1) Soil testing for fertilizer recommendations: what's behind a reliable test

Author
Soltanpour, P. N
Series
Service in action volume no. 0.501
Publisher
Colorado State University Cooperative Extension
Pub. Date
1985.
Language
English

2) Soil testing for fertilizer recommendations

Author
Soltanpour, P. N
Series
Service in action volume no. 0.501
Publisher
Colorado State University Cooperative Extension
Pub. Date
1994.
Language
English

3) Soil test explanation

Author
Soltanpour, P. N
Series
Service in action volume no. 0.502
Crop series. Soil volume no. 0.502
Publisher
Colorado State University Cooperative Extension
Pub. Date
Not Supplied
Language
English

4) Soil, water, and plant testing

Author
Soltanpour, P. N
Series
Crop series. Soil volume no. 0.507
Publisher
Colorado State University Cooperative Extension
Pub. Date
[1996]
Language
English

5) Services of the Colorado State University Soil Testing Laboratory

Author
Soltanpour, P. N
Series
Service in action volume no. 0.507
Publisher
Colorado State University Cooperative Extension
Pub. Date
1988.
Language
English