Pander
发表于 2025-3-25 06:21:32
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消音器
发表于 2025-3-25 08:04:44
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Magisterial
发表于 2025-3-25 12:41:11
Distribution of excreted nitrogen by grazing cattle and its effects on sward quality, herbage producmore, the benefit from N circulation through urine and dung is not of significance for the pasture as a whole. Of the negative effects, poaching has the greatest influence on the response of pasture production to N fertilization..Two one-year experiments are described which showed that there were no
chiropractor
发表于 2025-3-25 17:21:53
Cattle slurry and farmyard manure as fertilizers for forage maizeoils and their residual effect has been studied..Yield levels were mainly determined by temperature and water supply, and were favoured by large amounts of cattle slurry up to 200–300 t ha.yr. or 200 t ha.yr. of farmyard manure. Even with annual manure rates of 100–200 t ha., the crops responded pos
SOBER
发表于 2025-3-25 20:31:11
Utilization of nitrogen from slurry applied to fodder crops. Research report from the Nordic countrithe project is to study how slurry from intensive pig and dairy cattle holdings can be utilized in crop production in an economic and environmentally acceptable manner. The applications correspond to a slurry production of 0, 1,2 and 4 dairy cow units ha. yr., . about 0, 50, 100 and 200kg NH..-N ha.
高兴去去
发表于 2025-3-26 00:26:20
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Charlatan
发表于 2025-3-26 07:51:34
Nitrogen losses from animal manures: from grazed pastures and from applied slurryions and losses either from excreta returned directly to grazed pastures or from slurry applied to grassland is reviewed. The three major pathways of N loss after return of excreta, namely gaseous emission . through ammonia (NH.) volatilization and denitrification), surface run-off and leaching are
树上结蜜糖
发表于 2025-3-26 09:51:36
Phosphorus and heavy metals: accumulation and consequencesil. When the cumulative excess becomes large compared to the buffering capacity of the soil adverse effects may arise. Phosphorus may leach to ground- and surface water causing eutrophication. Heavy metals may bring about a reduction in crop yield and livestock performance or affect the quality of t
fiction
发表于 2025-3-26 13:03:56
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啤酒
发表于 2025-3-26 19:43:19
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