. Basic slags and rock phosphates . 19 Soil: London clay. Sample taken: July sown: December, 1915 Plotl Basic Bessemer slag /o Plot 2 Gafsa rock phosphate /o Plots No manure o/ Plot 4 Open hearth (fluorspar) basic slag /o PlotsOpen hearthhigh solublebasic slag 1 /o PlotsOpen hearthhigh solublebasic slag 2 /o CloversGrassesWeeds 20-8 74-4 4-8 15-8 81-0 3-2 6-3 87-96-8 17-6 80-4 20 150 82-82-2 18-0 80-9 11 100-0 100-0 100-0 100-0 100-0 Composition of the grasses by weight 100-0 Lolium perenne ... 14-4 15-2 10-8 19-4 241 17-9 Phleum pratense ... 23-3 21-3 14-8 190 23-3 25-6 Cynosurus
. Basic slags and rock phosphates . 19 Soil: London clay. Sample taken: July sown: December, 1915 Plotl Basic Bessemer slag /o Plot 2 Gafsa rock phosphate /o Plots No manure o/ Plot 4 Open hearth (fluorspar) basic slag /o PlotsOpen hearthhigh solublebasic slag 1 /o PlotsOpen hearthhigh solublebasic slag 2 /o CloversGrassesWeeds 20-8 74-4 4-8 15-8 81-0 3-2 6-3 87-96-8 17-6 80-4 20 150 82-82-2 18-0 80-9 11 100-0 100-0 100-0 100-0 100-0 Composition of the grasses by weight 100-0 Lolium perenne ... 14-4 15-2 10-8 19-4 241 17-9 Phleum pratense ... 23-3 21-3 14-8 190 23-3 25-6 Cynosurus cristatus 15-7 18-3 11-6 20-4 22-3 19-3 Poa trivialis 8-5 10-8 7-6 12-4 15-7 10-8 Bromus mollis 33-9 8-7 3-6 4-2 — — Hordeum pratense 3-8 21-8 35-6 19-6 10-0 15-5 Agrostis alba — 3-0 6-8 20 2-0 2-4 Holcus lanatus ... 0-4 0-9 8-3 3-0 20 8-5 A nthoxanthumodoratum — — 0-9 — 0-6 — 100-0 100-0 100-0 100-0 100-0 100-0 Superior grasses ... 61-9 65-6 44-8 71-2 85-4 73-6 Inferior grasses ... 381 34-4 55-2 28-8 14i6 26-4 rfloo. Fig. 10. Botanical composition of the Hay, by weight, at Butterfields, , 1919. Soil London , Basic Bessemer slag. 2, Gafsa phosphate. 3, No , Open hearth fluorspar basic slag. 5, Basic slag. 6, Basic slag. ON BOTANICAL COMPOSITION OF HERBAGE 57 Butterfields, Latchingdon. The effect of the various phosphateson the composition of the flora at Latchingdon is similar to that atMartins Hearne and Tysea HiU. The botanical composition of thehay is shown in Table XXIX and in Fig. 10. The contrast betweenthe treated and untreated plots is not so marked as at the othertwo centres mentioned, but the pasture on the untreated plot atLatchingdon is much superior to that at Martins Hearne and TyseaHill (compare Figs. 7, 8 and 10). On all the treated plots the bettergrasses, such as Lolium perenne, Phleum pratense, Cynosurus cris-tatus and Poa trivialis, have improved their position at the expenseof the poorer quahty grasses, such as
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