF SOIL MOISTURE REGIMES 33 question? Can we use our models as regulatory tools? I know that there are people in this room who, if they are given some input data, will be able to tell us the herbicide output as a percentage of that applied. Soil scientists hate this idea, but I would suggest that in other disciplines models are used much more aggressively than ours.

Variation in surface waterpollution according t o the scale of anabsis This example is taken from an unpublished paper by B. Lennartz, X. Louchart, P. hndrieux & M. Voltz (6th Workshop Pesticide in Soil & Environ, 1 3 1 5 May 1996). These authors monitored losses of herbicides by run-off water at the field scale and at the outlet of the Roujan catchment. Two kinds of fields were distinguished according to the agricultural practices in use for controlling weeds. A first practice is to cultivate the soil between the rows of vinestocks and to spray herbicides along the rows.

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