Stephens Book of the Farm: Dealing Exhaustively With Every Branch of Agriculture, Vol. 1 of 3 (Classic Reprint)

Experiments in Mandbjnq Crops. Rothamsted Experiments. page I I 22 Their origin ... Main features of the work The soil Scope of the manurial experiments .S oil and drainage-water investigations Scientific character of the trials Experiments on the continuous growth of wheat Without manure .... With farmyard manure Plant-food in dung .L imits to high manuring .N itrogen in dung Mechanical influence of dung .W ith ash constituents .M ineral theory Nitrogen of the soil and atmosphere insufficient Ammonium -salts with ash constituents .... Organic manures unnecessary .S ihca unnecessary .A rtificial supply of nitrogen essential for wheat Manures best for cereals .E xcessive dressings unprofitable Com and straw from high manuring .... A mmonium-salts alone Natural supplies of ash and nitrogen .... Soils better supplied with ash than with nitrogen Importance of ash constituents Ammonia with individual ash constituents .... Relative importance of the ash constituents .... Effect of autumn and spring applications of ammoniumsalts ..... Spring sowing preferable .9 lo Rainfall and time of sowing manure .... With nitrate of soda .N itrate of soda excels a monium-salts Influence of rainfall .P roportion of com to straw .I nfluence of season Influence of light and heat Autumn and winter weather Conditions favourable to large crops .... A sh constituents and the seasons Effectsof residues of manures Residues of previous manuring Tracing the fate of manures Loss of nitrates in drainagewaters .... Loss of other manurial elements in rain-water Evidence of analyses Natural restoration of nitrogen Residues of nitrogen not accounted for .T he fate of mineral constituents Behaviour of lime in the soil Continuous growth of barley Manures applied .M aintenance of yield under the continuous growth of barley on the same land .. .E ffect of nitrogenous manures Effect of mineral manur
(Typographical errors above are due to OCR software and don't occur in the book.)