Issues of Optimum Nutrient Supply for Sustainable Crop Production in Tropical Developing Countries

2006 ◽  
Vol 5 (4) ◽  
pp. 387-397 ◽  
Author(s):  
E.A. Akinrinde .
2007 ◽  
Vol 99 (4) ◽  
pp. 904-911 ◽  
Author(s):  
D. L. Tanaka ◽  
J. M. Krupinsky ◽  
S. D. Merrill ◽  
M. A. Liebig ◽  
J. D. Hanson

2021 ◽  
Vol 287 ◽  
pp. 112295
Author(s):  
Gulshan Kumar Sharma ◽  
Shakeel Ahmad Khan ◽  
Manoj Shrivastava ◽  
Ranjan Bhattacharyya ◽  
Anil Sharma ◽  
...  

2021 ◽  
Author(s):  
Pawandeep Singh Kohli ◽  
Kanika Maurya ◽  
Jitendra K. Thakur ◽  
Rahul Bhosale ◽  
Jitender Giri

1975 ◽  
Vol 8 (5) ◽  
pp. 268-270 ◽  
Author(s):  
W P Feistritzer

In this short article the author indicates the present stages of development of variety evaluation, testing, certification, production and marketing of quality seed—of cereals, industrial crops, pasture plants and vegetables—in major geographical regions of the world and draws attention to some of the underlying problems which must be faced in the future if further progress is to be made.


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