1. Nitrogen in agricultural soils
Author: Frank j. Stevenson, editor
Library: Central Library and Information Center of Ferdowsi University of Mashhad (Khorasan Razavi)
Subject: Nitrogen content ، Soils,، Plants, Effect of nitrogen on,، Crops and soils,، Nitrogen fertilizers
Classification :
S
592
.
6
.
N5
N566
1982
2. Nitrogen in agricultural soils
Author: Frank J. Stevenson, editor
Library: Central Library and Documentation Center (Kerman)
Subject: ، Soils - Nitrogen content,، Plants, Effect of nitrogen on,، Crops and soils,، Nitrogen fertilizers
Classification :
S
592
.
6
.
N5
N56
1982
