881 



minerals, l)y $108.04; l)aniviir<I iiiaiinre was It-ss ciTectivc tlian iniiu-rals alone, 

 increasing the net value: Ixit $26.69. 



, As in the other (experiments, tlie <?reafest not valine was secured froui th(> smaller 

 quantity of nitrate of soda, and in both cases the second a])]>1ica<iou proved of 

 value. * * * 



'I'he average results secured under the varied conditions of soil and season, included 

 in the three years of exijcriuient, seem to warrant the ])ractical couclusiou that 

 under the conditions considered favorable for the growth of tomatoes, that is. good 

 cultivation and previous liberal fertilization, the apiilication of 160 pounds per acre 

 of nitrate of soda alone will be uniforndy more profitable for early tomatoes than 

 combinations of minerals, barnyard manure, or a complete fertilizer. 



New Jersey Stations, Special Bulletin P, April 9, 1892 (pp. 24). 



Field experiments with fertilizers on potatoes, E. B. 

 VooRiiEES, M. A. (pp. 3-16). — These were in continuation of experi- 

 ments in 1890, reported in Bulletin No. 80 of the station (see Experi- 

 ment Station Record, vol. iii, p. 32), and were carried out on three 

 farms within the State, which will be designated by number. The 

 main objects were to compare (1) barnyard manure with commercial 

 fertilizers, (2) mixed minerals with complete fertilizers, (3) muriate 

 and sulphate of potash with kainit, and (4) nitrate of soda with dried 

 blood. 



The land used for experiment No. 1 was of medium fertility, well 

 ad<apted to potatoes, and had received no manure since 1885; that for 

 No. 2 was of fair natural fertility and had not been manured since 188C. 

 The soil used for No. 3 "was uniform in character, and while of good 

 natural fertility had suffered neglect. * * * Manures had never 

 been used in large quantities." 



Each experiment included 14 twentieth-acre plats. Three of these 

 remained unmanured; 1 received 20 tons of barnyard manure per acre, 

 and another 10 tons of manure with 100 pounds nitrate of soda, 160 

 pounds boneblack, and 80 pounds sulphate of potash. On the others 

 conibinatious of 320 pounds boneblack, with 160 pounds muriate of 

 potash, 160 i>ounds sulphate of potash, and 610 pounds of kainit 

 were used without nitrogenous fertilizers, and each of these combina- 

 ti(ms was applied with 200 pounds nitrate of soda, and with 280 pounds 

 (hied bl(»od, furnishing like amounts of nitrogen jier acre. This 

 arrangement afforded opportunity for comi)aring the efi'ects of the 

 three potash manures with each other in two series of plats, with and 

 without nitrogen, and of comparing the nitrogenous fertilizers with 

 ea(di other and with mixed minerals. Early Rose i)otatoes were raised 

 in the first two experiments and Burbank in the third. 



"The season in Gloucester County [where experiments Nos. 1 and 2 

 were located] was but tairly favorable throughout; in Middlesex 

 County [No. 3] the amount of rain was below the average in May and 

 June and the weather rather cool, but the vines made a continuous 

 and rapid growth." 



26624— No. 12 4 



