ISSN:
1365-2494
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
In an attempt to measure the influence of leys on the yield of barley, as a means of measuring soil fertility, details of the yields of barley, fertilizer usage and rotations were collected from a number of Hampshire farms and compared with the average results obtained from the ley fertility experiment at Bridget's Experimental Husbandry farm. In the arable rotation experiment increasing the nitrogen level from 37 to 74 units, increased the barley yield from 20·2 cwt. to 24·3 cwt.Farm number 1 used 43 units of nitrogen compared with 61 units of nitrogen on farm 2. The yield rose from 18·7 to 25·4 cwt.Following 3 years grazed ley at Bridget's and increasing the nitrogen level from 37 to 74 units raised the yield from 25·5 cwt. to 29 cwt.Farms 4 and 5 used 47 units of nitrogen compared with 74 units of nitrogen on farms 7, 8 and 9. The yield rose from 24·7 cwt. to 30 cwt.Farms 6 and 10 obtained 29·1 and 28·7 cwt. from only 49 units of nitrogen and 26 units of nitrogen respectively, by the use of some lucerne leys on farm 6, and by only taking one grain crop on farm 10.A three year ley is therefore probably worth 15 cwt. of increased barley yield in the 3 succeeding crops of grain, when using not less than 26 units of nitrogen. An additional 5 cwt. of barley can be obtained annually by the use of 37 units of nitrogen.A sharp fall in yield in 1956 and 1957 on farm 10 to 217 cwt. may have been due to a reduction in the use of nitrogen, or other causes.Farm number 3, without livestock, obtained 28·1 cwt. when using 86 units of nitrogen. Was this due to the use of a 2 year ley and fallow crop in a six year rotation, or the use of additional nitrogen: farm 8, at the same level of nitrogen, stocking and use of clover, has only gained 2·3 cwt. per acre.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2494.1960.tb00159.x
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