Fertility studies reveal plant & soil needs
California Agriculture 30(7):13-15. DOI: 10.3733/ca.v030n07p13.
Not available – first paragraph follows:
Proper fertilization is important in realizing the great potential from the annual grasslands of California. One of the first studies indicated that forage production on improved dry-land pasture fertilized with nitrogen and phosphorus increased ten-fold over untreated pastures during the winter months of feed shortage. In another study it was found that fertilized pastures yielded about 3 1/2 times as much meat and wool as unfertilized pastures over the growing seas on.