. Basic slags and rock phosphates . and it is quite clear that some other factor besides chmate, hme andphosphate is responsible for the failure of the clover plant. Chemically the soil at Tysea Hill differs from that at MartinsHearne in having a lower content of available potash, and it seems 62 EFFECT OF PHOSPHATES probable that an inadequacy of potash is responsible for the failureof the clover. The effect of grazing and continuous cutting on the condition ofthe botanical flora is well illustrated in Table XXXIV and Fig. 12,which show the percentage of the ground space covered by the florao
. Basic slags and rock phosphates . and it is quite clear that some other factor besides chmate, hme andphosphate is responsible for the failure of the clover plant. Chemically the soil at Tysea Hill differs from that at MartinsHearne in having a lower content of available potash, and it seems 62 EFFECT OF PHOSPHATES probable that an inadequacy of potash is responsible for the failureof the clover. The effect of grazing and continuous cutting on the condition ofthe botanical flora is well illustrated in Table XXXIV and Fig. 12,which show the percentage of the ground space covered by the floraon the slag plots at Latchingdon and Horndon during 1919. Table XXXIV. Percentage of the Ground Space occupied byTHE Vegetation on the Basic Slag Plots AT Latchingdon and HorndonDeterminations made: Aug. and Sept. 1919 Latchingdon Cut 4 years insuccession HOENDON Cut 1918grazed 1919 Clovers Grasses Bare space 181 51-2 00 30-7 45-2 37-9 7-5 9-4 cSft 13 o PM 60 50 40 30 20 10 i I n 1 Clover Crass Weeds Bare space x\\x\x iiiil. Horndon. Cut 1918:grazed 1919. Latchingdon. Cut fouryears in succession. Fig. 12. Percentage of Ground Space occupied by the Vegetation on the Basic SlagPlots at Latchingdon and Horndon. Season, 1919. Soil London clay. The bottom at Latchingdon, it will be seen, is an open one, andalthough it shows a great improvement in this respect over the un*treated plot, it is not nearly so close as that at Horndon. AtLatchingdon the clover disappears in the autumn and come againthe following year towards the end of May or the beginning of Horndon on the other hand the surface is covered with a networkof clover runners, and there is practically no bare space on theplot. The Essex farmer still holds to the practice of grazing andcutting his meadows in alternate years, and in view of these results ON MOISTURE CONTENT OF SOIL 63 and the climatic conditions of the county, there is much to be saidfor this practice. The botanical analyses from all the centres
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