Food for 



Plants 



114 



Fertilizer Experiments on Meadow Land. Continued. 



TIMOTHY. 



Time Required for the Complete Exhaustion of Available 

 Fertilizing Materials and the Amounts of Each Remain- 

 ing in the Soil During a Period of Seven Years. 

 (FROM SCOTTISH ESTIMATES.) 



ON UNCULTIVATED CLAY LOAM. 



Kind of Fertilizer. Exhausted Percent. remaining in the soil unex 



(in years) . hausted at the end of each year. 



Lime 12 80 65 55 45 



Bone meal 5 60 30 20 10 



Phosphatic guanos 5 50 30 20 IO 



Dissolved bones and plain superphos- 

 phates 4 



High grade ammoniated fertilizers, 



guano, etc 3 30 20 oo oo oo oo oo 



Cotton-seed meal 5 40 30 20 10 oo oo oo 



Bam-yard manure 5 60 30 20 10 oo oo oo 



35 25 20 



oo oo oo 



OO 00 00 



20 10 5 oo oo oo oo 



ON UNCULTIVATED LIGHT OR MEDIUM SOILS. 



75 60 40 30 20 15 



Lime 10 



Bone meal 4 60 30 10 oo oo oo 



Phosphatic guanos 4 50 20 10 oo oo oo 



Dissolved bones and plain super-phos- 

 phates 3 20 10 5 oo oo oo oo 



High grade ammoniates, guanos 3 30 20 oo oo oo oo oo 



Cotton-seed meal 4 40 30 20 10 oo oo oo 



Barn-yard manure 4 60 30 10 oo oo oo oo 



ON UNCULTIVATED PASTURE LAND. 



Lime 15 80 70 60 50 45 40 35 



Bone meal 7 60 50 40 30 20 10 oo 



Phosphatic guano 6 50 40 30 20 10 oo 80 



Dissolved bone, etc 4 30 20 10 oo oo oo oo 



High grade ammoniated guanos 4 30 20 10 oo oo oo oo 



Cotton-seed meal 5 40 30 20 10 oo oo oo 



Barn-yard manure 7 60 50 40 30 20 10 oo 



