Clovers and How to Grow Them

CHAPTER I. Introductory

INTRODUCTORY

In this book all the varieties of clover will be discussed that have hitherto been found of any considerable value to the agriculture of America. Varieties that are of but little value to the farmer will be discussed briefly, if discussed at all. The discussions will be conducted from the standpoint of the practical agriculturist rather than from that of the botanist. It is proposed to point out the varieties of clover worthy of cultivation, where and how they ought to be cultivated, and for what uses.

=Definition of Clover.=--According to Johnson's Encyclopaedia, clover or trefoil is a plant of the genus Trifolium and the family Leguminosae. The Standard Dictionary defines it as any one of several species of plants of the genus Trifolium of the bean family Leguminosae. Viewed from the standpoint of the American farmer it may be defined in the collective sense as a family of plants leguminous in character, which are unexcelled in furnishing forage and fodder to domestic animals, and unequaled in the renovating influences which they exert upon land. The term Trefoil is given because the leaves are divided into three leaflets. It is also applied to plants not included in the genus, but belonging to the same order.

The true clovers have their flowers collected into roundish or oblong heads and in some instances into cone-shaped spikes. The flowers are small and of several colors in the different varieties, as crimson, scarlet, pink, blue, yellow and white, according to the variety, and some are variously tinted. The stems are herbaceous and not twining. The seeds are inclosed in pods or seed sacks, each of which contains one, two and sometimes, but not often, three or four seeds. The plants have tap roots, and in some varieties these go far down into the subsoil. The roots are also in some varieties considerably branched.

=Varieties.=--At least twenty varieties, native or naturalized, are found in Great Britain; more than twelve varieties belong to the United States. The more valuable varieties found in this country have been introduced from Europe, unless it be the small white clover (Trifolium repens). Viewed from the standpoint of the agriculturist the varieties that are most generally useful include medium red clover (Trifolium pratense), alfalfa (Medicago sativa), alsike (Trifolium hybridum), mammoth (Trifolium magnum), crimson (Trifolium incarnatum) and small white (Trifolium repens). The varieties which flourish only in the South include the Japan (Lespedeza striata) and the burr clover (Medicago denticulata). Sweet clover (Melilotus alba), sometimes called Bokhara, which will grow equally well North and South, is worthy of attention because of its power to grow under hard conditions, in order to provide honey for bees and to renovate soils. Other varieties may render some service to agriculture, but their value will not compare with that of the varieties named.

The most valuable of the varieties named in providing pasture, include the medium red, the mammoth, the alsike and the small white. The most valuable in providing hay are the medium red, alfalfa and alsike. The most valuable, viewed from the standpoint only of soil renovation, are the medium red, mammoth, alsike, crimson, Japan and sweet. The most valuable in producing honey accessible to tame bees, are the small white, alsike and sweet.

=Distinguishing Characteristics.=--Clovers differ from one another in duration, habit of growth, persistence in growth, their power to endure low or warm temperatures, and ability to maintain a hold upon the soil. Of the varieties named, alfalfa, the small white and alsike varieties are perennial. That most intensely so is the first variety named. The medium red and mammoth varieties are biennial, but sometimes they assume the perennial quality. Sweet clover is biennial. The crimson, Japan and burr varieties are annual.

Some varieties, as alfalfa, crimson and sweet clover, are upright in their habit of growth. Others, as the small white and the burr, are recumbent. Others again, as the medium red, alsike and mammoth, are spreading and upright. The alfalfa and medium red varieties grow most persistently through the whole season. The sweet, small white and alsike varieties can best endure cold, and the sweet, Japan and burr varieties can best endure heat. The small white, Japan, burr and sweet clovers stand highest in ability to maintain a hold upon the soil.

The minor points of difference are such as relate to the shape and color of the leaves, the tints of shade that characterize the leaflets, the shape and size of the heads and the distinguishing shades of color in the blossoms.

The characteristics which they possess in common are the high protein content found in them, the marked palatability of the pasture and hay, unless in the sweet and burr varieties, the power which they have to enrich and otherwise improve soils, and the honey which they furnish.

=Plan of Discussion.=--Chapter I., that is, the present chapter, as already indicated, is introductory, and outlines the nature, scope and plan of the work. Chapter II. deals with the general principles and facts which relate to the growing of clovers. A close study of these will, in the judgment of the author, prove helpful to those who engage in growing any of the varieties of clover discussed in the book. Chapters III. to XI. inclusive treat of individual varieties, a chapter being devoted to each variety. It has been the aim of the author to discuss them in the order of the relative importance which they bear to the whole country and to devote space to them accordingly.

The following varieties are discussed and in the order named: Medium Red clover, Alfalfa, Alsike, Mammoth, Crimson, Small White, Japan, Burr and Sweet. All of these varieties will be found worthy of more or less attention on the part of the husbandmen in the various parts of this continent.

Chapter Xii. Is Devoted to a Brief Discussion of Miscellaneous Varieties

which have as yet been but little grown in this country, or of varieties of but local interest. The former are Sainfoin (Onobrychis sativa), Egyptian clover (Trifolium Alexandrianum), yellow clover (Medicago lupulina), Sand Lucerne (Medicago media), and a newly introduced variety of Japanese clover (Lespedeza bicolor). These may prove more or less valuable to the agriculture of the United States when they have been duly tested, a work which as yet has been done only in the most limited way. The latter include Florida clover (Desmodium tortuosum), more frequently called Beggar Weed, Buffalo clover (Trifolium reflexum), and Seaside clover (Trifolium invulneratum). These may be worthy of some attention in limited areas where the conditions are favorable, but it is not likely that they will ever be very generally grown. They are dwelt upon rather to show their small economic importance and with a view to prevent needless experimentation with plants possessed of so little real merit.

CHAPTER II. Some General Principles Which Apply to the Growing of Clovers

SOME GENERAL PRINCIPLES WHICH APPLY TO THE GROWING OF CLOVERS

In growing clovers, as in growing other crops of the same species, which embrace several varieties, certain features of management will apply more or less to all of these in common. It will be the aim to point out the chief of these in the present chapter.

=Adaptation in Clovers.=--Adaptation in the varieties of clover considered will be more fully given when discussing these individually, but enough will be said here to facilitate comparisons. Clover in one or the other of its varieties can be grown in almost all parts of the United States and Canada. Speaking in a general way, the medium and mammoth varieties can be grown at their best between parallels 37 deg. and 49 deg. north latitude. Alfalfa has special adaptation for mountain valleys of the entire West, but it will also grow in good form in parts of all, or nearly all, the other States. Alsike clover grows in about the same areas as the common and mammoth varieties, but it may also be grown further North, owing to its greater hardihood. Crimson clover has highest adaptation to the States east of the Allegheny Mountains and west of the Cascades, but will also grow in the more Central States south, in which moisture is abundant. Small white clover will grow in any part of the United States or Canada in which moisture is sufficiently present. Japan and burr clover grow best south of parallel 37 deg. and east of longitude 98 deg.. Sweet clover will grow in all the States and provinces of the United States and Canada, but has highest adaptation for the Central and Southern States.

With reference to adaptation to soils, medium and mammoth clover grow best on upland clay loam soils, such as have sustained a growth of hardwood timber, and on the volcanic ash soils of the Western mountain valley. Alfalfa flourishes best on those mountain valley soils when irrigated, or when these are so underlaid with water as to furnish the plants with moisture. Alsike clover has much the same adaptation to soils as the medium and mammoth varieties, but will grow better than these on low-lying soils well stored with humus. Crimson clover has highest adaptation for sandy loam soils into which the roots can penetrate easily. Small, white clover has adaptation for soils very similar to that of alsike clover. Japan clover and burr clover will grow on almost any kind of soil, but on good soils the growth will, of course, be much more vigorous than on poor soils. Sweet clover seems to grow about equally well on sandy loams and clay loams, but it has also much power to grow in stiff clays and even in infertile sands.

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