Long term fertility studies at Samaru-Nigeria
Subtitle: II. Effect of farm-yard manure onmonocropped cotton, sorghum and groundnuts and a rotation of the three crops under continuous cultivation..
Contributors: Abdullahi, A.; Nigeria. Institute for Agricultural Research, Samaru.
Series: Samaru Miscellaneous Paper -- 72.
Publisher: Institute for Agricultural Research
Published: 1977
Place of publication: Zaria, Nigeria
Language: eng