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A sward of perennial ryegrass cv. S23 grown during 1979-81 was treated on 20 April with 130 kg N/ha as ammonium nitrate doubly labelled with 15N, foll...
Read moreAccording to the duration of dormancy, 3 different classes could be recognized among African accessions. Material originating in the low-rainfall trop...
Read moreSoyabeans were grown in pots at 20, 40, 60, 80 or 100% of field capacity or were allowed to wilt 1-5 times during the growth cycle. Small decreases in...
Read moreWith the passage of the Multiple Use Sustained Yield Act of 1960, the U.S. Forest Service has managed its 193 million acres of forest and grassland fo...
Read moreYoung plants of 5 species were grown in pots for 8-16 days in daylight under shades constructed of 6-mm strips. The shades were fixed or were made to ...
Read moreAgricultural and invasive weeds are major threats to managed and natural ecosystems, costing billions of dollars annually. Models for arable and invas...
Read moreArtificial reefs are used around the world for many purposes, including widespread deployment to increase fishery yields. These reefs are well-studied...
Read moreCompetition from weeds (Agropyron repens, Stellaria media, Poa annua and others) in the first growing season hastened foliage senescence and reduced b...
Read moreThe relationship between the wt. of above-ground biomass/unit area (y) the number of plants/unit area and time can be expressed in terms of arbitrary ...
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