1. A standard guide to soil fertility investigation on farmers' fields
Author: Hauser, G. F
Library: Central Library of Agricultural (Tehran)
Subject: $ASoils$BStandards,$ASoil fertility$BInvestigation
Classification :
S
590
.
F58
no
.
11
2. Guide to the calibration of soil tests for fertilizer recommendations
Author: Hauser, G. F.
Library: Central Library of Agricultural (Tehran)
Subject: $ASoils$BTesting,$ACalibration
Classification :
S
590
.
F12
no
.
18
3. Soil fertility investigations on farmer's fields
Author: Hauser, G. F.
Library: Central Library and Information Center of Ferdowsi University of Mashhad (Khorasan Razavi)
Subject: ، Soil fertility,، Fertilizers and manures
Classification :
S
591
.
H39
1977
