Tussentijds verslag over 1959-1961 stikstoftijdstippenproefveld met appel te Heiningen (N.Br.)
The influence was studied of split dressings of N on susceptibility to lodging, on yields of grain and straw and on seed quality of a number of seed crops: poppy (Papaver somniferum), spinach (Spinacia oleracea), radish (Raphanus sativus), caraway (Carum carvi), winter swede-like oilrape (Brassica napus var. biennis) and canary grass (Phalaris cana...