The discussion of the ('hemic context all yield of herb that is cut at monthly intervals) is therefore limiting. If a general examination of the data for the entire experimental period is made, one is forced to the conclusion that in the absence of soil :mel climatically the deficient stage of growth is the most important factor affecting the mineral and protein content of grazing species, but it may be mentioned that phosphate values are low during periods of dry weather.
Any changes in the plants' general comlihon during the trial period can therefore be reflected in the effect of the treatment, i.e. the highest yield for the entire experimental period \HtS obtained nt the end of the first lllOnth of the in~stigation. This can largely be attributed to the fact that none of the plates have yet been affected by drought or treatment.
There is a noticeable lag in the effect of rainfall on yield for J anum:y. The Thf' values for these components in the three-month and four-month systems consequences differ similarly from the figures obtained in the two-month system consequences. Of greater interest is the effect of this preliminary cutting in :\'ovember on the average yield of hay at the end of January.1· in relation to the average weight of hay crops obtained from thirel, fourth.
A consideration of the chemical data given in Table IV reveals the fact that due to the favorable climate.
SECTION 2.-NEW LY ESTABLISHED SPECIES
The species comprising the mixed sample and the climatic conditions are factors that undoubtedly do not influence the variations in phosphate content over the growing season. In general, the average percentage composition of the monthly cuts of the eleven species varies in a manner similar to that of the other ten species, discussed in part one of this article, from November to March. In the hull sample for January, minimum Yalu's for all inorganic substances and crude proteins and a maximum for naked fibers were again obtained.
Ch1·ysozwgon montana, Era.r;1·ostis sp., Paspalum dilataturn and Elyomt1'1ts w·genteus seem to have best resisted the dry weather conditions experienr:ecl from ::\lay to October 1933, e last - mention is made of grass s~owiug the green shoots even After a light shower at the beginning of September, a slight improvement is seen for the samples taken at the end of the month. In contrast to the results of the previous year, a remarkable improvement in the percentage composition of the herb in the samples for Kovember. Conditions ±or new gTO\Yth Temain favorable to the end of .Tanuar, 1934, hut because of the still higher degree of maturity,Y obtained by ihe herbage (:omposiJlg' the samples for 10-, 11- and 12) - monthly cuts at the eu(l of December be1·, January, aHd February, 1possible the percentage phosphn te .nnd crude protein gra c1 ua lly drops from. It should be noted that after a light shower in early September there is no improvement as Tesul.t no"· growth, a finding similar to the results of the previous season (dn Toit, et al, 19:{4). Greater improvement, especially in the percentage of potassium of chloride caused by heavy rains in Jan. To clarify this point, several mixed samples cut at the end of J. November were divided into old and new growth and analyzed separately. A study of the results given in Table XI and reference to the data in Table X shows the ver:t that the process by which minerals and proteins are lost in the herbal portion of plantR begins after about billion months of growth when the plants are mature. , probably earlier (c.£. Richardson, et. a.l., 19~H, 19:12),. In addition to the work of Richardson referred to above, the finding of Henrici (1930) that remigration of P 205 from leaves and shoots to root ant root neck during autumn is of interest in this respect, while it seems quite plausible that rain can be a have a binding effect on the constituents in old dry grasses that have been subjected to adverse effects. A gradual rise to a higher level, which is maintained for the rest of the lJeriod uncle di,.wu~~inn, iu. The six-month cuts made at the end of February 1934 represent undisturbed growth from the end of August and are compatible "with the total yields obtained from one-, tv.·o-, three- and four- months system, and as a result of growth 34; A study of the mineral content and food value of natural pastures in the Union of South Africa.
