. Basic slags and rock phosphates . Wendens,Saffron Walden Hay cwts. per acreRainfall in inches 51-24-00 25-4 4-001 33-4 2-44 14-30-53 250 2-42$ Butterfields,Latchingdon Hay cwts. per acreRainfall in inches § 31-43-41 14-52-32 20-12-51 20-61-47 161 2-28 * -71 inch of rain fell three days before plots were 2-32 inches of rain fell on May 20th, -57 inch of rain fell two days previous to cutting.§ Rainfall figures for period May 1st till June 30th. 90 EFFECT OF RAINFALL The figures for the centre at Wendens are perhaps the most striking,the hay crop on the untreated plot varying from
. Basic slags and rock phosphates . Wendens,Saffron Walden Hay cwts. per acreRainfall in inches 51-24-00 25-4 4-001 33-4 2-44 14-30-53 250 2-42$ Butterfields,Latchingdon Hay cwts. per acreRainfall in inches § 31-43-41 14-52-32 20-12-51 20-61-47 161 2-28 * -71 inch of rain fell three days before plots were 2-32 inches of rain fell on May 20th, -57 inch of rain fell two days previous to cutting.§ Rainfall figures for period May 1st till June 30th. 90 EFFECT OF RAINFALL The figures for the centre at Wendens are perhaps the most striking,the hay crop on the untreated plot varying from 51 cwts. to 14 acre. Similar, although not quite so marked, fluctuations occurat all the other centres. The yearly rainfall figures afford no adequateexplanation of these differences. At Wendens, for example, the rain-fall for the year was 27-33 inches in 1917, and in 1918 when a biggeryield of hay was obtained, 25-68 inches. The distribution of therainfall, however, seems to be of great importance, particularly during. 0 2 4 6 8 Inches of Rainfall, till Harvest Fig. 23. Influence of Rainfall on the Yield of Hay on the Untreated Plots atTysea Hill # and Martins Hearne O- the months of May and June. If the rainfall figures for the periodMay 1st till harvest are tabulated with the yield of hay on the un-treated plot, as is the case in Table XLVII, it wiU be seen that, withone or two exceptions which can be readily accounted for, there isa very close connection between the two sets of figiu-es. The rainfall figures have been taken from the records of the BritishRainfall Organisation. Their station at Havering-atte-Bower is withintwo miles of each of the first three experimental centres. At Hasso-bury there is a rainfall station on the farm, whilst at Saffron Walden ON THE YIELD OF HAY 91 and Latchingdon the respective rainfall stations are within from twoto four miles of the experimental centres. The curve representing the correlation of the hay yield with therai
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