ENVS 2060 Lecture Notes - Lecture 2: Soil Survey, Winter Wheat, Pedosphere
31 Mar 2016
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Document Summary
World population has doubled since 1967: set amount of resources, being split between more and more people, land we"re using is good land, the stuf we"re not isn"t ideal, set amount of land to work with. Wheat yield in the uk: was pretty stagnant, then yield went up around 1950 (faster than population) 85kg of extra grain/year, 3. 5x more (similar trend for winter wheat and soybeans, due to: Issues related to management of crops: yield is determined by: Sunlight (only so much energy per m^2 of soil we reach the maximum) Dokuchaev (russia: made a transect from s to n of russia, made observations of soil, observed the surroundings. Soils were part of the environment and a product of the environment changes in climate, vegetation, etc. efected soil. Galbraith (can: first canadian soil survey. S o i l a s a p a rt o f t h e e n v i r o n m e n t.
