The individual plant. The plant population. Concepts of efficiency in primary production. Factors affecting efficiency in plant production. Natural grassland. Mixed populations of plant species. Grass as a cultivated crop. The fauna of grassland. Grass as a food for animals-ruminants. Grass as a food for animals-non-ruminants. The nutrient cycle. Grazing. Factors affecting the efficiency of utilization. Concepts of efficiency in secondary production. Factors affecting the efficiency od secondary production. Animal production from grassland-milk. Animal production form grassland-meat. Animal production form grassland-wood and hides. The contribution to man.
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The Individual Plant
The Plant Population
19 other sections not shown
agric agricultural amount animal population animals Anslow Aust biological botanical composition breeding calculation carbon dioxide cattle cent Chapter clover cocksfoot consumed contamination defoliation diet digestible organic matter dry matter dry-matter Ecol ecology ecosystems editors A. N. effect efficiency energy environment equation ewes example expressed factors faeces feed fertilizer food required grass crop grassland ecology Grassld Congr Grassld Soc grazing animal harvesting Helsinki herbage herbivores important increase influence intake Kerry hill lactation lambs leaf leaf-area index legumes live weight Lolium perenne London maintenance maximum meat milk Milthorpe N.Z. Jl natural grassland nitrogen Nitrogen fixation nutrients nutrition output pasture percentage perennial rye-grass period photosynthesis plant population plant species ppm in dry predators primary production Proc Prod progeny proportion protein quantity rabbit relatively roots ruminant secondary production senescence sheep sown Spedding Table temperature urine varies vegetation wool Xth int yield