Choosing legumes and perennial grasses

Many letters are received annually by the Iowa Agricultural Experiment Station requesting information on the different legumes and grasses. This publication has been prepared to answer the more important questions pertaining to the choice of legumes and grasses for different uses and conditions.2 Legumes of greatest value for different uses or soil conditions in Iowa are (1) alfalfa, (2) medium red clover, (3) mammoth red clover, (4) alsike clover, (5) white clover, (6) the biennial white and yellow sweet clovers, (7) hubam clover, (the annual white sweet clover) (8) Korean lespedeza, (9) dalea and (10) soybeans. A discussion of soybeans is largely omitted in this publication since the growing of this crop is entirely different from that of the others.

Values of X, Y and Z translation displacements estimated for all 342 participants.

<p>With the right eye viewed from the measuring instrument the coordinate convention is positive X toward the nasal side, while for the left eye positive X is towards the temporal side. In both eyes, the coordinate convention has positive Y towards the superior side and positive Z towards the frontward side.</p

Differences between corneal shape parameters determined for the right and left eyes.

<p>Differences between corneal shape parameters determined for the right and left eyes.</p

The Cartesian coordinate system of bilateral corneas.

<p>Points A to D were chosen to test instrument measurement repeatability and analyze interocular symmetry. Rotation angles α, β and γ could be positive or negative according to right hand spiral law.</p

Convergence procedure.

<p>Bilateral eyes fixed on a long-distance target (A). When eyes are fixed on a near-distance target during measurement, bilateral eyes turn inward (B). Corneal geometric axis turns towards the nasal side and corneal apex provided by the instrument is located on the nasal side of the corneal geometric center.</p

Intraobserver repeatability outcomes for elevation measurements obtained at four points on corneal surface.

<p>Sw = within-subject standard deviation; Pr = intraobserver precision; CV = coefficient of variation; ICC = intraclass correlation coefficient; A_OD is point A on the right cornea.</p

Bland-Altman plots for analysis of the agreement between bilateral eyes in R_x, R_y, Q_x and Q_y of anterior (A, C, E, G) and posterior surfaces (B, D, F, H).

<p>Bland-Altman plots for analysis of the agreement between bilateral eyes in R_x, R_y, Q_x and Q_y of anterior (A, C, E, G) and posterior surfaces (B, D, F, H).</p

Values of γ rotational angles estimated for all 342 participants.

<p>For clarity of presentation, participants were split into two groups according to whether γ of right corneas was greater than 0 (A, C) or less than 0 (B, D).</p

Translational and rotational displacement results of general quadratic model.

<p>Translational and rotational displacement results of general quadratic model.</p

Values of refractive error, corneal curvature, astigmatism and central thickness.

<p>SE = refractive error and converted to spherical equivalent, K_m = mean corneal curvature (the mean of corneal curvature in horizontal and vertical axis); CA = corneal astigmatism (the difference between corneal curvature in horizontal and vertical axis); CCT = central corneal thickness, MCT = minimum corneal thickness; CMVR = the ratio between CCT and MCT.</p