Fig. 1.-The nitrogen factory of the farm. The nodules shown on the roots of the clover provide all the nitrogen needed for vigorous growth of the plant, and leave a surplus for the grasses in the pasture. Fig 2.- Minute subterranean clover plants establishing after surface sowing. The soil was very exposed and white clover was difficult to establish. Subterranean clover was sown at 5 lb. per acre. The photograph shows a selected and exceptionally good patch. Fig. 3.-The same patch about 18 months later. The subterranean clover has established well, and in addition to providing much valuable feed lit is raising the fertility for the grasses. Fig. 4.- A very poor and exposed danthonia pasture. Through repeated burnings the sward is practically pure danthonia. On this class of country topdressing, even when combined with surface sowing, is apt to prove a very slow and expensive method of renovation.

New Zealand Journal of Agriculture, Volume 63, Issue 3, 15 September 1941, Page 215

Fig. 1.- The nitrogen factory of the farm. The nodules shown on the roots of the clover provide all the nitrogen needed for vigorous growth of the plant, and leave a surplus for the grasses in the pasture. Fig 2.- Minute subterranean clover plants establishing after surface sowing. The soil was very exposed and white clover was difficult to establish. Subterranean clover was sown at 5 lb. per acre. The photograph shows a selected and exceptionally good patch. Fig. 3. -The same patch about 18 months later. The subterranean clover has established well, and in addition to providing much valuable feed l it is raising the fertility for the grasses. Fig. 4.- A very poor and exposed danthonia pasture. Through repeated burnings the sward is practically pure danthonia. On this class of country topdressing, even when combined with surface sowing, is apt to prove a very slow and expensive method of renovation.