id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
afs-71547	Hänninen, Pentti; Kaila, Armi	Calcium nitrate and ammonium nitrate limestone as sources of nitrogen for oats and barley	1961	10	.pdf	application/pdf	4097	162	61	Calcium nitrate plants Ammonium nitrate plants N applied 25 kg/ha 3.49 % 3.55 % » 50 » 3.97 % 3.90 % » 75 I 4.60 % 4.42 % » 100 » 5.17 % 4.91 % In spite of the fairly large variation between the replicates, a statistically significant difference at the 5 per cent level exists in the nitrogen content of the plants treated with 100 kg/ha of N. The large variation in the nitrogen content of the samples from various repli- cates may be understood on the basis of the theory presented by Specht (2) of 166 the variation control mechanism. Discussion Since the last century the problem of the value of ammonium nitrogen and nitrate nitrogen as the nutrient source of plants has been studied and discussed.	cache/afs-71547.pdf	txt/afs-71547.txt