SUBJECT
Fertilizers and manures
Nitrogen fertilizers
Rice
11
Phosphatic fertilizers
2
Sorghum
2
Soybean
2
Agriculture
1
Ambary hemp
1
Ammonia as fertilizers
1
Companion crops
1
Dry farming
1
Economic aspects
1
Fertilizer industry
1
Grasses
1
Harvesting
1
Jute
1
Mung bean
1
PLant populations
1
Planting
1
Rotation of crops
1
Soil moisture
1
Sweet potatoes
1
Urea as fertilizers
1