Nitrate of soda is also liable to the objection that the nitrogen in it is in a too quickly available form, and liable to be lost. I have never used it on my property, but from observing its effect on an estate in Coorg, and the effect it had in causing the trees to throw out a fine supply of young wood, can see that it might be used with great effect in rapidly forcing forward worn-out coffee growing on an exhausted soil. But if used for this purpose it should be backed up with a liberal supply of bones and castor cake, or of bones and farmyard manure, or bones and top soil, as, if not so backed up, the result would be unsatisfactory, if not disastrous, seeing that the nitrate of soda, if applied alone, would cause the plant to wring out everything that was available in the soil. The application of nitrate of soda on the estate alluded to was at the rate of 2 cwt. an acre, and cost 21 rupees an acre, inclusive of the cost of application. I saw the estate at the end of October, and the nitrate had been put down in March previous. The wood it had been the means of producing was very good and strong, dark green, and abundant, and the effect of the nitrate was by no means confined to one season, for the effect of the nitrate put down the year previous was still apparent. The land here evidently was short of nitrogen, and hence the good effect of the nitrate, but as I mentioned previously, an application of nitrate had produced no perceptible effect on another estate belonging to the same proprietor, which had been regularly well manured with bones and cattle manure and composts, and because, of course, the land was so well supplied with nitrogen that the coffee required no more. In concluding my remarks on the effects of nitrate of soda, I may observe that by using this manure, unremunerative coffee might be turned into a paying estate in less than two years, while without the aid of it, from three to four years would be required.

Potash is a manure as to which I can give no distinct information, or, at least, only information of a negative kind. I once sent out a small quantity of the muriate of potash, but my manager could perceive no effects from it whatever, and I have been informed of an instance of its having been applied to an estate in Coorg at the rate of one quarter of a pound a tree, or at the rate of between 3 and 4 cwt. an acre, without any perceptible effect having been produced from the application.

Then it must be remembered that the quantity of potash removed by an average crop of coffee is only 7½ lbs. an acre, that potash is firmly held by the soil, and that it is constantly being supplied in small quantities by the fallen leaves (these contain ¾ per cent. of potash) of the shade trees and the decomposition of stones in the soil, and in applications of farmyard manure. And with reference to the demands for potash by the tree, I may mention that I, in conjunction with a friend, endeavoured to estimate the consumption of potash by the crop, and we sent to Professor Anderson, of Glasgow, a carefully drawn sample of soil taken from between four coffee trees from which twelve crops of coffee had been removed without any manure being supplied, and also a sample of virgin soil adjacent to the coffee (soil similar in every respect except that it had not been cropped), and asked him to spare no expense in analysis. The result was remarkable, for the soil from which the twelve crops had been taken was found to be very little deteriorated in anything except the quantity of lime it held, which was less than in the virgin soil. The explanation evidently was that the leaves from the shade trees, and perhaps decomposing stones, had supplied all the potash removed by the crops. "Why, then," asked my friend, who had called on the Professor to hear the result of the investigation, "can young coffee easily be grown on the virgin soil, while it would come on very slowly and poorly in the soil from which the twelve crops of coffee had been taken?" "Simply," was the answer, "because the untouched virgin soil is in a beautiful physical condition, while the soil in the plantation has been rained upon and walked upon, and thus had its physical condition impaired." I need hardly add that what I have just written is highly instructive, as it corroborates what Sir John Lawes has said, and which I have previously quoted, as to the physical condition of the soil being of more importance than its, strictly speaking, chemical composition, and it shows us the importance of maintaining a perfect physical condition of the soil, partly by cultivation and partly by additions of bulk manure—farmyard manure—top soil, and composts.

To grow young plants in old soil requires great attention to manuring and preparing the soil, so as to supply the physical and chemical requirements necessary for the vigorous growth of the young plants. Now we know that the plants thrive well in virgin soil, and we cannot do better than fill the holes with it, if it can possibly be procured within any reasonable distance. If it cannot, then the soil should be mixed with some thoroughly decayed and dried cattle manure, mixed with bonedust, and if it is desired to rush the plant forward, a slight dressing of nitrate of potash might subsequently be applied.

Coprolites, the supposed fossilized remains of animals, which would probably contain about 40 to 50 per cent. of phosphate of lime, have been discovered in Mysore, and I am informed by an executive Engineer officer in the Mysore offices that they are to be found over an area of about two square miles, and at about a distance of seven miles from the Maddur Railway Station on the Bangalore Mysore line. This is a highly important discovery, and, when developed, ought to be the means of furnishing the planter with cheap supplies of the mineral phosphate of lime. I may mention that as one find of coprolites has been made in the province, it is highly probable that further discoveries of this valuable manure may be made. A discovery of phosphatic nodules has also been made near Trichinopoly, in the Madras Presidency, and though not of quality sufficiently good for export to England, has been reported on by Dr. Voelcker as being good enough for use amongst the plantations of Southern India. A deposit has also been discovered in the Cuddapah district.

We have now glanced at all the local manurial resources at the command of the planters, and also the manures which may be purchased at a distance from the plantations, and as to the latter the question now naturally arises as to how the planter can best lay out his money when manuring his coffee. Now I know of no planter in India who has knowledge enough to decide as to how he should lay out his money. The planter knows in a general way that he wants nitrogen, phosphoric acid, lime, and perhaps some potash, but as to the most desirable and economical sources from which to obtain them he is unable to decide, and it is not a question, even if he called in an agricultural chemist, to be decided once for all, for the prices of the various manures are constantly liable to change. Here, then, is a matter that should be taken up by the Government, which in this respect should follow the example of the Sussex Agricultural Association, the chemist of which publishes every spring the most economical manurial mixture which the farmer can use for his various purposes. In this thinly populated country the well-to-do planters are too few, and the humble native planters too poor, to do what is done by the rich agricultural societies of Great Britain in the way of aiding the farmer. The societies at home are mainly composed of landlords and the richer tenants. The Government in India is the one great landlord over two-thirds of British India, and should perform the duties of one.

In concluding my remarks on manures, I need hardly say that it is of the greatest importance to keep a careful record of all the manures put down, and a special manure book should be kept for this purpose, in which notes should be kept of the effects observed. But for ready reference I have found it most convenient to have a plan made of each field on the estate, and on one side of it a space should be left in order to enter the manures applied. The date on which the field was planted might also be entered on the plan.

Finally, I may remind the reader of the Tamul proverb which declares that "With plenty of manure even an idiot may be a successful agriculturist," and may add to it the English adage, which says to the farmer, "Never get into debt, but if you do, let it be for manure."

The work of bringing round an old and neglected plantation is by no means an easy one. The first thing to be done is to see to the physical condition of the land. This is sure to be hardened and deficient in vegetable matter, and this condition of things can only be remedied by applying large quantities of cattle manure or jungle top soil, or both. Now it will generally be found impossible to obtain enough cattle manure to fully manure even fifty acres in the year, nor, if it could be obtained in large quantities, would cattle manure have nearly such lasting effects in ameliorating the condition of the land as would applications of jungle top soil, and besides, the latter, if procurable (which it often is), can at once be applied in large quantities, and at about one-half the cost of cattle manure, in the case, as has been previously shown, of the best top soil, and at about the same cost in the case of the most inferior quality of top soil. It is evident, then, that great efforts should be made to procure a supply of jungle top soil, and the best top soil could of course be carried from a considerable distance without exceeding the cost of cattle manure. With the cattle manure or top soil, bonedust and white castor cake should be applied at the rate of 8 cwt. an acre, and 5 cwt. of the former to 3 cwt. of the latter; and, if the planter is in a hurry for immediate results, he might put down a small dressing of nitrate of soda—say 112 lbs. an acre. With the addition of the nitrate I feel confident, after observing the results of it on one of Mr. Mangles' estates in Coorg, that a remunerative crop would be picked in about two years after the application of the above suggested manures. I would particularly point out that, though the land, of course, must be well dug, the planter must not look to that alone for ameliorating the hardened condition of the soil, for however well dug, it will, unless cattle manure or jungle top soil should be applied, speedily run together again into as hardened a condition as ever. After the soil has been thoroughly manured and ameliorated in the manner suggested, moderate annual manuring will be quite sufficient for the future, for, as I have pointed out, coffee is not an exhaustive crop, though it is essential that a considerable supply of fertilizing matter should always be present in the soil. Where top soil is not available, red soil (kemmannu), if procurable, might be used with advantage, and the results of the experiments previously given seem to show that it might be even preferable to top soil.

After such an application of manure as I have above advised, the planter must be on his guard against producing such a heavy crop as will lead to an exhaustion of the tree, and a failure of the following crop. And should there be reason to apprehend an over heavy crop, it must be reduced by free handling and pruning.