THICK SEEDING OF MILO IN THE SAN ANTONIO EEGION. 7 



That the wider spacmg in the rows increased the number of pend- 

 ent heads is also brought out. The percentage of pendent heads 

 increased from 0.6 per cent in the plat not thinned to 49 per cent in 

 the plat where the plants were spaced to 24 inches apart. 



It is erident that the yields from the plats in which the plants 

 were spaced 12, 18, and 24 inches apart in the 1914 experiments were 

 much lower than would be expected if the midge damage was uni- 

 form in the heads of the main stalks. Observations made at the 

 time the heads were maturing showed that the damage by this 

 insect in the three plats mentioned was much more severe than on 

 the plats where the plants were spaced less than 12 inches apart in 

 the row. It should be understood that this does not refer to the 

 tiUers or branches, for in no case, even on the plats where the plants 

 were closely spaced in the row, did over 5 per cent of the seed set. The 

 four rows of the plat where the plants were spaced 12 inches apart 

 were located beside the four rows of the plat thinned to 2 inches 

 apart, so that they were as nearly as possible on an equal footing, 

 and there was no apparent cause for a greater midge infestation in one 

 than in the other. The date of flowering of the main stalks was 

 practically the same in both cases. 



The effect of varied spacmg on the yield and the production of 

 tDlers and branches is shown graphically in jfigures 1 and 2. 



EFFECT OF ROW WIDTH AND SPACING ON TILLERING AND HEAD PRODUCTION. 



On May 15, 1913, counts were made of the number of stalks per 

 row and per plant on the plats already discussed. These counts 

 were made when the plants were about 18 inches high. At harvest 

 time the number of heads per plant on the same plants counted May 

 15 was determined. The results of these counts are given in Table IV. 



Table IV. — Stalks and heads per row and per plant on May 15 and at harvest time on 

 nine plats of milo planted at different widths and spaced differently at the San Antonio 

 Experiment Farm in 1913. 





Spacing. 



Number per row. 



Number per plant. 



Distance l^etween rows. 



Plants. 



Stalks, 

 May 15. 



Heads 



at 



harvest 



time. 



1,109 



1,209 



1,155 



1.0(10 



1 , 031 



811 



9.59 



899 



879 



Stalks, 

 May 15. 



Heads 



at 



harvest 



time. 



48 inr-hes 



Inches. 

 (') 

 2 

 5 

 8 

 12 

 18 

 5 

 5 

 5 



895 

 833 

 439 

 203 

 237 

 1.57 

 339 

 405 

 350 



2, (iOl 

 2, 357 

 2.198 

 l.Cll 

 1 , .501 

 1,0,50 

 1,9.50 

 1,.573 

 1,763 



2.9 

 2.8 

 6.0 

 5. 5 

 0.3 

 0.7 

 5.7 

 3.9 

 .5.0 



1 3 



48inr;heH 



1 5 



■WlncheH 



2 (J 



48 inoheN 



3 



48 i nr-hes 



4 3 



48 1 rifhes 



5.2 



44 ln''h(!N 



2 8 



40in('h(n 



2 2 



».ln(h(-f 



2.5 



I Not thinned. 



