Yazar
b s pickett
4 cilt bulundu.
Cilt sonuçları
Field experiments in spraying apple orchards in 1913 and 1914
B. S. Pickett · University of Illinois Agricultural Experiment Station
509 sayfa · 1918
Diseases and pests / Apples / Spraying and dusting in agriculture
Field experiments in spraying apple orchards
B. S. Pickett · University of Illinois Agricultural Experiment Station
212 sayfa · 1916
Diseases and pests / Apples / Spraying and dusting in agriculture
Four aphids injurious to the apple
B. S. Pickett · University of Illinois Agricultural Experiment Station
Sayfa sayısı yok · 1915
Aphids / Apples / Diseases and pests