soils, 28.

Peach borer, 127.
flower, 130.

Peanuts, 5.

Peat, 30.

Peppers, soil for, 28.

Percolation of water, 41.

Petals, 129.

Petunia, 129.

Pigweeds, 5, 6.

Pistil, 130.
function of, 131.

Phosphate, odorless, 198.
rock, 195.
slag, 195, 198.

Phosphoric acid, 195.
available, 195, 196.
in fertilizers, 195.
in soil, 148.